# Missing Digits: Math Puzzle — Crack the hidden numbers

> Crack the hidden numbers (iPhone/iPad app by torankirite.)

- Source: https://appshunter.io/ios/app/missing-digits-math-puzzle/id6799607537 (this page in markdown: same URL + `.md`)
- Developer: [torankirite](https://appshunter.io/developer/1883564850)
- Category: Games, Education, Board, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English, Japanese
- Released: 2026-08-20
- Data updated: 2026-10-02
- User reviews in markdown: https://appshunter.io/ios/app/missing-digits-math-puzzle/id6799607537/reviews.md

## What is Missing Digits?

Uncover the hidden digits by reasoning, not guessing.

4■2 + ■8■ = 12■5.
Guessing gets you nowhere. But follow the carry from the ones column,
and the answer narrows to exactly one possibility.

FUKUMEN does one thing: missing-digit arithmetic, done beautifully, forever.


■ Features

- Endless puzzles, generated on your device
  From simple addition to full long multiplication with three partial-product rows.
  You will not see the same puzzle twice.

- Exactly one answer, always
  Each puzzle starts as a completed sum, then digits are hidden — but only up to
  the point where a second answer would become possible. Every puzzle is verified
  before it reaches you. No unsolvable boards. No ambiguous boards.

- Four difficulties
  Easy and Normal are addition. Hard and Oni are long multiplication.
  At Oni, 19 of the 26 cells are blank.

- Today's puzzle
  One puzzle a day, the same one for everyone. Streaks and a calendar
  keep your history visible.

- A real long-form layout
  Chalk on a blackboard, set vertically the way you'd write it by hand.
  Tap a blank, type a digit. The board scales up when the numbers are short.

- Quiet help
  Columns that can't work out are tinted, gently — you can turn this off.
  And if you're truly stuck, a hint opens a single cell.

- Records
  Puzzles solved, streak, average time, best time per difficulty.


■ Who it's for

- Sudoku and crossword solvers looking for something that actually uses arithmetic
- Anyone who wants to deduce rather than drill
- Parents and kids working through missing-digit problems for entrance exams
- People building a small daily thinking habit
- Anyone who needs a puzzle that works with no signal — trains, planes, anywhere


## Version history (last 1 release)

### 1.0 — 2026-08-21

No release notes.

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All apps by torankirite: https://appshunter.io/developer/1883564850

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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 2026-10-02.*