13 Orphans Calculator
Mahjong Scoring and Tracker
Only for iPhone
Free · In‑App Purchases
iPhone
13 Orphans Calculator helps you score Mahjong hands and keep games moving at the table.
Score hands across Riichi, MCR / Chinese Official, Hong Kong, and Taiwanese Mahjong, with support for custom rule profiles.
Build your completed hand, enter the relevant scoring details, and review the result with clear point and payment information. Game tracking tools help tables record wins, draws, rounds, dealer changes, and score movement without needing an account.
Designed for real Mahjong tables, 13 Orphans Calculator keeps the scoring process organized so you can spend less time calculating and more time playing.
Features include:
• Riichi Mahjong scoring
• MCR / Chinese Official scoring
• Hong Kong Mahjong scoring
• Taiwanese Mahjong scoring
• Custom rule profiles
• Hand building and score calculation
• Game and score tracking
• Local-first play with no account required
Optional Pro features are available through a one-time lifetime unlock.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
What's New in Version 1.0.3
• Added banner and full-screen advertisements at natural stopping points for Free users.
• Existing Paid Unlock users continue enjoying an ad-free experience.
• Improved Game Tracker reliability and saved-game resume across Mahjong rule sets.
• Fixed Taiwanese Live Table scrolling and improved access to game controls.
• Improved purchase restoration, privacy controls, and iOS stability.
The developer, KEVIN ALLEN GONZALES ONG, 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 Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Identifiers
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Purchases
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- KEVIN ALLEN GONZALES ONG
- Size
- 47.5 MB
- Category
- Utilities
- Compatibility
Requires iOS 16.4 or later.
- iPhone
Requires iOS 16.4 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- 13 Orphans Pro Lifetime $4.99
- Copyright
- © 2026 Kevin Allen Gonzales Ong