Paper Corners: Logic Puzzles
Shakashaka triangle brain game
Free · In‑App Purchases
222 Shakashaka pages in 22 chapters. The original 102 stay free. One Pro purchase unlocks daily pages and chapters 11 to 22.
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
- 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
The developer, Neeraj Aggarwal, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Identifiers
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Neeraj Aggarwal
- Size
- 6.2 MB
- Category
- Puzzle
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 43 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Paper Corners Pro $4.99
- Copyright
- © 2026 Augustus Works