# KiraKotsu: Focus Study Timer — Grow crystals as you focus

> Grow crystals as you focus (iPhone/iPad app by ERI MUNAKATA.)

- Source: https://appshunter.io/ios/app/kirakotsu-focus-study-timer/id6792177696 (this page in markdown: same URL + `.md`)
- Developer: [ERI MUNAKATA](https://appshunter.io/developer/6788573608)
- Category: Education, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 4 MB
- Languages: American English, Japanese
- Released: 2026-07-31
- Data updated: 2026-08-08
- User reviews in markdown: https://appshunter.io/ios/app/kirakotsu-focus-study-timer/id6792177696/reviews.md

## What is KiraKotsu?

Put your phone down and focus — a sparkling crystal grows while you work.
Even if you stop partway, your effort is never lost: your time is saved and you keep a crystal shard.
KiraKotsu is a completely free focus timer for studying, working, and reading.

WHY KIRAKOTSU IS DIFFERENT
Most focus timers punish you when you give up. KiraKotsu never does. Interrupted sessions still count: every minute you focused is recorded, and you always take home a shard. Building a study habit should feel encouraging, not stressful.

FEATURES
- Simple by design: choose a duration, set your phone down, and focus. The longer you concentrate, the bigger your crystal grows
- No punishment, ever: stop anytime and your time is still recorded — you receive crystal shards for the effort you put in
- Pomodoro support: the classic 25 minutes x 4 rounds, with short breaks built in
- Collect 24 minerals: every crystal you grow joins your collection, complete with real mineral trivia (quartz, amethyst, obsidian, and more)
- Track your progress: daily focus time, streaks, and a per-tag breakdown (study / work / reading / creating) shown in clear charts
- Build a habit: set a daily goal and keep your streak alive
- Private by default: no account needed — all your data stays on your device
- Works fully offline

ABOUT ADS
KiraKotsu shows ads so it can remain completely free.
Ads never appear while you are focusing.
Watching ads is always optional (the "Sparkle Charge" that doubles your coins is entirely up to you).

PERFECT FOR YOU IF...
- You keep reaching for your phone while studying
- You want your hard work to take a visible, permanent form
- You have tried grow-a-plant timers and felt awful when things withered

Set your phone down. Watch your effort crystallize.


## Version history (last 2 releases)

### 1.0.1 — 2026-08-06

Now available in English! The app interface and App Store listing have been localized.

### 1.0 — 2026-07-21

No release notes.

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All apps by ERI MUNAKATA: https://appshunter.io/developer/6788573608

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-08.*