Crafting thoughtful tools for daily life

Software built to resolve everyday problems
with speed and simplicity.

Kartoffelsoft is an independent software collective creating fast, offline-first, and privacy-respecting apps for iOS, Android, and macOS.

Explore Apps Get in Touch
Portfolio

Our Applications

Focused tools engineered to deliver high utility without distractions, data harvesting, or bloat.

Kartoffel Music Icon

Kartoffel Music

Offline Cloud MP3 Player
iOS & Android Offline First Google Drive Sync

Keep your MP3 music collection forever. Connect your Google Drive, download tracks straight to your device, and enjoy seamless offline playback anywhere without needing continuous internet connectivity.

Continue reading guide
App Store badge Google Play badge
Garden100 Icon

Garden100

US Stock Portfolio Tracker
US Stocks Google Sheets Sync Zero Server Data

Investing in stocks is like growing a garden. Garden100 is a clean portfolio monitor for US stocks where your data stays strictly in your own Google Sheet. We don't store or collect your portfolio records.

Explore Garden100
Web & Mobile
Kartoffel Flashcards Icon

Kartoffel Flashcards

Accelerated Learning
iOS & Android Productivity Active Recall

A simple, distraction-free flashcards companion engineered to boost your learning, reinforce retention, and help you master new subjects without ad noise.

Privacy Policy
App Store badge Google Play badge

Screen Pen

macOS Screen Annotation
macOS Utility Annotation 100% Offline

A lightweight screen annotation tool for macOS. Draw, highlight, and illustrate live over any desktop application during presentations, meetings, or coding walkthroughs.

Privacy Policy macOS

Voice Echo

Audio Revision & Recall
Audio Learning Revision

Reinforce knowledge, memorize concepts, and practice speech recall through focused audio prompts. Simple, intuitive, and designed to help you retain information effortlessly.

Privacy Policy Productivity
Principles

Built with Integrity

We follow three foundational tenets in everything we design and code.

Privacy by Default

Your files and financial data belong to you. We store data directly on your device or in your personal Google Drive / Sheets. No surveillance, tracking pixels, or data brokering.

Offline-First Design

Software should work even when the connection fails. Our apps ensure core playback, tracking, and editing experiences remain fully functional without internet access.

Focused & Uncluttered

No subscription walls for basic features, no spam push notifications, and no confusing UI. We construct clean, intentional tools that do one job exceptionally well.

Team

Developer

The engineer behind Kartoffelsoft projects.

Reach Out

Let's talk.

Interested in learning more about Kartoffelsoft, reporting an issue, or sharing suggestions? We'd love to hear from you.

Send an Email