Native Android tools
Kotlin from day one. Apps that feel at home on any Android device.
Android workshop
We create focused Android utilities, but never send your data elsewhere
At reteceli.com we design offline‑first Android tools with Kotlin and Jetpack Compose. No trackers, no advertising IDs, no hidden surprises after install.
- Pure Android
- Works offline
- No ad IDs
Our craft
From sketch to release we build native Android tools and handle the routine bits with care.
Compose UI
Declarative screens with Material 3, adaptive layouts and smooth motion.
Local‑first data
Room and DataStore store everything on the device, so the app works anywhere.
Battery & performance
We profile start‑up, jank and background work, then monitor Android Vitals after each release.
Accessibility built‑in
TalkBack labels, high contrast and large‑text support are included from the start.
Long‑term care
Signed builds, staged rollouts on Google Play and regular updates as Android evolves.
Our workflow
Four clear steps from the first call to ongoing support. Each step leaves you with something tangible.
Discovery
We define the problem, the users and the boundaries of the app.
Architecture
We draft screens, data flow and permissions before any 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.
One-way data flow: the interface observes state, and the repository owns the data.
12:30
Streak7
Week
Anvilworks
Anvilworks
Anvilworks follows our own recipe: native, quick to open and quiet about your data.
- Runs without internet
- Stores data locally on your device
- Requests only needed permissions
- No accounts, no ads, no analytics
Trusted toolbox
A lean set of tools that keeps our apps simple to maintain.
Kotlin
Kotlin – concise, null‑safe code that is easy to review.
Coroutines & Flow
Coroutines & Flow – background work and state without callback chaos.
Jetpack Compose
Jetpack Compose – declarative UI that adapts to phones and tablets.
Room
Room – typed local database for offline storage.
WorkManager
WorkManager – reliable background jobs that respect battery limits.
Hilt
Hilt – dependency injection that keeps modules testable.
Gradle CI/CD
Gradle CI/CD – repeatable builds and checks on every change.
Play Console
Play Console – staged rollouts, vitals and release tracking.
Our pledge
Four non‑negotiable rules for every project.
Zero tracking by design
We never add analytics, ad SDKs or fingerprinting.
On‑device by default
All data stays on the phone.
Battery discipline
We treat background work as a cost and measure it.
Accessible interfaces
Screens work with TalkBack, large text and sensible contrast.
0trackers in our apps
0advertising IDs used
100%of app data kept on the device
1platform we build for
Plain terms
What we do
- Build native Android tools in Kotlin
- Keep user data on the device
- Explain every permission in plain language
- Support the app after release
What we never do
- Sell or share personal data
- Add advertising IDs or tracking SDKs
- Hide behavior behind vague policies
- Ship features nobody asked for
Questions, answered
Brief answers about how we work.
What does reteceli.com do?
We design, build and maintain native Android tools, focusing on offline use and privacy.
Which platforms do you support?
Android only. We go deep on one platform instead of spreading thin.
What do you do with user data?
Our tools keep data on the device. No analytics, no ad SDKs, no data sales.
How can I contact you?
Write to evelyn54thornton@gmail.com or use the contact form on this page.
Do you support apps after release?
Yes. We ship fixes, adapt to new Android versions and keep dependencies current.
Studio details
reteceli.com is an Android development studio. Here is who stands behind the tools.
- Companyreteceli.com
- DUNS733941012
- Address1st Floor 297 Euston Road LONDON, NW1 3AD
- Phone+48794578018
- Websitereteceli.com
Start a conversation
Tell us what you are building. Your email app opens with a prepared message.
Privacy, in short
Our tools 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 tool below.
- No personal data collected
- No advertising ID
- Delete the app, delete your data
Privacy policies