Philipp Jahoda
A chart library trusted by thousands of Android apps, a screenshot tool for macOS built for AI agents, an interval timer and an expense tracker for iPhone, and a trick shot game for iPhone and iPad.
Open source · Android
The chart library for Android. Line, bar, pie, scatter, candlestick, bubble, radar and combined charts with zooming, dragging, highlighting, markers and animations. Written in Kotlin, with a Jetpack Compose module, and used in tens of thousands of apps.
App · macOS
Capture, record, annotate, done. A menu bar tool for screenshots and screen recordings with one slim editor for both, scrolling capture, background removal, pins that float on screen and a history that never loses a capture. Its built in MCP server lets Claude Code, Claude Desktop, Codex and any MCP client see what they built: capture a window, read its text and mark it up. You approve each agent once, and every mark it draws stays editable.
App · iPhone
Interval training without the fiddling. Set work, rest, sets and rounds, then hit start. Numerals you can read across the room, a haptic tap on every change, templates for the workouts you repeat, and a weekly streak that keeps you honest.
Game · iPhone and iPad
Pop every bird in fewer shots. An elephant fires bowling balls into the sky: aim, set the power, fire. 80 hand-made levels with bouncers, portals and wind zones, three stars and gold for your best runs, a level editor for your own, and progress that syncs over iCloud. Free, no ads, no account needed.
App · iPhone
Know your budget. Tap plus and type the amount, tell Siri, or point the camera at a receipt. Monthly overviews, budgets that warn early, statistics per category and iCloud sync, with your data staying on your device.
Smaller libraries and experiments live on github.com/PhilJay, including JWT, a Kotlin JSON Web Token implementation for Apple push notifications and Sign in with Apple.
