# Ruan Tuner-Tuner for Ruan — Precise & Easy Plus metronome > Ruan tuning app with visual pitch indication and multiple modes. (iPhone/iPad app by Hsing-Fu Hsueh.) - Source: https://appshunter.io/ios/app/ruan-tuner-tuner-for-ruan/id1286711956 (this page in markdown: same URL + `.md`) - Developer: [Hsing-Fu Hsueh](https://appshunter.io/developer/1103119781) - Category: Music, Utilities - Price: Free with in-app purchases - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 12.1 · 40 MB - Languages: American English, Arabic, French (France), German (Germany), Hindi, Indonesian, Japanese, Korean, Brazilian Portuguese, Russian and 6 more - Released: 2017-09-22 - Data updated: 2026-06-30 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/ruan-tuner-tuner-for-ruan/id1286711956/reviews.md ## What is Ruan Tuner? [Ruan Tuner] The simple user interface with noise filtering can help you tuning the 4 strings without any setting while activating the APP. When you pull the Ruan string, the pitch will be shown on the panel for the individual string by indicating signal high or low. 
 [Function Description] ▪ Calibrate Piano Sound : Click on an open string then calibrate the sound with your Ruan. Piano Sound A4=442. ▪ A4 Frequency adjustment: choose 428~452 frequencies for A4 string. ▪ Total 12 kinds of tuning modes are available including : C,G,F,D,bB,A,bE,E,bA,B,#F,#C. ▪ The scale for precision tuning is 10 cents for every sub-bit. The blue line represents the open strings start from. The green arrow means pitch is accurate and it will turn white once the pitch difference exceeds more than a sub-bit. ▪ The complete function, will visually tell you the pitch is good or not by lighting green or white. Users can easily adjust the string by the lighting arrow shown on the scale. 
 We welcome you to feedback us for any questions, suggestions and comments regarding this APP. ## Key features - Simple user interface - Noise filtering for accurate tuning - Visual pitch indication for each string - Calibrate piano sound (A4=442) - Adjustable A4 frequency (428-452 Hz) - 12 tuning modes - Precision tuning scale (10 cents) ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | All Function&No Ad | $0.99 | one-time | ## Frequently asked questions about Ruan Tuner ### What is Ruan Tuner? Ruan Tuner is a mobile application designed to help users precisely tune their Ruan instrument. It features a simple interface with noise filtering and visual feedback to indicate pitch accuracy for each string. ### Does Ruan Tuner have ads? Yes, Ruan Tuner contains advertisements. This allows the app to remain free for users while offering its tuning functionalities. ### What tuning modes does Ruan Tuner offer? Ruan Tuner provides a total of 12 different tuning modes, including C, G, F, D, bB, A, bE, E, bA, B, #F, and #C, catering to various playing styles and preferences. ### Can I adjust the A4 frequency on Ruan Tuner? Yes, Ruan Tuner allows you to adjust the A4 frequency within a range of 428 to 452 Hz. This flexibility helps in tuning to different standards or personal preferences. ### How does Ruan Tuner indicate pitch accuracy? Ruan Tuner uses a visual scale where a green arrow signifies accurate pitch. If the pitch difference exceeds more than a sub-bit, the arrow turns white, providing clear feedback for string adjustments. ### What devices is Ruan Tuner compatible with? Ruan Tuner is compatible with iPhone, iPad, and iPod devices. It is designed for iOS users who play the Ruan. ### How often is Ruan Tuner updated? The latest version of Ruan Tuner was released on April 15, 2022. While specific update frequency isn't detailed, this indicates ongoing development and support for the application. ### What is the age rating for Ruan Tuner? Ruan Tuner has an age rating of 4+, making it suitable for a wide range of users. This indicates no mature content is present in the application. ## Version history (last 5 releases) ### 3.3 — 2022-04-15 - Different screen size devices, user interface and display ratio optimization - Metronome adds recording function and 3 sets of commonly used setting - Bug fix ### 3.2 — 2019-10-24 Bug fixes for iOS 13 ### 3.1 — 2018-10-25 bug fix ### 3.0 — 2018-10-21 Increase the metronome Adjust UI ### 2.1 — 2018-05-18 Looping reference sounds. ## Apps similar to Ruan Tuner | App | Rating | Price | Category | | --- | --- | --- | --- | | [Tuner B2](https://appshunter.io/ios/app/tuner-b2/id6755300645) | 4.5 (19) | Free | Music | | [民乐调音大师 - 快捷专业调音器](https://appshunter.io/ios/app/id1314138563) | 4.9 (11) | Free | Music | | [琵琶调音器](https://appshunter.io/ios/app/id6504570145) | 4.4 (9) | Free | Music | | [Twelve-Tone Tuner](https://appshunter.io/ios/app/twelve-tone-tuner/id1448477362) | 4.4 (57) | Free | Music | | [咕嘟调音](https://appshunter.io/ios/app/id6472655506) | — | Free | Music | | [民乐调音器](https://appshunter.io/ios/app/id1051215759) | 4.2 (10) | Free | Music | ## More apps by Hsing-Fu Hsueh - [Erhu Tuner - Pitch](https://appshunter.io/ios/app/erhu-tuner-pitch/id1103119782) - [Violin Tuner - Pitch](https://appshunter.io/ios/app/violin-tuner-pitch/id1185155196) - [Viola Tuner - Pitch](https://appshunter.io/ios/app/viola-tuner-pitch/id1193544408) - [GuQin Tuner - Pitch](https://appshunter.io/ios/app/guqin-tuner-pitch/id1268477087) - [PiPa Tuner-Tuner for PiPa](https://appshunter.io/ios/app/pipa-tuner-tuner-for-pipa/id1268904834) - [SanXian Tuner-Tuner SanXian](https://appshunter.io/ios/app/sanxian-tuner-tuner-sanxian/id1268910012) All apps by Hsing-Fu Hsueh: https://appshunter.io/developer/1103119781 --- *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 2026-06-30.*