Independent software studio

We build apps.
You use them.

Overkaiser is an independent studio creating useful Android products for millions of everyday moments — from accessibility to gaming to exam prep.

Explore our apps → What we build ↓

31 apps published on Google Play

Different ideas. Different people. Different problems.

From accessibility and gaming to education, productivity and specialized tools, we build focused apps designed to solve real problems. We don't build the same app fifty times — we explore different ones.

AccessibilityGaming & CreatorsEducationUtilitiesKnowledgeDeveloper ToolsVideoFinance
What we build

Real categories, straight from the catalog.

No service list. These are the kinds of products we actually ship.

3 apps
♿

Accessibility

Tools that make devices easier to use for more people.

 2 apps
🎮

Gaming & Creators

Tools for players and the content they make.

 14 apps
🎓

Education

Apps designed to practice, prepare and learn.

 5 apps
🧰

Utilities

Focused tools for everyday, specific problems.

 1 app
🧠

Knowledge

Apps built around curiosity and learning.

 3 apps
⚙️

Developer Tools

Specialized utilities for testing and development.

We like solving different problems.

Sometimes that means an accessibility tool. Sometimes a gaming recorder. Sometimes an exam-prep app. Sometimes something nobody asked for — until they needed it.

Accessibility magnifier Gaming recorder Exam prep Daily quiz RAM stress test Dividend charts
From idea to product

How an app gets made here.

Not a slide deck. A loop we run on every product.

01
💡

Think

An idea starts with a problem worth solving.

02
🛠️

Build

We design, engineer and iterate.

03
🚀

Ship

We publish it and put it in people's hands.

04
👀

Learn

Users tell us what should come next.

05
📈

Improve

The product keeps evolving after launch.

By the numbers

A few numbers we're proud of.

0
Apps published on Google Play
0
Categories covered
0
Flagship products with dedicated experiences
The catalog

There's probably an app for that.

See all 31 apps →
ScreenZoom Pro

Screen magnifier with zoom, OCR, and text-to-speech for Android.

Accessibility
GameCam

Gameplay recorder with FaceCam overlay for creators.

Gaming & Creators
TCAE Tests

Tests to prepare for Nursing Assistant exams.

Education
Culture Geniuses

Daily quiz to discover more and become a culture genius.

Knowledge
Display Magnifier

A powerful accessibility tool to zoom in on any part of the screen instantly.

Accessibility
Geraldine: Dividend Analysis Charts

Analyze stocks using Geraldine Weiss's dividend yield investment method.

Finance
Fill Memory

A developer tool to fill RAM memory and stress test.

Developer Tools
ApkSi: APKs & XAPK Installer

Easy installer for APK, XAPK, and APKM packages with split support.

Utilities
Speaker Cleaner: Eject Water

Restore audio quality by removing water and dust from your speakers.

Utilities
Black screen camera record

Records video discreetly with the screen off.

Video & Recording
Guardia Civil Tests

Tests to prepare for Guardia Civil exams in Spain.

Education
Web Shortcut: Instant Access

Create quick shortcuts on your home screen for your favorite websites.

Utilities
Device Stress Test: System Pro

Stress test your CPU, RAM, and Disk to evaluate system stability.

Developer Tools
ScreenZoom Pro

Screen magnifier with zoom, OCR, and text-to-speech for Android.

Accessibility
GameCam

Gameplay recorder with FaceCam overlay for creators.

Gaming & Creators
TCAE Tests

Tests to prepare for Nursing Assistant exams.

Education
Culture Geniuses

Daily quiz to discover more and become a culture genius.

Knowledge
Display Magnifier

A powerful accessibility tool to zoom in on any part of the screen instantly.

Accessibility
Geraldine: Dividend Analysis Charts

Analyze stocks using Geraldine Weiss's dividend yield investment method.

Finance
Fill Memory

A developer tool to fill RAM memory and stress test.

Developer Tools
ApkSi: APKs & XAPK Installer

Easy installer for APK, XAPK, and APKM packages with split support.

Utilities
Speaker Cleaner: Eject Water

Restore audio quality by removing water and dust from your speakers.

Utilities
Black screen camera record

Records video discreetly with the screen off.

Video & Recording
Guardia Civil Tests

Tests to prepare for Guardia Civil exams in Spain.

Education
Web Shortcut: Instant Access

Create quick shortcuts on your home screen for your favorite websites.

Utilities
Device Stress Test: System Pro

Stress test your CPU, RAM, and Disk to evaluate system stability.

Developer Tools

Some problems are big. Others are wonderfully specific. We build for both.

Built for Android

Built for Android. Built to last.

Good software should feel good to use. We care about the details users notice — and the ones they don't.

AndroidKotlinModern UIPerformanceAccessibilityPrivacyContinuous improvement
⚡

Performance

Fast and responsive on real devices.

♿

Accessibility

Designed for more people, not fewer.

🔒

Privacy

Clear, responsible data practices.

🔄

Updates

Products improve after launch.

Something here might be exactly what you need.

Explore what we've built — and find the app for your problem.

Explore our apps → Google Play
Built by Overkaiser