On‑device by default
Your data is processed and stored on your phone.
Android development, done properly
Pure Android, no ports
SYWELL SAFETY GROUP LTD delivers native Android apps built with Kotlin and Compose that run without a network connection.
- Native Android
- Offline first
- No ad ID
Native Android
Offline first
No ad ID
- Native 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
A closer look
Deep Line
Deep Line follows the same rules as every app we ship: native Android, fast launch, no data leaves the device.
- Requests only necessary permissions
- No accounts, no ads, no analytics SDKs
- Stores data locally on the device
- Works without a connection
What we build
Full‑stack Android solutions, from concept to release.
Long‑term care
Signed builds, staged rollouts on Google Play and ongoing updates as Android evolves.
Battery & performance
We profile start‑up, jank and background work, then monitor Android Vitals after each release.
Native Android apps
Kotlin from day one. Apps feel at home on Android and run on modest hardware.
Compose interfaces
Declarative UI with Material 3, adaptive layouts and smooth motion.
Accessibility
TalkBack labels, readable contrast and large‑text support are built in.
Offline‑first data
Room and DataStore keep everything on‑device, so the app works in a tunnel or on a plane.
Where we don't compromise
The parts of the job we never shortcut.
Battery discipline
We treat background work and wake‑ups as a cost, and we measure them.
Zero tracking by design
We do not add analytics, ad SDKs or fingerprinting.
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
Our process
A short, predictable path from idea to a released app.
Discovery
We define the problem, target users and strict privacy rules.
Architecture
We map 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.
One-way data flow: the interface observes state, and the repository owns the data.
What we build with
Standard, well‑supported tools — nothing exotic, nothing hard to hand over.
Kotlin
Concise, null‑safe code that is easy to review.
Coroutines & Flow
Background work and state without callback tangles.
WorkManager
Reliable background jobs that respect battery limits.
Hilt
Dependency injection that keeps modules testable.
Play Console
Staged rollouts, vitals and release tracking.
Gradle CI/CD
Repeatable builds and checks on every change.
Room
A typed local database for offline data.
Jetpack Compose
Declarative screens that adapt to phones and tablets.
Questions, answered
Straight answers, no fine print.
Which platforms do you support?
Android only. We go deep on one platform instead of spreading thin.
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 tamsin8rowe@gmail.com or use the contact form on this page.
What does SYWELL SAFETY GROUP LTD do?
We design, build and maintain native Android apps focused on offline use and privacy.
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.
Who we are
Here is who stands behind SYWELL SAFETY GROUP LTD and the apps it builds.
- CompanySYWELL SAFETY GROUP LTD
- Address16 Blandford Avenue KETTERING, NN16 9AR
- Phone+48794431845
- Websitesywsafro.com
Talk to us
A quick message is enough to start; your email app opens pre‑filled.
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