puhigekuzi440@gmail.com+48794769928
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Native Android studio

Android apps that stay on the phone, not in the cloud

We design offline-first Android apps in Kotlin and Jetpack Compose. No trackers, no advertising ID, no hidden code after install.

Explore Chroma HopGet in touch
  • Android‑native
  • Offline‑first
  • No ad ID
Works offlineZero trackersMaterial 3 UI
12:30
Chroma Hop
Streak7
Week
  • Android‑native
  • Kotlin
  • Jetpack Compose
  • Offline‑first
  • Accessibility
  • Privacy by design

What we build

Full‑cycle Android development, from sketch to release, with the details handled right.

  1. Native Android apps

    Kotlin from day one. Apps run smoothly on modest devices.

  2. Compose interfaces

    Declarative UI with Material 3, responsive layouts and motion.

  3. Offline data handling

    Room and DataStore keep everything on‑device, even in tunnels.

  4. Battery and performance

    We profile start‑up, jank and background work, then monitor Android Vitals.

  5. Accessibility built‑in

    TalkBack labels, high contrast and large‑text support are default.

  6. Release & long‑term care

    Signed builds, staged rollouts on Google Play and continuous updates.

Our app

Chroma Hop

Chroma Hop follows our blueprint: native, quick to launch and silent about your data.

  • Operates without a network
  • Stores data locally on the device
  • Requests only required permissions
  • No accounts, ads, or analytics SDKs
  • Android
  • Offline‑first
  • No ad ID
  • Kotlin
Read the privacy policy
12:30
Chroma Hop
12:30
Chroma Hop
Streak7
Week
12:30
Chroma Hop

How we build

Four steps from first call to ongoing support. Each step leaves a tangible output.

  1. Discovery

    Define the problem, users and what the app must avoid.

  2. Architecture

    Sketch screens, data flow and permissions before any production code.

  3. Build

    Kotlin, Compose and tests delivered in incremental builds you can try.

  4. Release & care

    Staged rollout on Google Play, then monitoring, fixes and version updates.

UIComposeViewModelUI stateRepositorycache firstWorkerWorkManager

One-way data flow: the interface observes state, and the repository owns the data.

Tools we trust

A concise toolbox that keeps apps maintainable.

Kotlin

Clear, null‑safe Kotlin code.

Coroutines & Flow

Coroutines for smooth background work.

Jetpack Compose

Compose screens that adapt to any device.

Room

Room provides a typed local database.

WorkManager

WorkManager handles reliable background jobs.

Hilt

Hilt enables testable dependency injection.

Gradle CI/CD

Gradle CI/CD runs checks on every change.

Play Console

Play Console manages staged rollouts and vitals.

What we promise

Four non‑negotiable rules for every project.

0trackers in our apps
0advertising IDs used
100%of app data kept on the device
1platform we build for

Zero tracking by design

We never add analytics, ad SDKs or fingerprinting.

On‑device by default

All data stays on the phone.

Battery discipline

Background work is measured and kept minimal.

Accessible interfaces

Screens work with TalkBack, large text and proper contrast.

Plain terms

What we do

  • Build native Android apps in Kotlin
  • Keep user data on the device
  • Explain each permission clearly
  • Support releases with updates

What we never do

  • Sell or share personal data
  • Add advertising IDs or tracking SDKs
  • Hide behavior behind vague policies
  • Ship unrequested features

Questions, answered

Brief answers about our process.

What does BAK SP Z O O 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?

Data stays on the device. No analytics, no ad SDKs, no selling.

How can I contact you?

Email puhigekuzi440@gmail.com or use the contact form.

Do you support apps after release?

Yes. We provide fixes, adapt to new Android versions and keep dependencies current.

Studio details

BAK SP Z O O is an Android development studio. Meet the team behind the apps.

Start a conversation

Tell us about your project. Your email app will open with a prepared message.

puhigekuzi440@gmail.com

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