# RPM - Pro Turntable Accuracy — Test RPM Speed Wow & Flutter > Mobile app for testing turntable RPM speed, wow, and flutter accuracy. (iPhone/iPad app by Philip Broder.) - Source: https://appshunter.io/ios/app/rpm-pro-turntable-accuracy/id1265756230 (this page in markdown: same URL + `.md`) - Developer: [Philip Broder](https://appshunter.io/developer/921385513) - Category: Music, Utilities - Price: $14.99 - Rating: 4.60/5 from 136 App Store ratings · 10 written reviews indexed - Age rating: 4+ - Requires: iOS 11.1 · 24 MB - Languages: American English - Released: 2017-08-01 - Data updated: 2026-08-30 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/rpm-pro-turntable-accuracy/id1265756230/reviews.md ## What is RPM? The best Turntable RPM accuracy test mobile app available. Full functionality, no ads or in-app-purchases. See the RPM speed variations, wow/flutter, of your turntable in real time graphics like you've never seen before, continuous display makes it easy to make adjustments as necessary if your turntable allows it. Test the RPM speed and wow/flutter accuracy of your turntable, whether 16, 33 1/3, 45, or 78. And now with the Worldwide RPM Turntable Accuracy Database you can research what other RPM users are finding out about their turntable's accuracy and what they think of them. ● RPM is proud to be recommended by Rega Research Ltd, makers of some of the best turntables in the world. ● Great review by Techmoan on Youtube ● Used in high end TT reviews in Stereophile magazine See the wow/flutter accuracy as the max % deviation from the average rpm of the turntable, as well as graphically in the chart. Save all your rpm test sessions to the history log for review or sharing later. RPM uses the gyroscope in your iPhone to determine the rotation speed of your turntable, automatically determines which speed setting you're on, and reports how accurate it is. Simply place your iPhone on your turntable, close to the centre but doesn't have to be over the centre spindle. As the iPhone rotates the display will remain stationary from your perspective for easy reading. The UNIQUE feature of RPM is that it shows a scrolling graph of the rpm accuracy variation over time, this shows wow/flutter effects, especially those associated with the turntable not being level, belt wear, etc. You can even detect the small drag caused by the stylus resting in the grooves of the record. The most recent amazing new innovative feature is to visualise wow and flutter variations plotted around the vinyl centre to show a heat map of exactly where in the turntable rotation inaccuracies occur. There are many ways of testing the average RPM of your turntable, some turntables even have this built in, however there is no other practical way of showing the wow/flutter variation over time than RPM. The history graph parameters can be customised to: - Set the moving average sample size. - Accuracy at which to turn the rpm circle sold green. - Set a duration after which the display updates will freeze so they can continue to be read after the turntable is stopped. The RPM realtime display is reliant on the iPhones gyroscope accuracy, if you suspect yours isn't quite right then you can now use Calibration Mode to auto test and then apply any necessary correction in real time. This auto calibration uses the compass to count the turntable revolutions, if you have an older iPhone (not iPhone 6S or newer) then this may be unreliable, in this case you can still add your own multiplier if you have done an independent calibration. Extensive testing means we're now confident that using RPM can help you setup your turntable to be within 0.1% of its target RPM, assuming your turntable can be adjusted and is itself stable within that tolerance of course. V3 brings The World RPM Turntable Performance Database, accepting submissions from RPM users worldwide to build the ultimate resource for researching the most accurate turntables out there. Upgrade to join in and upload your own turntable data, go to Settings and make sure you have the Freeze time set then do an RPM session as normal. At the end of the time you will be asked to name your session after which you will have the option to also upload it to the World DB. You can always upload from History later too." ## Key features - Real-time RPM speed testing - Wow and flutter detection - Graphical display of variations - Support for multiple speeds (16, 33 1/3, 45, 78) - Worldwide RPM Turntable Accuracy Database - History log for saved sessions - Calibration mode for gyroscope accuracy ## Recent user reviews (10 of 10) All indexed reviews: https://appshunter.io/ios/app/rpm-pro-turntable-accuracy/id1265756230/reviews.md ### 5/5 — Great *2025-04-18, version 3.9* Great app, easy to use and so much easier than trying to figure out an alternative way to do this. Remember to place over the center of the spindle elevating it with a roll of masking taped or something similar. ### 1/5 — App freezes once starts measuring *2021-10-29, version 3.7* The free version worked ok but it was very annoying to have a message pop up every few seconds so I took a chance on the paid version. At $14.99 I was hoping for something that would work just the same as the free version but without nags. Unfortunately it just freezes either at the start of measurement or the end. ### 5/5 — RPM *2021-08-21* Super Teil!! ### 5/5 — This is the only method I trust. *2021-01-17* I don’t trust the strobes and this is the easiest way to get an accurate reading. Enjoy! Thank you for publishing this! **Developer response:** Thanks for the great feedback! ### 5/5 — very good tool 👍🏼🙋🏻‍♂️ *2020-12-08* ⭐️⭐️⭐️⭐️⭐️ **Developer response:** Thanks for the great feedback, glad to hear RPM is helping you. ### 5/5 — Useful for Quick Turntable Setup ! *2020-11-21* Very easy to use, helps a lot to properly setup turntable speed ! ### 5/5 — TT Speed Dialed In *2020-02-29, version 3.5* I was able to really dial in the speeds on my Fluance RT81 turntable. This is one of the best apps out there and practical. ### 5/5 — Gut brauchbar für eine schnelle Überprüfung. *2019-10-11* Einfache intuitive Oberfläche. Mit meinem IPhone 7 erstaunlich akkurat. ### 5/5 — Great app *2019-06-20, version 3.5* Love the ease of checking and adjusting my TT rpm with this app. I also love looking thru the database to see other models. My only complaint is that the database could use some curating. There are some obviously bad data points. For example large w&f numbers where the graph shows data loss (flat lines). Would also be nice if the models could be forced to use consistant naming. There are probably 10 variations of at lp120 in the database. Still and excellent feature and usefull for researching TT’s. ### 3/5 — Good idea, but.... *2019-05-06* Good idea but the indicated speed can vary by several tenths depending on where you place your phone on the turntable, so You can’t ever treat the results as 100% accurate. This is likely to be a limitation of using gyroscopes, so probably can’t be improved. Which makes this app overpriced considering the technical limitations it can’t overcome. **Developer response:** Thanks for your feedback. It is recommended that the most accurate and reproducible results will be obtained by placing the phone directly over the centre of the platter. Placing off centre will imbalance the platter and definitely have an affect on rpm and w/f accuracy. I don’t see this as a technical limitation of gyroscopes just a necessary understanding of how to get the best out of using any measuring equipment. I appreciate your comment though and will look to clarify the usage instructions more. ## Frequently asked questions about RPM ### What does the RPM - Pro Turntable Accuracy app do? This app tests the accuracy of your turntable's rotational speed (RPM) and detects variations like wow and flutter. It uses your iPhone's gyroscope to provide real-time graphical feedback, helping you make necessary adjustments for optimal sound quality. ### What are the key features of this turntable testing app? Key features include real-time RPM speed testing, graphical display of wow and flutter, support for all standard turntable speeds (16, 33 1/3, 45, 78 RPM), a database to compare your turntable's accuracy with others, and a history log to save and review test sessions. ### Is this app free to use? Yes, the app is completely free to use. It offers full functionality with no advertisements or in-app purchases, ensuring an uninterrupted testing experience. ### What devices is this app compatible with? The app is designed for iPhones and relies on the gyroscope's accuracy. While it works best with newer models (iPhone 6S or newer), older iPhones can still be used, potentially with manual multiplier adjustments if gyroscope accuracy is a concern. ### How can I use this app to improve my turntable's sound? By using the app to test your turntable's RPM speed and wow/flutter, you can identify issues such as uneven rotation, belt wear, or an unlevel turntable. The real-time graphics and historical data allow you to make precise adjustments to achieve a stable and accurate playback speed, enhancing your listening experience. ## Version history (last 5 releases) ### 3.9 — 2022-04-05 Vastly improved download speed of the Worldwide Turntable database ### 3.8 — 2022-01-27 Performance enhancements - the RPM World DB is now fetched at a lower to improve the performance for everyone. The RPM World TT DB now has over 8,100 entries and has become an important resource for all Turntable enthusiasts. ### 3.7 — 2020-10-13 Due to popular demand the World TT Database is now searchable by make and model. There are now nearly 5000 uploads of turntable accuracy data and ratings from turntable enthusiasts all around the world. Updated settings screen with more help. Added additional onboarding help screens. For those testing old 16rpm turntables the accuracy results have been corrected to calculate against 16 2/3 rpm, oops! ### 3.6 — 2020-03-13 World DB Stats now shows Top 50 Makes & Models iOS13 Ready ### 3.5 — 2019-03-14 minor bug fix ## Apps similar to RPM | App | Rating | Price | Category | | --- | --- | --- | --- | | [RPM - Turntable Speed Accuracy](https://appshunter.io/ios/app/rpm-turntable-speed-accuracy/id1030889902) | 4.4 (1,665) | Free | Music | ## More apps by Philip Broder - [Sensor Play - Data Recorder](https://appshunter.io/ios/app/sensor-play-data-recorder/id921385514) - [Level17 The Accelerometer Game](https://appshunter.io/ios/app/level17-the-accelerometer-game/id975633773) - [ATX Trail - never get lost or thirsty on Austin's Town Lake trail ever again.](https://appshunter.io/ios/app/atx-trail-never-get-lost-or-thirsty-on-austins-town-lake-trail-ever-again/id1029973695) - [RPM - Turntable Speed Accuracy](https://appshunter.io/ios/app/rpm-turntable-speed-accuracy/id1030889902) - [Offset - abstract art from your photos instantly.](https://appshunter.io/ios/app/offset-abstract-art-from-your-photos-instantly/id1031638768) - [SetBoss - Manage your band's setlists and create multi-track demo ideas.](https://appshunter.io/ios/app/setboss-manage-your-bands-setlists-and-create-multi-track-demo-ideas/id1051031638) All apps by Philip Broder: https://appshunter.io/developer/921385513 ## Related topics [turntable club](https://appshunter.io/ios/topics/turntable-club) · [rpm records](https://appshunter.io/ios/topics/rpm-records) · [turntableanalyzer](https://appshunter.io/ios/topics/turntableanalyzer) · [rpm speed turntable](https://appshunter.io/ios/topics/rpm-speed-turntable) · [wow and flutter turntable rpm](https://appshunter.io/ios/topics/wow-and-flutter-turntable-rpm) · [platterspeed](https://appshunter.io/ios/topics/platterspeed) · [turntable speed](https://appshunter.io/ios/topics/turntable-speed) · [rpm record player tester](https://appshunter.io/ios/topics/rpm-record-player-tester) · [rpm speed and wow](https://appshunter.io/ios/topics/rpm-speed-and-wow) · [turntable rpm](https://appshunter.io/ios/topics/turntable-rpm) · [turntable mixing](https://appshunter.io/ios/topics/turntable-mixing) · [rpm meter for turntable](https://appshunter.io/ios/topics/rpm-meter-for-turntable) --- *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 2026-08-30.*