Jean WillameJean WillameiOS & Android apps

Your iOS and Android app,from mockup to the stores.

Jean Willame

Building mobile apps is my day-to-day, in Swift, Kotlin or React Native depending on the project. I also take care of what comes after the code: Apple review, store listings, subscriptions, updates.

See my apps →
18,078 downloads in under a year across our 14x apps$2,500 in revenue, $400 MRRSwift, Kotlin, React Native

They trust me

HyperstackMatchersUncode School

Apps in production

How it works

1

Scoping

30 min

We spend 30 minutes on the app you have in mind: who will use it, what already exists on your side (APIs, SSO, design system, security constraints) and what needs to ship first. If I'm not the right person, I'll tell you.

2

Prototype

A few days

I quickly put together a first version that runs on a real phone. We test the main flow before writing the rest, because that's where you find out what doesn't work.

3

Build

Depends on scope

Native or React Native, depending on what the app has to do. You get TestFlight and Play Console builds along the way, so you watch the app take shape on your own phone.

4

Release & support

After launch

I handle the App Store and Google Play submission, the store listings and the review feedback. After launch, I stay on crashes and updates.

My values

✓

Quality

Until you're satisfied, we keep going. That means scoping the project well from day one.

☎

Availability

Available 7 days a week on WhatsApp for emergencies, questions, doubts. I respond fast.

⚡

Speed

Better to make a quick mistake and iterate than spend 3 weeks on a document. Fast results, immediate visibility.

Frequently asked questions

Native or React Native?
It depends on the app. If it relies on the phone's hardware (camera, Bluetooth, GPS, on-device ML), I go native with Swift and Kotlin. If it has to reach both stores fast from one codebase, React Native with Expo does the job well. I've shipped both to production, so the choice comes down to your case.
How long until a first version?
My co-founder and I shipped Pod in 2 days and Cura in 3. A company app with internal APIs and security requirements takes more like a few weeks. We set the scope together on the first call.
Do you handle the store release?
Yes: App Store and Google Play submission, store listings, screenshots, answers to review rejections. We even built our own tools for it, an agent that checks the app against Apple's 135 guidelines before submitting and an extension that publishes an update in 5 minutes.
Who owns the code and the accounts?
You do. The app is published on your Apple and Google developer accounts, and the code lives in your repository. If you don't have accounts yet, I'll help you set them up.

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Analysis and field notes on automation, AI agents and operations.

Got an app in mind?

Let's talk for 30 minutes. I'll tell you how I'd approach it and how long it would take.