Custom Mobile App Development 2025

Founder, Topflight Apps

October 19, 2024

Creating a killer app takes more than just a great idea—it’s about execution, user experience, and strategy. If you’re looking for a custom mobile app development guide, you’ve landed in the right place. Before you dive into the sea of code and design mockups, this guide will address the real-world challenges of app creation. Think of it as your app survival kit—equipped with everything you need, from validating your idea to navigating app store optimization. With this roadmap, you’ll be prepared to overcome common pitfalls, develop an app people will love, and launch a truly user-friendly, scalable product. Ready to make your app dreams a reality? Let’s get started.

Top Takeaways:

Start with Marketing in Mind: Before jumping into development, think marketing first. Your promotion strategy will dictate crucial app features, integrations, and user acquisition methods, making it the backbone of your app’s success.
Rapid Prototyping Is Key: Build a rapid, interactive prototype to test your app idea early on. This cost-effective step lets you refine user experience based on feedback before investing in full development, speeding up your path to market.
Leverage Continuous Delivery: Embrace continuous delivery to push updates seamlessly. This keeps your app evolving based on real-time user feedback, ensuring you stay competitive while minimizing downtime.

Table of contents:

Custom Mobile App Development – Think Marketing First
8 Steps of How to Create Custom Mobile Applications
Step #1: Know Your Users
Step #2: Build a Rapid Prototype
Step #3: Develop an MVP
Step #4: Make Your App Stand Out
Step #5: Pick a Distribution Model
Step #6: Listen to Your Customers
Step #7: Educate Yourself on App Development Cost
Step #8: Follow Your Users Cross-Platform
Why Choose Topflight as Your Custom Mobile App Development Company?

Custom Mobile App Development – Think Marketing First

How will my app reach customers?
What’s the average CAC (customer acquisition cost) for my app?
What marketing budget do I need to start getting traction?

Companies often leave these questions hanging in the air until the custom mobile app is ready. However, we recommend starting your app journey by answering them. Without users, your app will plummet to the bottom of the app stores.

That’s why first, you need to find out what budget will get you early adopters.

Starting with marketing also makes sense from the technology perspective. How you promote your app will dictate the integrations you’ll need to support.

Will my app need deep linking?
Do I want to include mobile ads?
Do I make content searchable outside the app?

Deep Linking

Deep linking is a technology that has been on the market for a while. Yet, not many companies have embraced it. Put simply, deep linking allows you to bring customers to a specific place in your app where they can get immediate value.

Let’s say you’ve built a recipe app, and a customer taps on your ad of a tuna sandwich recipe. That tap should take her to the app store and once the app downloads, directly to that recipe. That’s the whole purpose of deep links.

Mobile Advertising

Mobile SDKs integrated into your app will let you furnish users with ads that you may offer to turn off with an in-app purchase. That’s a decent revenue model, and there are plenty of services to choose from, e.g., AdMob and AdColony.

Many mobile ads providers supply you with everything you need for deep links too.

Also Explore: Best Telemedicine Apps to Automate your Medical Practice

Make App Content Searchable

Both Apple and Google have tools to index your in-app content, so it becomes available through search. If we continue our example with the recipe app, a search result for make a tuna sandwich could take the user right to this recipe in your app.

Search results linking to apps appear in Google Search (on Android) or Spotlight (on iOS).

8 Steps of How to Create Custom Mobile Applications

Developing a custom mobile application involves a series of strategic steps that ensure your app not only meets user expectations but also stands out in a competitive market. This custom mobile app creation guide will walk you through the essential steps, whether you’re working with an agency or tackling development on your own:

Step #1. Know Your Users: Understand who your ideal users are and what they need from your app.
Step #2. Build a Rapid Prototype: Create a quick prototype to validate your concepts and gather early feedback.
Step #3. Develop an MVP: Focus on building a Minimum Viable Product to test your core features with real users.
Step #4. Make Your App Stand Out: Identify and implement unique features that differentiate your app from the competition.
Step #5. Pick a Distribution Model: Decide how you will distribute your app, whether through app stores or other channels.
Step #6. Listen to Your Customers: Continuously gather and act on user feedback to improve your app.
Step #7. Educate Yourself on App Development Cost: Be aware of the costs involved in app development and plan your budget accordingly.
Step #8. Follow Your Users Cross-Platform: Ensure your app provides a seamless experience across different devices and platforms.

These steps will be explored in detail in the subsequent sections of this custom mobile app building guide, providing you with actionable insights and best practices for each phase of custom mobile app development.

Step #1: Know Your Users

Understanding your users is the cornerstone of successful custom application development. After initiating your app marketing strategy, you need to picture your ideal user. Ask yourself:

Who are my app users?
How often will they use the app?
Is my app’s USP enticing enough?

These questions, along with many others about your target audience, will likely lead to numerous assumptions. It’s your job to challenge these ideas by engaging with people who match your ideal user profile. This step in our guide to create a custom mobile app emphasizes the importance of user research and validation.

To do this effectively, conduct surveys, interviews, and usability tests. Use social media platforms, forums, and focus groups to gather insights directly from potential users. Analyze their pain points, preferences, and behaviors. This process will help you refine your assumptions and build a detailed profile of your ideal app user.

As you collect data, look for patterns and trends that can inform your development decisions. Understand the context in which users will interact with your app. This level of detail is crucial—knowing when and where your app will be used can significantly influence its design and functionality.

By the end of this step, you should have a comprehensive understanding of your target audience. This knowledge will guide every subsequent phase of development, ensuring that your app meets user needs and stands out in a crowded market. Following this approach, as outlined in our guide to create a custom mobile application, sets a strong foundation for success.

Step #2: Build a Rapid Prototype

Now it’s time to really test your assumptions about how the app will serve your target audience. To do that, one of the first steps towards custom mobile app development is an interactive prototype that users can click-through in a browser or on their mobile devices.

An app prototype can be low- or high-fidelity, and its purpose is always to check if you’re creating an engaging experience for your users, which is a critical step in understanding how to build custom mobile applications.

There are plenty of tools to develop a prototype (like Invision or Adobe XD) and to field it with customers (like UserTesting.com or Userbrain).

We wrote at length on rapid prototyping but to give you the gist, its beauty is:

you preserve your development budget while experimenting with UX
it allows you to iterate based on feedback and get to market faster
you can use it to get investors to listen

You might be thinking you need to take everyone’s feedback to heart when developing an app. That’s not true, and doing so can be downright dangerous. If people are shouting for a new feature but they still stick with your app as-is, take comfort. That means they find value in it even without the extra features.

After launching your MVP (more in the next section), you should “measure” and “learn” by listening, but listen to actions more than words. Use feedback as clues, but use data analytics tools to verify them. Analytics such as app metrics and heatmaps allow you to see where people are engaging most on your app and where they’re dropping off.

A measuring strategy which is just as educational is the simple act of watching people use the app. The best custom mobile app development companies know that if users aren’t using something, then they need to get rid of it. If it’s a poor user experience getting in the way of them converting, improve it. Again, with custom mobile app development, the key is to differentiate what users say from how they act, and to be especially careful when it comes to new feature requests. These must be viewed with different lenses than bug reports and complaints about poor user experience. Adding new features more often than not is about increasing an existing user’s lifetime value or expanding the addressable audience size, and not something you should do to placate your initial target market.

Step #3: Develop an MVP

Once you’ve validated the UX, you’re ready to move from a prototype to developing an MVP. The MVP will include just enough features to justify releasing the app into the wild. The feedback that will follow will help you iterate your app further.

Are you ready to build an MVP? First, read our guide to how to hire someone to develop an app.

The most common misconception of first-time entrepreneurs is that they’ll succeed with their business goals because they have a great idea. The truth is, being a successful app entrepreneur or a provider of app solutions is more about having a winning strategy and executing persistently on user feedback than it is about having a great idea. This has been a constant truth in startup circles (read about the “build-measure-learn” cycle). However, we still see too many entrepreneurs commission app development companies to overbuild their MVP.

My advice? Instead of overbuilding, get to market as soon as possible with as few features as possible, test them out with real users, then nimbly make changes based on user feedback. We launch at least 10 production-ready web apps and mobile apps per year, and we can tell you that the “build” of the “build-measure-learn” development cycle is always the easiest part. The harder part is the uncertainty that comes after, where every entrepreneur has to figure out how to stay true to their vision while listening to users and adapting the MVP into something they love

Setup continuous delivery

To get into this mentality of constant change, you need continuous delivery.

Continuous delivery includes tools and methods that allow your app development team to ship updates non-stop. All features and bugs that have been verified automatically become app updates with minimal effort from developers.

As a result, users get to play with new features as soon as they have been tested.

Use competitive technologies

To keep your app evolving, you want to ensure it’s backed by modern technologies that give you an edge. For instance, Android apps used to be developed in Java, but today Kotlin is a clear winner, allowing coders to create Android apps faster.

To make sure your tech stack is competitive:

Glean from your competition by using tools like Appfigures
Use SDKs that boost development of boilerplate features, like authentication
Seek advice from your app developers on native vs. cross-platform vs. PWA

However, it’s also important to select compatible technologies whether that’s python in healthcare or bank level encryption for fintech app development or blockchain for medical apps. For example, let’s talk about incorporating AI. In 2020, there’s no hotter idea than adding artificial intelligence to anything, and with good reason. It’s that rare trend that’s already a clear value-add to everyone on the continuum (unlike say cryptocurrency). If a hospital adds an AI-driven medical scribe, or if a brokerage firm adds an AI-driven financial advisor, the business and the end-users both experience cost savings. However, many entrepreneurs come to us to show their business requirements and their desire for an AI-driven app idea without a clear data acquisition strategy. If you launch an MVP with a freshly-minted AI algorithm, we can pretty much guarantee the algorithm will be unintelligent.

On the other hand, when we talk to entrepreneurs that have a winning strategy to obtain large amounts of de-identified data, we get really excited! And that means, during the initial months of custom mobile application development, the algorithm will be trained with real data so it’s ready to perform by the time we launch the MVP.

A few extra tips on selecting compatible technologies:

See which technologies we’ve used with past clients.

Protect customer data

Whether you’re developing a healthcare app or a social media app like Facebook that shares user data with advertisers, privacy laws are becoming more stringent than ever. With certain industries like Fintech and healthcare (the areas our firm focuses on), liability is higher at the early stages. You need to set up compliance at the early stages, encrypting data in transfer as well as data at rest. Also, most of the smaller startups we worked with had to deal with GDPR compliance in 2018. Protecting personal privacy is now becoming a cost of business for startups, not something that only a handful of big businesses need to deal with.

A few things you should keep on the radar when considering data security:

Privacy legislation knowledge, e.g., HIPAA, GDPR
Using privacy-as-a-service solutions
Adhering to best practices (e.g., data encryption & support for https)

I still remember the days when well-known startups, like the social networking app Path, used an insecure connection to upload user contacts into the cloud. Today, mistakes like that could cost startups a business.

The importance of personal privacy in 2020 doesn’t mean that you need to become a data privacy guru and hire your own Gilfoyle. There are myriad services out there now that help app developers handle privacy and are accessible to entrepreneurial budgets. Example: a few years ago, it cost a whopping $2,000+ per month to become HIPAA compliant on Amazon Web Services. Fast forward to today, and the cost of getting a BAA signed by Amazon for HIPAA compliance is comparable to hosting costs for any other type of app. Look into Privacy-As-A Service platforms like Amazon as a cost of business (like accounting or legal), so that you can remain focused on the only thing you should be focused on day-to-day, which is getting traction.

List of App Development Guides

Buckle in for the long-run, building a mobile app is a journey, not a sprint.

Also Read: How Long Does It Take to Make an App for Android and iOS?

Even though this guide to custom mobile app development provides comprehensive details to get you started, I encourage you to reach out so we can discuss your specific project needs, as MVPs can vary significantly.

Step #4: Make Your App Stand Out

Despite all iterations, there always remain some core features that make your app unique. And there are many ways to make sure your app has them.

Use the full potential of a mobile OS

Successful apps always make the most of the latest features in iOS and Android. Supporting new features helps you smooth out user experience as people hop between system apps and your application.

For example, in Android 10, you can add a seek bar to an audio notification to control playback. Other welcome additions are the dark mode and access to system settings right within your app.

Have you also considered instant experiences that users can access without installing an Android app?

iOS 13 lets you optimize your app for the dark mode and use Apple Sign-in – these are just a few options that your app can benefit from. You may also choose to integrate with Siri or Google Assistant to let users access the app with voice.

Also Read: How to create a cryptocurrency exchange

Integrate with other apps

Another way to beef up your app is to integrate it with third-party apps. That way, users can access your app’s content, e.g., photos, from other apps, or jump straight into your app to perform some action.

For instance, if you are developing an iOS photo editing app, you can make your photo filters available in the native photo app. The idea is to make your app’s main feature accessible from other apps.

Log issues and user actions

As you keep iterating your app, it may help to have logging functionality in place. App logs help identify bugs and expedite the whole QA process. And analytics (like Google Analytics) services give you a decent picture of how people use the app.

Check out our portfolio

Step #5: Pick a Distribution Model

Depending on whether you’re developing an app for the general public or for internal use or even just building a chatbot, it will have a different distribution model. You can develop an app by uploading it to an app store or make it available as a download from your server.

App Store distribution: ASO

One thing you should remember when making your app available via an app store is ASO. App Store Optimization is a huge topic. Let’s just say there are quite a few things that influence your app visibility in the app stores:

screenshots and videos
description and keywords
icon and the name of the app

We’re barely scratching the surface of ASO here. You may opt for one of the app store tracking services, like Sensor Tower or App Annie, to track the competition and execute on your app marketing strategy.

Some of the services for app store analytics will also allow you to A/B test the description and other elements of your app store listing to drive conversions.

In-house app distribution

If the app targets only your employees and doesn’t have a demo account, you can still make the app available via a link.

You will need to procure enterprise licensing for such in-house apps and make sure the app has periodic access to the internet. Plus, you will need to set up an MDM (mobile device management) solution at your place.

Ad-hoc and custom apps

These distribution models are for app testing and for some advanced in-house app management. In 99 percent of the cases, you’ll be distributing your app via an app store.

Step #6: Listen to Your Customers

Once the app is out and people start using it, you need to be ready to handle reviews. It certainly helps if you’ve hooked the app with a user feedback SDK during development. There’s plenty to choose from: Braze, Apptentive, UserVoice.

These platforms help you answer your customers’ concerns before they voice them through app reviews. You can also help customers better understand your product by setting up a knowledge base with one of these solutions.

Step #7: Educate Yourself on Custom Mobile App Development Cost

App development cost, just like ASO, is an intimidating topic. We’ve covered that in detail in a blog post about understanding the true costs of developing an app. Let’s recap what people often miss when budgeting app development:

failure to include a web admin app into the budget
underestimated yearly maintenance cost
overlooked quality assurance

Admin dashboard

For modern custom mobile apps, it’s critical to be always on, serving fresh content to users. If you want to remain in control over the content and users, you need a web interface where you can review flagged content, block certain users, etc.

And by the way, you can use bootstrap admin dashboards to lower the app cost.

Maintenance cost

In our practice, yearly maintenance takes 15 to 25% of the total app cost. That includes fixing any issues with the app, server, hosting, etc. The problems may arise after an external library has been updated.

Testing

We’ve discovered that mobile development teams often ignore QA hours necessary to deliver a customer-ready solution. In that scenario, all testing is carried out by a client who may not be best equipped to catch all issues.

The more use cases an app has, the more mobile app testing it needs. If you have to test yourself, remember that a negative use case is also a use case. Let’s say someone is trying to sign-in with a wrong email and password. What error do you show?

Do you let them know there’s no such email? Do you offer to restore a password?

Testing all of that tends to add up.

Some additional tips on getting to know your numbers:

Learn from the mistakes of a fellow developer.
To keep yourself on track and don’t waste any time (or money) doing the same job twice, it’s essential to understand how to make a custom mobile app that aligns with your budget and technical requirements.
Review one of our favourite projects to get the low down on competitor stats.

Consider some cost-savings alternatives, like building an SPA (single page application).

Step #8: Follow Your Users Cross-Platform

Have you noticed anything particular about apps that become popular? How they become available on smartwatches, tablets, TVs, and other devices? I think it’s safe to say that this tendency has become everybody’s expectation these days:

My app should follow me to every device I use.

Look at the Continuity feature in the Apple ecosystem: you start a document on an iPhone and pick it up on a Mac or iPad.

As soon as your app starts getting some traction, we recommend building separate versions of the app that support those other devices. Make sure to include only those features that make sense on each particular platform. When planning to expand, it’s crucial to create a custom mobile app that can seamlessly transition across different platforms, ensuring a consistent user experience.

There’s no use in a calendar app on Apple Watch if you expect the user to add events on a tiny interface. However, calendar notifications and even agendas make total sense.

Also Read: A Guide to App Store Optimization for Mobile Apps

Why Choose Topflight as Your Custom Mobile App Development Company?

Choosing the right partner for your custom mobile app development can make the difference between a successful launch and a project that falls short. Here’s why Topflight stands out as the ideal choice:

Deep Expertise in Healthcare and Fintech: Our team excels in healthcare, mastering interoperability, EHR integrations, and integrating with legacy solutions. We also offer from-scratch development and have substantial experience in the fintech sector.
AI Solutions in Healthcare: We leverage cutting-edge AI technologies, including Generative AI, Computer Vision, OCR, and general ML data analysis, to create innovative solutions that elevate the healthcare experience for patients, providers, and admin staff.
Medical IoT Solutions: We have hands-on experience in developing connected apps for the medical Internet of Things (IoT), ensuring seamless integration and functionality.
In-House AI Software Development Framework: Our proprietary specode.ai framework allows us to ship healthcare prototypes rapidly and cost-effectively. We automate various aspects of the development process, from spec writing to coding and testing, while maintaining meaningful human oversight.
Proactive Approach: Unlike others, we are committed to helping you achieve real business traction. We iterate towards optimal product-market fit, adapting your original vision to meet real-world demands swiftly.

Additional Strengths from Topflight

Rapid Prototyping: We transform your ideas into high-fidelity clickable prototypes, facilitating early validation and investor pitches.
Agile Development: Our agile methodology ensures quick time-to-market while maximizing user feedback to shape your product effectively.
Comprehensive EHR Integration: From data flow diagrams to integration design, we provide a thorough roadmap for seamless EHR integration.
Proven Track Record: Our apps have raised over $200 million and reached 50 million users, reflecting our capability to deliver successful projects.
Dedicated Team: Our team comprises experienced professionals, including ex-founders and top-tier developers, who are deeply committed to your project’s success.

When considering how to create custom mobile applications that truly make an impact, Topflight stands unparalleled as a partner. Our combination of expertise, innovative frameworks, and a proactive, iterative approach ensures your app not only meets but exceeds expectations.

Got Questions?

What you’ve read is an outline that will get you through major pitfalls of developing a mobile app. What should you expect when you actually start your app project? A myriad of nuances. Let’s say you are thinking about developing a mental health app:

Should we support voice control to get user attention off the screen?
What SDK should we pick for video calls?
Should we optimize UI for seniors?

Questions like these start accumulating pretty fast. How about we start answering them together today?

[This blog was originally published in July 2020, but has been updated for relevance]

Frequently Asked Questions

What services and tools can you recommend?

Here are a few tools and services to get you started. App Annie and SensorTower for researching your competition; Branch and AppsFlyer for in-app marketing (deep linking, attribution, in-app analytics); AdMob and MoPub for serving ads in your app; TapStream to analyze user engagement; MixPanel and Localytics to understand user behavior.

How can I test an app prototype once it's built?

We recommend UserTesting, UserZoom, or PlaybookUX. These user testing platforms allow you to define various user criteria and test the prototype with your target audience.

Does Apple allow publishing an app to the App Store if only registered and authenticated users can access its features, and registration happens outside the app?

Yes, but you should enable a demo mode to let unregistered users explore the app’s features. Alternatively, you can opt for an ad-hoc distribution model that allows you to make the app available outside the App Store.

How do I minimize the damage from negative reviews in the app stores?

Besides offering your customers a smooth and glitch-free in-app experience, consider integrating the app with services like Apptentive or UserVoice. These tools offer an easy way to provide support to users inside the app and work as a database for all negative user reviews.

What are the most often overlooked app development cost factors?

App owners often miss to factor in such things as a web admin application used to manage content inside the app and maintenance costs.

Joe Tuan