# Flat - Daily 3D Brain Puzzle — Cube Hole Filler: Logic Game

> Minimalist 3D puzzle game to flatten boards by moving cubes into holes. (iPhone/iPad app by masanao matsui.)

- Source: https://appshunter.io/ios/app/flat-daily-3d-brain-puzzle/id1609852968 (this page in markdown: same URL + `.md`)
- Developer: [masanao matsui](https://appshunter.io/developer/1232130754)
- Category: Games, Entertainment, Casual, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 18.0 · 103 MB
- Languages: American English
- Released: 2022-03-20
- Data updated: 2026-10-12
- Monetization: ad-supported
- User reviews in markdown: https://appshunter.io/ios/app/flat-daily-3d-brain-puzzle/id1609852968/reviews.md

## What is Flat?

Flat is a 3D puzzle game where you slide cubes to make the board flat.

■ How to Play
Swipe to slide the cubes into the holes on the board. Fill every hole to make the board flat and clear the stage.

■ 50 Stages
As you progress, new gimmicks appear: one-way tiles, switches, breakable cubes, splitting tiles and more.

■ Daily Stage
A new stage is added every day. You can also play past days from the calendar.

■ Show Answer
If you get stuck, the solution plays automatically so you can see how to solve it.

■ Share
When you clear a daily stage, you can share an image of the board and your move count.

## Key features

- 3D puzzle gameplay
- Minimalist design
- 50 challenging stages
- Intuitive swipe controls
- Progressive mechanics

## Is Flat safe?

Not enough ratings yet to assess Flat.

## Is Flat legit?

Flat - Daily 3D Brain Puzzle appears to be a legitimate app. The AppsHunter Legitimacy Score for Flat is 90 out of 100 points across 7 verification signals from App Store and developer data.

## Recent user reviews (5 of 5)

All indexed reviews: https://appshunter.io/ios/app/flat-daily-3d-brain-puzzle/id1609852968/reviews.md

### 5/5 — リラックスMAX

*2026-05-16*

次やったらこんなにスムーズにできないかも？？なぜかスルスルっと出来たりすると、なんだか頭もココロもすっきりします。見た目もスタイリッシュで気に入りました。

**Developer response:** プレイいただきありがとうございます！
レビューと高評価も嬉しい限りです☺️

「頭もココロもすっきりします」とのお言葉、開発者としてこれ以上ない喜びです。直感的な操作感や、スタイリッシュな見た目にこだわって制作したため、そこを気に入っていただけて非常に励みになります。

これからも心地よく楽しんでいただけるようアップデートを続けてまいりますので、ぜひ今後ともよろしくお願いいたします！！！！

### 5/5 — やあ

*2026-05-11*

デザインとBGMが良い。

**Developer response:** プレイいただきありがとうございます😊
可愛く落ち着く雰囲気を目指しました！

### 5/5 — 優しい解き心地

*2026-05-08*

ルールだけ見た時はどんどん難しくなっていきそうと思いましたが、幸い難易度は抑えめで、心穏やかに解けました。
後半になるといろいろな仕掛けが登場し、コースの最後や途中から考えるような場面もあって面白かったです。今後ステージが追加されるならぜひまたプレイします。

**Developer response:** プレイいただきありがとうございます😊
レビューありがとうございます！
ルールを見た時の印象よりも、リラックスしてプレイしていただけたようで良かったです。
いろいろな仕掛けが登場する後半戦も「面白かった」と言っていただけて嬉しい限りです！！
また新しいステージでお会いできるよう、コツコツとアップデートの準備を進めてまいります。
これからもよろしくお願いいたします！

### 5/5 — 音も動きもぷにぷに気持ちいいパズル🧩

*2026-05-08*

見た目が好きで遊んでみたら、難易度も操作感もとても良くて、無限に遊んでいたい…の気持ちになりました🫶
ステージが進むとギミックも増えて楽しいです！

**Developer response:** 遊んでいただきありがとうございます😭
また、レビューを書いていただきありがとうございます！
見た目だけでなく、操作感や難易度まで気に入っていただけて、感無量です。
「無限に遊んでいたい」というお言葉、開発の大きな励みになります。
これからも楽しんでいただけるよう、ステージの追加や改善を続けていきますので、ぜひ長く可愛がってあげてください！！

### 5/5 — 満足です

*2022-07-27*

ストレスなく楽しめました。
画面を切り替えると表示が反映されないときがありますが、操作に困ることはなかったです。

**Developer response:** 遊んでいただきありがとうございます😊

## Frequently asked questions about Flat

### What is the gameplay like in Flat?

In Flat, the goal is to move all the cubes on the board into the black holes to make the board completely flat. The game features 50 stages with progressively introduced mechanics like arrow panels and switches.

### Does Flat have ads?

Yes, Flat contains advertisements. As a free game, it is supported by ads to provide the content to players.

### What devices is Flat available on?

Flat is currently supported on iPhone devices.

### How many levels are there in Flat?

Flat offers 50 stages of intellectual challenges for players to complete.

### Is Flat suitable for all ages?

Flat has an age rating of 4+, making it suitable for younger players and families. The puzzles are designed to be engaging without being overly complex.

### How often is Flat updated?

The latest version of Flat is 2.1.1, and it was last updated on June 24, 2026. Updates typically introduce new content or improvements.

### Can I play Flat offline?

The provided data does not specify if Flat supports offline play. However, many puzzle games of this nature can be enjoyed without an internet connection.

### What is the price of Flat?

Flat is available for free. The game is monetized through advertisements.

## Version history (last 5 releases)

### 2.2 — 2026-10-04

[New Features & Improvements]
- Daily Mode:
A new stage is added every day.
You can also play stages from past days on the calendar.

If you get stuck on a daily stage, give up to watch the solution play automatically.
You can also share an image of the board and your move count after clearing a daily stage.

Thank you for using Flat!
If you have any feedback or bug reports, please contact us via [Information > Inquiry] on the title screen.

### 2.1.1 — 2026-06-24

【Update】
・Adjusted the design of some buttons.

### 2.1 — 2026-06-14

The number of stages has increased to 50!

【New Gimmicks】
・Cracked Cube
  A cube that breaks after being hit once.
  You must break these cubes in addition to filling the holes.

・Split Cube
  A cube that can be split into two.
  Splitting occurs horizontally relative to the direction of travel.

### 2.0 — 2026-05-06

・デザインとギミック、ステージを一新しました

### 1.9.1 — 2022-12-13

fix admob.

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## More apps by masanao matsui

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- [CoffeeJourney – Coffee Tracker](https://appshunter.io/ios/app/coffeejourney-coffee-tracker/id6758566084)

All apps by masanao matsui: https://appshunter.io/developer/1232130754

## Related topics

[flat](https://appshunter.io/ios/topics/flat)

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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 2026-10-12.*