Daily micro-learning
that actually sticks.
We build micro-apps that turn rich subjects into daily rituals that take less than 60 seconds. You learn, discover, or improve a little every day, without overload.
Our philosophy
Micro-learning, not noise
Every app is designed to turn one distracted minute into real progress.
Zero overload
One useful idea at a time. No endless scrolling, no decision fatigue, just the essential.
Useful micro-learning
Each session takes under a minute, but the compounding effect over time meaningfully changes what you retain.
A ritual that lasts
Apps designed to become a simple, satisfying, lasting daily habit, far from doomscrolling.
About
Karei Studio
Karei Studio is an independent mobile studio that builds micro-learning apps. Our goal is simple: build micro-apps regularly and share them with the world. No complexity. Just simple tools that help you learn a little every day.
Our apps
A micro-app for every curiosity
Each app takes a dense subject and turns it into a daily dose that is clear, memorable, and actionable.
On This Day is live on Google Play. Traces is currently in development.
On This Day: History Daily
History
A trip through time. The major or surprising historical event tied to today’s date.
Traces
Productivity
Your habits, routines, and streaks app. Build consistent rituals, one day at a time.
Under the hood
Powered by the Karei Engine
An architecture built to deliver fresh, reliable, and consistent micro-learning every day across all our platforms.
Universal architecture
One engine for iOS, Android, and Web.
Cross-platform
Deployed simultaneously across every store.
Real-time content
Fresh content every day, no app update required.
End-to-end security
Your data stays protected from end to end.
Micro-services
Each app runs as an independent, scalable service.
Automated CI/CD
Continuous delivery keeps content reliably up to date.
Testimonials
What our users say
“My morning ritual for the last 3 months. Sherlock wakes me up better than coffee.”
Marie L.
UX Designer
“I learn one kanji a day without even noticing it. Karei really gets micro-learning.”
Thomas R.
Developer
“Finally, an app that respects my time. 60 seconds, not a second more.”
Sophie B.
Founder