Best Cross-Platform App Developers

Updated 2026-10-02

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Cross-platform developers build one app that runs on both iPhone and Android, usually with Flutter or React Native. It can save time and money compared with two separate native apps. Projects go wrong when the app feels clumsy on one platform, device features do not work as expected, or the scope keeps growing. This guide helps you hire a developer who delivers on both stores.

We are finalizing our shortlist for this service. Until then, the guide below walks you through how to evaluate sellers yourself.

Browse all Cross-platform Apps gigs on Fiverr →

What a good cross-platform package includes

Check that the offer clearly states:

Framework and why it fits your app.
Screens and features, listed one by one.
Platforms and versions supported.
Device features such as camera, location or payments.
Testing on real iOS and Android devices.
Store submission for both stores.
Source code handover, revisions and timeline.

Ask for test builds on both platforms at each milestone, not just at the end. Problems that appear only on one system are easier to fix early.

Ask to install one of the developer's previous apps on both an iPhone and an Android phone. Compare scrolling, buttons, text size and how the app asks for permissions. Small differences show how much care the developer takes with each platform rather than only one.

How to brief a cross-platform developer

The app's purpose and target users.
Core features for version one.
Designs or wireframes, if available.
Device features and integrations you need.
Which platform matters most to your users.
Budget range and deadline.
Plans for updates after launch.

Tell the developer if some features are only needed on one platform. It affects how the app is structured and saves rework later.

Plan for maintenance. Operating systems and frameworks update every year, and apps need small fixes to keep working. Ask what ongoing support costs before you commit.

Ask how the developer handles framework updates and plugin problems. Cross-platform apps depend on community plugins for many device features, and a plugin that stops being maintained can block an update. Experienced developers choose well-supported plugins and know how to replace one if needed.

What drives the price

number of screens and features
device features and plugins
backend, login and payment work
custom animations and design
testing on many devices
publishing to both stores

Simple apps with standard screens cost much less than apps with real-time features, complex offline sync or custom hardware integration.

Red flags

Only tested on an emulator, not real devices.
Apps published under the developer's accounts.
No experience with the device features you need.
One huge payment upfront with no milestones.
No plan for updating the framework later.

Keep your own copy of the code in a repository you control, and make sure you can build the app yourself or with another developer if needed.

Need iPhone only? Read our iOS developer guide. For the backend or web version, see our full stack web app guide and app design guide.

Prepare both store listings in parallel. Apple and Google ask for different screenshots, descriptions and privacy information, and their reviews work differently. Allow time for both, so a delay in one store does not hold back the launch you have announced to your users.

Quick pre-order checklist

I know which device features I need.
Both platforms will be tested on real phones.
The apps will be in my own store accounts.
Payments follow milestones.
I will receive the full source code.

FAQ

Flutter or React Native?

Both are mature and widely used. The developer's experience matters more than the framework. Ask which they recommend for your app and why.

Will the app feel native?

A good developer follows each platform's conventions where it matters, such as navigation and permissions. Test on both an iPhone and an Android phone.

Can it use the camera, GPS and notifications?

Usually yes, through plugins. Ask the developer to confirm each device feature you need before you start.

Who publishes to the app stores?

Use your own Apple and Google developer accounts so you keep control. The developer can upload builds with team access.

Is it really cheaper than two native apps?

Often, because most code is shared. Platform-specific work, testing on both systems and store reviews still take time.