How to Build the Same Game for iOS and Android Without Double Work

Building a mobile game for one platform is hard enough. Building it twice — once for iOS, once for Android — is a mistake most small teams cannot afford. The mobile gaming market generated over $82 billion in revenue across both stores in 2025, according to data compiled by Sensor Tower and reported by 80.lv. The Apple App Store alone accounted for $52.5 billion of that, while Google Play contributed roughly $30 billion. Skipping either platform means leaving real revenue on the table.

The good news is that you no longer need two separate projects. Modern cross-platform engines compile one game into both iOS and Android builds. This guide explains how that works, which tools make it practical, and what to watch out for along the way.

Why cross-platform is the default for indie mobile games#

The argument for building one game that runs on both platforms is simple: more players, more revenue, and no duplicated effort. According to Grand View Research, the global mobile gaming market is projected to grow from $139 billion in 2024 to $256 billion by 2030. Most of those players own either an iPhone or an Android device, and many switch between both.

Building for one platform first and porting later almost always takes longer than building for both from the start.

The cost difference is small if you plan for it. Google Play charges a one-time $25 developer registration fee. Apple's developer program costs $99 per year. Both platforms take a commission of 15 to 30 percent on paid downloads and in-app purchases, with reduced rates for smaller developers. If your game earns anything at all, the store fees pay for themselves quickly.

When single-platform still makes sense#

There are exceptions where targeting one store first is reasonable:

• You need a platform-exclusive feature, such as Apple Arcade integration
• Your team has no access to a Mac for Xcode builds
• You are testing a prototype with a small audience before committing to a wider release

In those cases, choose one platform, validate your game, then expand. Just do not treat the second platform as a separate project.

How cross-platform engines actually work#

A cross-platform game engine works like a translator. You build your game once — scenes, logic, art, audio — inside the editor. When you are ready to publish, the engine compiles that project into a platform-specific package: an IPA file for iOS and an AAB or APK file for Android.

Your game logic and assets stay identical across both builds. The engine handles the differences under the hood: input systems, rendering backends, audio formats, and file access patterns. This is the same approach described in our guide to choosing the right game engine, where the ability to export from one project to multiple targets was a key deciding factor.

What stays the same and what changes#

Layer	Same on both platforms?	Notes
Game logic	Yes	Your rules, events, and systems are identical
Art and sprites	Yes	Asset files are shared
Audio	Yes	Engines convert formats during export
Input handling	Mostly	Engines abstract touch, but test gesture differences
Screen resolution	No	iOS has fewer device sizes; Android varies widely
Store packaging	No	IPA for Apple, AAB for Google
Signing and certificates	No	Different process for each store

Understanding which parts change and which do not is the key to avoiding double work.

Choosing the right engine for cross-platform mobile#

Not every engine handles mobile export equally well. Here is how the main options compare in 2026.

Unity#

Unity is the most widely used engine for mobile games. It supports iOS and Android export from a single project with mature tooling. The platform handles screen resolution scaling, input abstraction, and plugin integration for both stores. The trade-off is that Unity's pricing model changed significantly in recent years, and the editor can feel heavy for small 2D projects.

Godot#

Godot is a free, open-source engine that supports mobile export. Its 2D workflow is well-regarded, and the lightweight editor runs on almost any machine. Mobile export requires additional setup steps, especially for iOS where you need to configure Xcode manually. For a deeper comparison, see our Godot vs Unity breakdown.

Egmatic#

Egmatic is built specifically for creators who want a visual, node-based workflow with one-click publishing. You design scenes and connect logic visually, then publish to iOS, Android, Windows, macOS, and Linux from the same project. No separate build configurations, no manual export steps. This is the simplest path for developers who want to focus on their game instead of build pipelines.

Quick engine comparison#

Feature	Unity	Godot	Egmatic
License	Subscription	Free (MIT)	Freemium
2D workflow	Good	Excellent	Visual, node-based
Mobile export	Mature	Supported, manual setup	One-click
Learning curve	Steep	Moderate	Low
Code required	C#	GDScript or C#	None
Target platforms	All major	All major	All major

Platform differences that affect your game#

Even with a shared codebase, iOS and Android are not identical. These differences matter during development, not just during publishing.

Screen sizes and resolutions#

iOS devices come in a manageable number of screen sizes. The iPhone lineup ranges from roughly 375 to 430 logical pixels wide, and iPads follow predictable breakpoints. Android devices span a much wider range, from budget phones with 320-pixel-wide screens to flagship devices with 480 pixels or more.

Design your UI with flexible layouts from the start. Anchor elements to screen edges, use relative sizing, and test on at least three Android devices: a small budget phone, a mid-range device, and a flagship.

Performance variation#

iOS hardware is consistent. If your game runs well on the oldest iPhone you support, it will likely run well on newer ones. Android is different. A $100 phone and a $1,200 phone share the same store, and your game needs to be playable on both.

Build for the weakest device you intend to support, then add visual enhancements for faster hardware.

Most engines let you create quality presets per platform or per device tier. Use them.

Touch input differences#

Both platforms use touch, but iOS and Android handle gestures slightly differently. iOS has consistent haptic feedback and predictable multi-touch behavior across all devices. Android gesture handling varies by manufacturer and Android version.

Test common interactions on both platforms: dragging, pinching, multi-finger taps, and long presses. If your game uses complex gestures, consider simplifying them to single-tap and swipe.

Store policies and review process#

Apple's App Store review tends to be stricter about UI guidelines, privacy, and metadata completeness. Google Play review is faster on average but has its own requirements around content ratings, data safety declarations, and target API levels. Both stores reject apps that crash on launch, so stability testing is non-negotiable.

Step-by-step: Build once, publish to both#

Here is a practical workflow for getting your game onto both stores without doubling your effort.

1. Plan for both platforms from day one#

Before you build anything, make sure your engine supports both iOS and Android export. Set up your project with flexible UI layouts and test on multiple screen sizes early. Choose an aspect ratio strategy: letterbox, stretch, or adaptive layout.

2. Develop your game in one project#

Build your game as you normally would. Use the engine's input abstraction layer instead of platform-specific APIs. Keep your UI responsive and test on both platforms regularly, not just at the end.

For a refresher on building games without writing code, see our no-code 2D game guide.

3. Set up store accounts early#

Register for both the Apple Developer Program ($99/year) and Google Play Console ($25 one-time). Do this before you are ready to publish, because approval can take a few days. Prepare your store listings: app descriptions, screenshots, icons, privacy policy URLs, and content ratings.

4. Export and test platform builds#

Generate builds for both platforms. Test the iOS build on a physical iPhone or iPad. Test the Android build on at least two devices with different screen sizes and performance levels. Run each build through its own release checklist:

Check	iOS	Android
App launches without crash	Required	Required
Touch input works correctly	Required	Required
UI scales to screen size	Required	Required
Audio plays correctly	Required	Required
Store metadata is complete	Required	Required
Privacy policy linked	Required	Required
Permissions justified	App Store review	Data safety form

5. Submit to both stores#

Upload your iOS build through App Store Connect and your Android build through the Google Play Console. Fill out all metadata fields, upload screenshots at the required resolutions, and submit for review. Apple review typically takes 24 to 48 hours for new apps. Google review is usually faster but can vary.

6. Monitor and update both versions together#

After launch, treat both versions as one product. When you fix a bug or add a feature, update both builds from the same project and submit to both stores simultaneously. This is where the single-project approach saves the most time.

Common mistakes that create double work anyway#

Even with a cross-platform engine, some mistakes force you to maintain separate versions.

Hardcoding screen dimensions#

If your UI layout assumes a specific screen size, it will break on one platform. Always use relative positioning and test on both small and large screens.

Using platform-specific plugins without a fallback#

Some plugins only work on iOS or only on Android. If your game depends on one, you will need a separate implementation for the other platform. Check plugin compatibility before you build systems around them.

Ignoring store requirements until the end#

Filling out store listings, privacy policies, and content ratings takes time. If you wait until your game is finished, you will face a frustrating delay. Start preparing store assets while your game is still in development.

Testing on only one platform#

It is tempting to develop entirely on one platform and export to the other at the last minute. This almost always reveals surprises: layout bugs, performance problems, input quirks, or missing assets. Test on both platforms every week, not just before release.

Not budgeting for both store fees#

The combined cost of Apple and Google developer accounts is modest — $124 for the first year and $99 per year after that — but it is an expense you should plan for upfront, especially if you are building multiple games.

Conclusion#

You can build one game and publish it on both iOS and Android without maintaining separate projects or writing platform-specific code. The key is choosing a cross-platform engine early, designing for screen variation from the start, and testing on both platforms throughout development. Tools like Egmatic simplify this further by handling the build and export steps for you, so you can focus on making your game good instead of making it compile for each store. Start with one project, test on both platforms, and publish everywhere your players are.