Mahjong Helper & Calculator is an essential tool for both novice and experienced Mahjong players. This app simplifies the complex tasks of scoring hands and managing payments between players, making the game more accessible and enjoyable. It supports multiple scoring systems including European Classical, Hong Kong, Japanese Modern, and Chinese Official rules.

With its intuitive interface featuring beautiful, easy-to-read tiles and a user-friendly tile/set-type selector, players can effortlessly calculate scores. The app also offers various player modes and detailed score breakdowns, allowing users to learn and verify scoring methods. Additionally, it enables match history tracking, seat rotation settings, and cross-device match sharing, enhancing the overall Mahjong experience.

The Mahjong Helper & Calculator stands out with its comprehensive feature set tailored for Mahjong enthusiasts. One of its key features is the Hand Scorer/Calculator, which uses an innovative press, slide, and release mechanism for selecting tiles, streamlining the scoring process. It supports diverse rule sets such as European Classical, Hong Kong, Japanese Modern with Dora tiles and Red Fives, and Chinese Official (MCR/Competition) styles.

Another remarkable aspect is its flexible player mode options, accommodating 4, 3, and 2 player games. The Score Sheet function not only facilitates payment calculations but also supports 'Ready' declarations and counters in Japanese Mahjong. Moreover, the app allows score sharing across devices, ensuring all players can maintain match records and contribute to scoring from their respective Android or iOS devices, provided there's a data connection.

Mahjong Helper & Calculator offers a diverse range of content that caters to both beginners and experienced Mahjong players. The app supports multiple scoring systems including European Classical, Hong Kong, Japanese Modern / EMF Riichi, and Chinese Official (MCR / Competition), ensuring that players from different regions can enjoy the game according to their local rules.

One of the key features is the Hand Scorer / Calculator, which simplifies the often complex task of calculating hand values. With an intuitive tile and set-type selector, users can easily experiment with different scoring methods and gain a deeper understanding of the game mechanics. This not only enhances the learning experience but also keeps the gameplay fresh and engaging.

The app also allows for 4, 3, and 2 player scoring modes, making it versatile for various group sizes. Additionally, the Score Sheet function automatically calculates payments between players, supporting unique aspects of Japanese Mahjong such as Ready declarations and counters. This comprehensive approach ensures that all aspects of the game are covered, providing a complete Mahjong experience.

User engagement in Mahjong Helper & Calculator is significantly enhanced through its detailed and interactive features. The app's ability to maintain a history of matches played encourages users to track their progress over time, fostering a sense of achievement and encouraging longer play sessions.

Moreover, the app includes a Scoring panel that breaks down how scores are calculated. This feature is particularly beneficial for those new to Mahjong, as it aids in learning and verifying the rules, thus promoting sustained user interest. By allowing users to see exactly how their scores are computed, the app builds trust and transparency, which are crucial for retention.

Another standout feature is the cross-device match sharing capability. Players can share matches across Android and iOS devices, provided there is a data connection. This not only facilitates collaborative play but also enables friends and family to keep a record of their games and contribute to scoring from their own devices. Such social and interactive elements are vital for maintaining high levels of user engagement and ensuring that players return to the app regularly.