# Paper Corners: Logic Puzzles — Shakashaka triangle brain game

> Shakashaka triangle brain game (iPhone/iPad app by Neeraj Aggarwal.)

- Source: https://appshunter.io/ios/app/paper-corners-logic-puzzles/id6815373665 (this page in markdown: same URL + `.md`)
- Developer: [Neeraj Aggarwal](https://appshunter.io/developer/1877631231)
- Category: Games, Casual, Puzzle
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English, Arabic, Bangla, Catalan, Croatian, Czech, Danish, Dutch, Finnish, Canadian French and 34 more
- Released: 2026-09-28
- Data updated: 2026-10-21

## What is Paper Corners?

Paper Corners is a Shakashaka logic puzzle: place black triangles in a grid until every white region forms a rectangle. Some rectangles sit straight; others tilt at 45 degrees. The numbered squares tell you how many neighboring squares need triangles.

Solve 222 pages in twenty-two chapters. Start with small boards, then work through larger pages up to 10 × 10. Choose a page by difficulty or follow the chapters in order.

A short introduction teaches the rules. Four optional technique lessons let you practice triangle clues, white squares, and rectangle edges. If you get stuck, a hint marks a cell and explains the deduction. Undo and redo let you revisit any move.

Play a daily page or choose an earlier date from the daily archive. An unfinished daily page stays available after midnight.

Keep your finished pages in a composition library, with the white rectangles traced in indigo. Mark favorites, share an image, export printable sheets, or send a playable page link to a friend.

Play offline on iPhone and iPad, without timers, lives, scores, or ads. The paper-and-ink design supports light and dark appearance, larger text, VoiceOver, Reduce Motion, and Increase Contrast.

The original 102 pages and your personal notebook stay free. Paper Corners Pro is a one-time purchase that unlocks daily pages, chapters 11 to 22, and future additions. Purchases can be restored.

## Is Paper Corners safe?

Not enough ratings yet to assess Paper Corners.

## Is Paper Corners legit?

Paper Corners: Logic Puzzles appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Paper Corners is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 4 releases)

### 1.4 — 2026-10-13

- Grows the collection to 222 pages in 22 chapters, with larger 10 × 10 pages, zoom, and an Expert level.
- Adds Paper Corners Pro, a one-time purchase for daily pages, chapters 11 to 22, and future pages.
- Adds Challenge a friend to notebook pages and the App Clip.
- Improve performance & reliability

### 1.2 — 2026-10-02

- Adds 40 pages across four new chapters, bringing the collection to 90 pages.
- Adds four short technique lessons for triangle clues, white squares, and straight and tilted rectangles.
- Adds a daily archive and a difficulty picker for the collection.
- Adds favorites, printable sheets, and playable page links to your finished compositions.
- Improves board response, saved progress recovery, and light and dark appearance.

### 1.1 — 2026-09-30

- Adds 46 languages
- Fixes the completion sheet appearing after undoing a solve or leaving the page
- Performance & reliability improvements

### 1.0 — 2026-09-29

No release notes.

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## More apps by Neeraj Aggarwal

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All apps by Neeraj Aggarwal: https://appshunter.io/developer/1877631231

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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 2026-10-21.*