# Umeo - Number Place — Satisfying 3D sudoku

> Satisfying 3D sudoku (iPhone/iPad app by ATI株式会社.)

- Source: https://appshunter.io/ios/app/umeo-number-place/id6790279868 (this page in markdown: same URL + `.md`)
- Developer: [ATI株式会社](https://appshunter.io/developer/6788677262)
- Category: Games, Board, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 14.0 · 74 MB
- Languages: American English
- Released: 2026-07-15
- Data updated: 2026-07-24
- User reviews in markdown: https://appshunter.io/ios/app/umeo-number-place/id6790279868/reviews.md

## What is Umeo?

Umeo is a quiet sudoku.

No timers chasing you. No game over. No noisy effects breaking your
concentration. Just the gentle feel of placing a number, and the calm
satisfaction of a board filling up.

A simple sudoku, made for people who enjoy thinking.

FEATURES
• A calm 3D board that stays out of your way: numbers settle softly,
  a single ripple spreads. Each difficulty plays under its own sky —
  dawn, day, dusk and night
• Difficulty by technique, not by blank count: 400 puzzles
  (4 levels x 100), classified by the solving techniques they actually
  require. Every puzzle is verified to have exactly one solution
• Beautiful boards: given numbers are laid out in symmetric patterns
• Stuck? Flip the board and glimpse the answers showing through in
  mirror writing — a hint unlike any other
• A keepsake for every win: the finished board becomes an engraved plaque
• Notes on a fixed 3x3 grid, undo/redo, optional mistake hiding
• Auto-save; track your progress in the puzzle list
• Fully offline, no account. Your data stays on your device
• Japanese & English

One quiet puzzle at the end of the day.


## Version history (last 3 releases)

### 1.1.0 — 2026-07-21

- New: the Keepsakes room. Your progress quietly fills a shelf of 28 commemorative plaques
- Tap a plaque to flip it over and see the date it was earned
- Puzzles you have already solved count retroactively
- Other small improvements

### 1.0.1 — 2026-07-18

- Fixed an issue where undoing right after completing a puzzle could break the finished board
- Mistakes are now recorded even when mistake display is turned off
- Improved save data protection: your progress now recovers automatically if the app is interrupted while saving
- Other stability improvements

### 1.0 — 2026-07-15

No release notes.

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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 2026-07-24.*