mechelleell9841@gmail.com+48794781733
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Pure Android studio

We build native Android tools, but never send your data elsewhere

WALC SP Z O O creates offline‑first Android apps in Kotlin and Jetpack Compose. No trackers, no advertising ID, no hidden behavior after install.

Explore Stack SmashGet in touch
  • Built for Android
  • Offline by design
  • No ad IDs
Stack Smash
Offline readyZero trackersMaterial 3 UI
  • Android native
  • Kotlin
  • Jetpack Compose
  • Offline first
  • Accessibility
  • Privacy focused
12:30
Stack Smash
Streak7
This week

Our app

Stack Smash

Stack Smash follows our core recipe: native, fast to launch, and silent about your data.

  • Operates without network
  • Stores data locally on the device
  • Requests only needed permissions
  • No accounts, ads, or analytics SDKs
  • Android
  • Offline‑first
  • No ad ID
  • Kotlin
Read the privacy policy

Our expertise

From concept to release, we handle every Android detail with precision.

  1. Native Android solutions

    Kotlin from day one. Apps run smoothly on modest devices and feel at home on Android.

  2. Jetpack Compose UI

    Declarative screens, Material 3 styling, adaptive layouts and fluid motion.

  3. Offline data handling

    Room and DataStore keep everything locally, so the app works in tunnels and on flights.

  4. Battery & performance

    We profile startup, jank and background work, then monitor Android Vitals after each update.

  5. Accessibility built‑in

    TalkBack labels, high contrast and large‑text support are included from the start.

  6. Long‑term maintenance

    Signed builds, staged Play Store rollouts and continuous updates for new Android releases.

Our guarantees

Four non‑negotiable rules for every project.

Zero tracking by design

We never embed analytics, ad SDKs or fingerprinting.

On‑device processing

All data stays on the phone by default.

Battery discipline

Background work is measured and kept to a minimum.

Accessible interfaces

Screens support TalkBack, large text and proper contrast.

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

Our workflow

Four stages from first call to ongoing support. Each stage delivers a tangible checkpoint.

  1. Discovery

    We define the problem, target users, and absolute constraints.

  2. Architecture

    We draft screens, data flow and permissions before any production code.

  3. Build

    Kotlin, Compose and tests compiled into incremental builds you can try instantly.

  4. Release & care

    Staged Play Store rollout, continuous monitoring, fixes and updates for new Android versions.

UIComposeViewModelStateFlowRepositorysingle sourceStorageRoom · DataStore

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

Tools we trust

A minimal, purpose‑built toolbox that keeps code maintainable.

Kotlin

Concise, null‑safe Kotlin code that's easy to review.

Coroutines & Flow

Coroutines & Flow for clean async and state handling.

Jetpack Compose

Jetpack Compose for adaptive, declarative UI.

Room

Room provides a typed local database for offline storage.

WorkManager

WorkManager schedules reliable background jobs within battery limits.

Hilt

Hilt offers testable dependency injection.

Gradle CI/CD

Gradle CI/CD ensures repeatable builds and checks.

Play Console

Play Console manages staged rollouts and health metrics.

Questions, answered

Brief answers about our process.

What does WALC 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 specialize deeply in this platform.

What do you do with user data?

Data stays on the device. No analytics, no ads, no data selling.

How can I contact you?

Email mechelleell9841@gmail.com or use the contact form on this page.

Do you support apps after release?

Yes. We deliver fixes, adapt to new Android versions and keep dependencies up‑to‑date.

Studio details

WALC SP Z O O is an Android development studio. Meet the team behind the code.

Start a conversation

Tell us about your project. Your email client opens with a ready‑to‑send message.

mechelleell9841@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. See the full policy for each app below.

  • No personal data collected
  • No advertising ID
  • Delete the app, delete your data

Privacy policies