Karei Studio
We build mobile apps designed fordaily use.
Simple, useful apps for everyday life — shipped fast, with care, in public.
華麗かれい · karei — splendid, brilliant
The apps
The work, in apps
Each project is tangible proof: design, engineering, and shipping. Android first, iOS when the app is ready — On This Day is already on the App Store.
On This Day, Moments Daily, Art Daily, and Shiori are live on Google Play. On This Day is also on the App Store (iOS). Citation is in development. Step-by-step timeline: “Build in public.”
On This Day: History Daily
HistoryLive since Mar 16, 2026
A daily history micro-dose: a notable event or story tied to today’s date — now with a Daily Challenge to test your knowledge.
Moments Daily
Routines & habitsLive since Apr 7, 2026
Habits, routines, and streaks — build rituals that last, one day at a time.
Art Daily
Culture & artLive since Apr 2, 2026
Art for every day: discover an artwork, movement, or detail to explore calmly, daily.
Shiori: Reading tracker
Books & readingLive since Apr 15, 2026
Track your reading without pressure: add your books, mark your pages, keep the thread day after day.
The concept
A suite of simple apps around everyday life
We are assembling complementary mobile apps around productivity, light learning, and habits — each with a clear promise, without bloat.
One idea per app
No “do-everything” super-app: each title solves a specific need so you always know why to open it.
Useful before flashy
Short, honest rituals: real progress over time, not hollow gamification.
Same DNA, different jobs
History, routines, art — the topics change; the philosophy stays: clear, polished, quick to understand.
The studio
Minimal, useful, fast
Karei is not a single product SaaS: it is a studio, a creative medium, and a lab to ship multiple quality mobile apps in parallel — with a few R&D explorations running on the side (vision, on-device AI).
Vision
Show that several polished apps can come from a small team with a consistent product and visual line.
Design
Calm interfaces, careful typography, restrained motion — design serves clarity and trust, not empty wow.
Product philosophy
Prefer honest simplicity over feature lists; iterate in public and adjust with real feedback.
Build in public
Where things stand
A few time markers — shipped work and what is in motion.
March 2026
Project kickoff — On This Day
On This Day: History Daily — product scope and first development work.
March 2026
Play Store submission — On This Day
Android build sent for Google Play review.
March 16, 2026
Play Store approval — On This Day
Listing approved: the app is live on Google Play.
March 2026
Work starts — Art Daily
Development begins on Art Daily (daily art).
April 2026
Work starts — Moments Daily
Development begins on Moments Daily (routines & habits).
April 2, 2026
Play Store approval — Art Daily
Listing approved: Art Daily is live on Google Play.
April 7, 2026
Play Store approval — Moments Daily
Listing approved: Moments Daily is live on Google Play.
April 15, 2026
Play Store approval — Shiori
Listing approved: Shiori (reading tracker) is live on Google Play.
April 19, 2026
App Store approval — On This Day (iOS)
First iOS release: On This Day is live on the App Store.
April 2026
Work starts — Citation
Citation kicks off: daily quotes and day-themed hooks — current focus.
May 2026
Daily Challenge — On This Day v1.4.0
Daily Challenge ships in On This Day: a daily quiz to test your history knowledge.