Battery discipline
We treat background work as a cost and measure it.
Android development, done right
Hand‑crafted Android apps, not ports
FORTUS (HARPER FRANCE TRADE COM) is a native Android studio: Kotlin, Jetpack Compose, and apps that run without a network connection.
- Works offline
- Built for Android
- No ad identifiers
0trackers in our apps
100%of app data kept on the device
1platform we build for
Where we don’t compromise
Four rules we keep, no matter the project.
On‑device by default
Your data stays on the phone.
Zero tracking by design
We add no analytics, ad SDKs or fingerprinting.
Accessible interfaces
Screens work with TalkBack, large text and sensible contrast.
- Kotlin
- Privacy‑first
- Android‑native
- Offline‑first
- Jetpack Compose
- Accessible
What we build
Full‑cycle native Android work, from sketch to release, with the boring bits done right.
Offline data handling
Room and DataStore store everything locally, so the app works on a plane or in a tunnel.
Accessibility built‑in
TalkBack labels, readable contrast and large‑text support are part of the code, not an afterthought.
Battery and performance
We profile start‑up, jank and background work, then watch Android Vitals after each release.
Native Android apps
Kotlin from day one. Apps that feel at home on Android devices, even modest ones.
Compose interfaces
Declarative UI with Material 3, adaptive layouts and smooth motion.
Release & long‑term care
Signed builds, staged rollouts on Google Play and steady updates as Android evolves.
31%Status
Detail
In practice
Wood Turner
Wood Turner follows the same rules as every app we ship: native Android, fast launch, no data leaves the device.
- No accounts, ads, or analytics SDKs
- Keeps data in local storage
- Requests only needed permissions
- Operates without a network
Our process
Four steps from first call to long‑term care. Each step leaves you with something tangible.
Discovery
We define the problem, the users and the boundaries of the app.
Architecture
We sketch screens, data flow and permissions before writing production code.
Build
Kotlin, Compose and tests, delivered in small builds you can install and try.
Release & care
Staged rollout on Google Play, then monitoring, fixes and updates for new Android versions.
Technology
A modest toolbox that keeps apps easy to maintain.
Kotlin
Concise, null‑safe code that is easy to review.
Coroutines & Flow
Background work and state without callback tangles.
Jetpack Compose
Declarative screens that adapt to phones and tablets.
Room
A typed local database for offline data.
Android Vitals
Staged rollouts, vitals and release tracking.
Gradle CI/CD
Repeatable builds and checks on every change.
WorkManager
Reliable background jobs that respect battery limits.
Hilt
Dependency injection that keeps modules testable.
Questions, answered
A few things people usually ask first.
What do you do with user data?
Our apps keep data on the device. We do not run analytics or ad SDKs, and we do not sell data.
What does FORTUS (HARPER FRANCE TRADE COM) do?
We build and maintain Android apps end‑to‑end, with offline use and privacy as defaults.
Do you support apps after release?
Yes. We ship fixes, adapt to new Android versions and keep dependencies current.
How can I contact you?
Write to eulalie8garnier@gmail.com or use the contact form on this page.
Which platforms do you support?
Android only. We go deep on one platform instead of spreading thin.
In plain words
What we do
- Keep user data on the device
- Explain every permission in plain language
- Support what we ship after release
- Build native Android apps in Kotlin
What we never do
- Sell or share personal data
- Add advertising IDs or tracking SDKs
- Hide behaviour behind vague policies
- Ship features nobody asked for
Company details
FORTUS (HARPER FRANCE TRADE COM) builds the apps on this page. Here are the details behind the studio.
- CompanyFORTUS (HARPER FRANCE TRADE COM)
- DUNS263865817
- AddressHARPER FRANCE TRADE COM, 57 AVENUE MICHELET, 93400 SAINT-OUEN-SUR-SEINE
- Phone+48794491686
- Websitefortushar.com
Start a conversation
Send a short note about your project — your email app does the rest.
Privacy, in short
Our apps collect no personal data, use no advertising ID and include no third‑party trackers. Everything stays on your device. Read the full policy for each app below.
- No personal data collected
- No advertising ID
- Delete the app, delete your data
Privacy policies