# Fill-in-the-blank calculation — Casual game for killing time

> Casual game for killing time (iPhone/iPad app by Takayuki Fujiwara.)

- Source: https://appshunter.io/ios/app/fill-in-the-blank-calculation/id1592045742 (this page in markdown: same URL + `.md`)
- Developer: [Takayuki Fujiwara](https://appshunter.io/developer/517669329)
- Category: Games, Education, Casual, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 14.1 · 13 MB
- Languages: English, Japanese
- Released: 2021-12-09
- Data updated: 2026-05-19
- User reviews in markdown: https://appshunter.io/ios/app/fill-in-the-blank-calculation/id1592045742/reviews.md

## What is Fill?

This app is a game that answers the fill-in-the-blank calculation question one after another.
Let's answer the falling question by the time it falls down.
Questions that could not be answered correctly are piled up, and the time to answer the question will be shortened.

Not only the ability to calculate, but also the ability to judge how to derive an answer is required.


[Features]

- Simple operation by pressing the number or symbol button and then the decision button

- 2 modes, "Normal" to challenge up to 100 questions and "Speedrun" to challenge the speed of answering 30 questions

- 3 levels of difficulty (Easy / Medium / Hard)

- Supports dark mode


Let's do a quick brain training in your free time.

The difficulty level "Hard" may be very difficult, but please try it.


## Version history (last 3 releases)

### 1.2 — 2022-12-14

- Added new questions to all difficulty levels.
- Implemented BGM.
- Improved performance.
- Fixed bugs.

### 1.1 — 2021-12-16

- Made performance improvements
- Adjusted the result screen

### 1.0 — 2021-12-09

No release notes.

## Apps similar to Fill

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Absolute Brain Puzzle](https://appshunter.io/ios/app/absolute-brain-puzzle/id1570103884) | — | Free | Games |
| [NUMBERS \| Brain training](https://appshunter.io/ios/app/numbers-brain-training/id6504842241) | — | Free | Games |
| [Sudoku Kaidoku](https://appshunter.io/ios/app/sudoku-kaidoku/id6450177207) | — | Free | Games |
| [Japanese Family Crest Nonogram](https://appshunter.io/ios/app/japanese-family-crest-nonogram/id1532358622) | 4.7 (3) | Free | Games |
| [ひよこ暗算: 頭を使うゲーム 脳トレ 計算 算数 数学 勉強](https://appshunter.io/ios/app/id1177073966) | 4.7 (34) | Free | Games |
| [TORECTA](https://appshunter.io/ios/app/torecta/id905916962) | 5.0 (1) | Free | Games |

## Related topics

[poyl creations](https://appshunter.io/ios/topics/poyl-creations)

---

*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 2026-05-19.*