Native Android apps
Kotlin from day one. Apps that run smoothly on modest hardware.
Android development, done right
Launch Android apps that live only on your phone
We build offline‑first Android apps in Kotlin and Jetpack Compose. No trackers, no advertising IDs, no hidden code after install.
- Pure Android
- Offline first
- No ad IDs
Pure Android
Offline first
No ad IDs
Our services
Full‑cycle Android development, from concept to maintenance.
Compose interfaces
Declarative UI with Material 3, adaptive layouts and refined motion.
Offline data
Room and DataStore keep everything local, so the app works anywhere.
Battery & performance
We profile start‑up, jank and background work, then monitor Android Vitals.
Accessibility
TalkBack labels, high contrast and large‑text support are built in.
Long‑term care
Signed builds, staged Play rollouts and regular updates.
- Pure Android
- Kotlin
- Jetpack Compose
- Offline first
- Accessibility
- Privacy by design
0trackers in our apps
100%of app data kept on the device
1platform we build for
How it works
Sushi Belt
Sushi Belt follows our core rules: native Android, instant launch, no data leaves the device.
- Operates without network
- Stores data locally on the device
- Requests only needed permissions
- No accounts, ads, or analytics SDKs
Clear terms
What we do
What we never do
Build native Android apps in Kotlin
Sell or share personal data
Keep user data on the device
Add advertising IDs or tracking SDKs
Explain every permission in plain language
Hide behaviour behind vague policies
Support the app after release
Ship features nobody asked for
Our stack
Reliable, well‑supported tools that are easy to hand over.
Kotlin
Concise, null‑safe code that is easy to review.
Coroutines & Flow
Background work and state management without callback chaos.
Jetpack Compose
Declarative screens that adapt to phones and tablets.
Room
Typed local database for offline storage.
WorkManager
Reliable background jobs that respect battery limits.
Hilt
Dependency injection that keeps modules testable.
Baseline Profiles
Repeatable builds and checks on every change.
Play Console
Staged rollouts, vitals and release tracking.
Our process
A clear path from idea to released app.
Discovery
We define the problem, target users and any forbidden behaviours.
Architecture
We map screens, data flow and permissions before writing code.
Build
Kotlin, Compose and tests delivered in small installable builds.
Release & care
Staged Play rollout, monitoring, fixes and updates for new Android versions.
One-way data flow: the interface observes state, and the repository owns the data.
Ground rules
What we never compromise on.
0trackers in our apps
0advertising IDs used
100%of app data kept on the device
1platform we build for
Zero tracking
We add no analytics, ad SDKs or fingerprinting.
On‑device first
All data is processed and stored on the phone.
Battery discipline
We treat background work as a cost and measure it.
Accessible UI
Screens work with TalkBack, large text and proper contrast.
Common questions
Brief answers about our work.
What does scieparval.com do?
We design, build and maintain native Android apps focused on offline use and privacy.
Which platforms do you support?
Android only. We dive deep into one platform.
What do you do with user data?
Our apps keep data on the device. No analytics, no ad SDKs, no data sales.
How can I contact you?
Email fabien.fddelaunay@gmail.com or use the contact form on this page.
Do you support apps after release?
Yes. We provide fixes, adapt to new Android versions and keep dependencies current.
Studio details
scieparval.com is an Android development studio. Meet the team behind the apps.
- Companyscieparval.com
- Address2 ROUTE DE JAURE, 24190 VALLEREUIL
- Phone+48732607860
- Websitescieparval.com
Get in touch
Tell us about your project. Your email app opens with a prepared message.
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 each app’s full policy below.
- No personal data collected
- No advertising ID
- Delete the app, delete your data
Privacy policies