How much does it cost to develop a mobile app?

A professional cross-platform MVP with a backend typically runs from the tens of thousands of dollars into six figures, over roughly three to six months, depending on complexity, integrations, and AI requirements. Real-time features, video, or regulated data push costs higher. Budget roughly 15–20% of the build cost per year for maintenance, OS updates, and infrastructure.

Should I build a native app or cross-platform?

For most business and consumer apps, cross-platform (Flutter or React Native) is the economically correct default: one codebase for iPhone and Android with near-native experience. Choose native when you need extreme graphics performance, deep hardware access, or day-one support for new OS features.

What is an MVP and why start with one?

An MVP (minimum viable product) is a lean first version containing only the core that solves the user's problem. It launches in a few months and gets tested against real users, so your budget produces learning instead of guesses — and investors prefer a live app with users over a pitch deck.

How much does it cost to build a companion app for a hardware product?

A BLE companion app — pairing, device control, live data, and firmware update delivery — is typically comparable to a mid-complexity consumer app, with added engineering for connection reliability, onboarding, and hardware compatibility testing. Building the app and the device firmware with one coordinated team significantly reduces integration cost and risk.

Do I need both an iOS and an Android app at launch?

With cross-platform frameworks the marginal cost of the second platform is small, so most products launch on both. If budget forces a choice, launch where your audience is: US consumer products often see stronger early iOS revenue, while some device categories and markets skew Android. A companion app for hardware generally needs both from day one.

App Development Services — Mobile Apps, Companion Apps, and MVPs for Founders

Q: How do apps make money?

The dominant models are subscriptions, freemium upgrades, in-app purchases, advertising (only at large scale), and B2B licensing. Pick the model before development starts — it shapes the architecture, the analytics you need, and even which app-store rules apply to you.

From "I Have an App Idea" to an App That Earns

Almost everyone has an idea for an app. But between the idea and a working product in the App Store and Google Play — with real users and a revenue model — stand questions many founders don't even know to ask: Which technology stack? What does it really cost? What gets built first and what waits for version two? And how do you add AI features without burning the budget? This guide brings order to modern app development from the practical viewpoint of a founder — whether your app is a standalone product or the companion to a physical device.

Native or Cross-Platform? The First Decision

Your app needs to run on both iPhone and Android, and building each platform separately (Swift for iOS, Kotlin for Android) nearly doubles the cost. That is why most new apps today are built with cross-platform frameworks — Flutter from Google or React Native from Meta — that deliver one codebase for both platforms with a user experience most people cannot tell apart from native.

When is true native worth it? When you need extreme graphics performance, deep access to device hardware, or day-one support for brand-new OS capabilities. For the large majority of business and consumer apps, cross-platform is the economically correct default — and in some cases a progressive web app (PWA) skips the app stores entirely. These architecture calls sit inside the broader discipline of custom software development for products.

MVP First, Everything Else Later

The most expensive founder mistake is spending a year building the "perfect app" — and then discovering the market wants something different. The right approach is an MVP (minimum viable product): a lean first version containing only the core that solves the problem, launched in a few months and tested against real users. Every additional feature earns its place only after usage data proves it is needed. That way your budget buys learning instead of guesses — and investors strongly prefer a live app with users over a slide deck. This discipline matters most for an early-stage startup, and a working MVP is the most convincing asset you can bring into fundraising.

Companion Apps: When the App Is Half of a Hardware Product

A growing share of app projects are not standalone at all — they are the face of a physical product: the app that pairs with a wearable over Bluetooth Low Energy, provisions a smart home device onto Wi-Fi, shows live sensor data in charts, and pushes firmware updates to the device. Companion app development has its own rules: BLE connection management and permissions, pairing and onboarding flows that ordinary users can actually complete, offline behavior when the device is out of range, and backward compatibility as new hardware generations ship. Because the app, the device firmware, and the cloud must be designed as one system, this work belongs with a team that understands hardware as well as software.

AI Features: What Users Now Expect

Smart features are no longer a bonus — they are a baseline expectation: an assistant that answers questions, automatic summarization and transcription, personalized recommendations, image understanding. The good news: you do not need to train a model from scratch. Apps integrate leading language-model APIs, or run compact models on the device for privacy and speed. The important news: AI features demand cost planning (every model call costs money), privacy-by-design, and guardrails that prevent wrong answers in sensitive places. These are exactly the decisions an experienced development partner gets right the first time.

Behind the Scenes: Backend, Cloud, and Security

Almost every serious app needs a server side: user accounts, a database, push notifications, and business logic. The standard today is managed cloud infrastructure (AWS, Google Cloud, Azure) or backend-as-a-service platforms that dramatically shorten development. At the same time, obligations are rising: state privacy laws such as the CCPA, GDPR for European users, COPPA when children are involved, and accessibility expectations under the ADA and WCAG. It is far cheaper to build an accessible, secure app than to retrofit one.

How Do Apps Make Money?

The revenue model should be chosen before a single line of code, because it shapes the architecture:

Subscription — the dominant model today: monthly or annual payment for ongoing value.
Freemium — a free tier with paid advanced features; great for growth, risky without a genuinely sticky core.
In-app purchases — common in games and content apps.
Advertising — only viable at very large user volumes.
B2B / licensing — selling the app as a service to businesses, often the most profitable route for a solo founder.

Keep in mind that Apple and Google take a commission on store payments, though regulatory shifts are gradually opening alternative payment paths.

How App Development Works at Projects House

Discovery workshop. Together we define the problem, the audience, the revenue model, and the features that are truly critical for version one.
UX/UI design and clickable prototype. Interactive screens you can tap through before development starts, validated with real users.
MVP development. Sprint-based delivery with working interim builds, including backend, security, and accessibility.
QA and store launch. Testing across devices, meeting Apple and Google review requirements, and shepherding the app through approval.
Measure and improve. Analytics instrumentation, user-behavior insight, and a joint roadmap for the versions that follow — the same iterative philosophy behind every idea-to-product journey.

The Bottom Line

Building an app is more accessible than ever — which means the fight for user attention is harder than ever. What separates a successful app from another forgotten icon is not feature count but strategy: a focused MVP, technology matched to the budget, smart AI integration, and a revenue model designed from the foundation. Projects House guides founders and businesses the whole way — from first specification to a live, earning app in the stores.

Dreaming about an app — standalone or as a companion to your hardware product? Reach out through our contact form, tell us about the idea, and we will map the fastest realistic path to launch.

App Development: Mobile and Web Apps That Turn Ideas Into Revenue