Rob Mulder, Senior Native Mobile Developer

Rob Mulder

Senior Native Mobile Developer

NL EN

Available now for new projects.

Sweather

My own weather app for athletes. iOS, Android and backend, built by me.

Specification

PLATFORMS
Native iOS in Swift and SwiftUI, native Android in Kotlin with Jetpack Compose
BACKEND
One Python backend pulls the weather sources and computes a score per sport
SPORTS
47 sports, the score moves with the weather in real time
STORES
Live in the App Store and on Google Play, both published by me

Sweather is my own product, not client work. I wrote the iOS app in SwiftUI, the Android app in Kotlin with Jetpack Compose and the Python backend that feeds both, from first concept to both stores. That is the proof behind "iOS, Android and the backend from one pair of hands": no team, no handover.

See Sweather

Does Sweather say anything about your project?

You just want to use the app
PickGet it from the App Store or Google Play
WhyLive in both stores, the same score across 47 sports on iOS and on Android.
You need one developer for iOS and Android
PickSweather is the proof The pointThis is why it is on this site.
WhyBoth apps are native, written by the same person, with no cross-platform layer in between.
You need the app plus the backend
PickSame pair of hands
WhyThe Python backend that feeds both apps is mine, so there is no handover between parties.
You want proof at scale, millions of users
PickLook at CoronaMelder and the NOS app
WhySweather shows the full stack, the client work shows the volume. Two different kinds of proof.
You want one cross-platform app in Flutter or React Native
PickAnother developer fits you better
WhySweather is deliberately two native apps. I build native, that is the choice behind this product.

Proof, not a promise

Live in the App Store
DetailSweather, app id 6759922923. Native iOS in Swift and SwiftUI.
Source: App Store
Live on Google Play
Detailcom.robmulder.sweather. Native Android in Kotlin with Jetpack Compose.
Source: Google Play
47 sports get a real-time score
DetailOne Python backend pulls the weather sources and computes a score per sport.
Source: getsweather.com
Not a one off: changemonitor.io runs on the same setup
DetailAnother own product, native on iOS and Android, also built end to end.
Source: changemonitor.io

Available now.

A reply within one business day, not weeks of silence.

Discuss your project

You send one email. I reply within one working day. No sales funnel, no bots.

Sheet revised 2026-09-29. Every figure on this page can be checked through the sources above.