Serious skills. Seriously fun.
Diffy makes joyful Mac apps that teach kids ages 6–12 real skills — starting with touch typing, with brain-training and skill-building games on the way. Kid-safe, offline, and free of ads. Always.
Our first app · out now for Mac
TypeQuest
A touch-typing adventure for kids ages 6–12.
6 worlds, 26 lessons
A bite-size quest from the home row all the way to full stories.
5 arcade games
Letter Drop, Word Meteors, Rocket Race, Key Moles & Copy Cat — play is practice.
Voice-guided tutorials
A friendly narrator and cartoon hands show exactly which finger to use.
Family leaderboards
Every kid gets a profile — siblings race on stars, speed and high scores.
Stars, badges & streaks
16 badges from First Steps 🐣 to Lightning Hands ⚡️ reward effort, not just talent.
100% offline & kid-safe
No ads, no accounts, no chat, no tracking. Everything stays on your Mac.
Free download
macOS 14 (Sonoma) or newer · Apple Silicon Macs
First launch: TypeQuest is fresh out of the oven and not yet notarized by Apple, so macOS will double-check with you. Unzip, drag TypeQuest to Applications, then right-click it and choose Open → Open. You only have to do this once.
More quests brewing 🧪
TypeQuest is just the first key. Here's what the Diffy lab is cooking next.
Brain Boosters
coming soonMemory, logic and focus games that grow trickier as kids grow sharper.
Skill Studio
coming soonPlayful challenges that build real-world skills — one badge at a time.
The Diffy promise 🤙
Diffy apps are made by a parent, for families. Kids get delight; parents get peace of mind. Every app keeps its data on your Mac and asks nothing of you — no sign-ups, no subscriptions to babysit, no fine print.
No ads, ever
No tracking
Works offline
Built for families