# Grooves: Song Speed Changer — Speed up or slow down any song > Change song tempo without affecting pitch or fidelity. (iPhone/iPad app by Open Planet Software.) - Source: https://appshunter.io/ios/app/grooves-song-speed-changer/id592398757 (this page in markdown: same URL + `.md`) - Developer: [Open Planet Software](https://appshunter.io/developer/307887935) - Category: Music, Utilities - Price: $4.99 (on sale, was $6.99) - Rating: 3.70/5 from 94 App Store ratings · 150 written reviews indexed - Age rating: 4+ - Requires: iOS 18.6 · 3 MB - Languages: American English - Released: 2013-01-23 - Data updated: 2026-09-14 - Monetization: paid - User reviews in markdown: https://appshunter.io/ios/app/grooves-song-speed-changer/id592398757/reviews.md ## What is Grooves? SLOW DOWN AND SPEED UP ANY SONG Maybe you’re trying to learn a tricky guitar riff or figure out a new dance routine. Or maybe you want to change the speed of your favourite tracks to lock into the rhythm of your fitness workout. Grooves lets you continuously adjust the speed of any song in the Apple Music catalog, in your iPhone Music Library or Files app to a speed that’s right for you. PICK ANY SONG • Change the tempo of any song on Apple Music, in your Music app or Files app without affecting pitch or fidelity • Access the entire Apple Music catalog of over 100 million songs! • Play tracks from the Files app, including on Cloud Drive, Dropbox and other cloud services • Quick access to your recently played songs ADJUST THE TEMPO • A simple slider for adjusting tempo • Select any tempo from -50% to +100%, in 1% increments • Easily revert to the original tempo with just one tap • Grooves will remember your chosen tempo until you want to adjust it again CREATE SETLISTS • Create unlimited Setlists • Continuous play from one song to the next • Set and remember different tempos for different songs • Combine songs from Apple Music, your Music app and Files app all in the same Setlist • Create Setlists from existing albums and playlists in your Music app or on Apple Music REPEAT JUST ONE SECTION • Select a section of a song and then loop it to make practise easy • Add sections of a song to a Setlist multiple times and then play them back at different tempos APPLE WATCH • Easily control playback, tempo and volume from your wrist AIRPLAY • AirPlay support for output to wireless speakers or Apple TV AND MORE.. • Change the key (transpose up or down) of locally stored DRM-free songs imported into the app or from your Music app. (Missing the pitch controls from the last version? Re-enable them in the Settings app > Grooves. Then swipe left on the album artwork when playing a song) IMPORTANT NOTE! * Songs from streaming services other than Apple Music are not supported * ## Key features - Adjust tempo of Apple Music songs - Change tempo of local music files - Create unlimited playlists - Loop and practice song sections - Control playback from Apple Watch - Transpose key of DRM-free songs ## What do users think of Grooves? Overall sentiment: mixed **Pros** - 👍 Simple, intuitive user interface - 🎵 Works seamlessly with Apple Music - 🎸 Excellent for music learning and practice - ⏱️ Effective tempo adjustment without pitch distortion - 💪 Great for fitness classes and choreography - 🎓 Valuable tool for musicians and students - 📱 No subscription required, one-time purchase - 🔊 Maintains good audio quality when adjusted moderately - 💾 Supports personal music files and playlists - ⌚ Apple Watch integration available **Cons** - 🐛 Audio distortion at extreme tempo changes - 🐛 Frequent crashes and freezing issues - ❌ Playlist autoplay not working - ❌ Tempo settings don't persist across songs - 🔇 Sound quality issues at very slow speeds - ❌ Limited Apple Music integration history - 📱 Not available on Mac or Apple TV - 🔄 Loop feature unreliable and glitchy - ⏸️ Play/pause button sometimes unresponsive - 🎵 No Spotify support **Commonly reported bugs** - App crashes when searching songs - Loop function causes freezing - Pitch shift controls disappear in setlist mode - Pause button doesn't appear or respond properly - Loop overshoots end point and continues playing - Audio stutters during playback - Section repeat is janky and unreliable - Playback speed resets to 100% between tracks - App doesn't display songs from playlists - DRM-protected files show 'unable to play' error - Apple Music compatibility issues after updates - App freezes when adjusting tempo or skipping - Display won't turn off during playback **Most requested features** - Autoplay next song in playlist - Set default tempo for entire playlist - Display BPM information - Pitch shifting/transposition capability - Landscape orientation support - Waveform visualization for precise editing - Skip forward/backward buttons (15/30 seconds) - Mac and Apple TV app versions - Spotify integration - Lyrics display - Shuffle option for playlists - Save loop settings - Artist-based song lookup - Fine scrubbing with time index display - Continuous album playback without pauses - Export adjusted audio files - Reverb and audio effects ## Recent user reviews (10 of 150) All indexed reviews: https://appshunter.io/ios/app/grooves-song-speed-changer/id592398757/reviews.md ### 5/5 — Need two new features *2026-06-07* Very helpful and intuitive app. Two features will make this much more useful. (1) display the current bpm. (2) ability to export to mp3 if music is already an imported mp3 file or the drm tags allow it. Thanks for considering. This is worth additional payment imho 😊 ### 3/5 — A little limited *2026-05-28, version 37.0* I use this for running, I like matching my song tempo to my running cadence. I like that you can make playlists, but it drives me crazy that I can’t shuffle them. Please add a shuffle feature. Also, it’d be nice to just pick a BPM for all my songs rather than try and math the percentage increase or decrease for a specific BPM. ### 5/5 — Perfect App *2026-02-06, version 36.1* Does exactly what I hoped it would. Well worth the price. ### 5/5 — Fully Blind *2026-01-31, version 36.1* [2026.01.31] fully blind user 8+ years using this now for a few months and love it, only tiny complaint is no song lookup by artist, and it’s understandable but I wish there was one like in Apple Music, instead of search ### 3/5 — Good but I was looking for more *2026-01-04* I like the app but it doesn’t suit my needs. I can understand and overlook the slight change in sound when the tempo is adjusted. I can work with that. What I thought it could do was sync the whole playlist to the same tempo. I wanted to use it for a fitness class. But I will just go back to the way I was doing it and live with the slight changes in tempo for each song. If you ever add that feature, I would use it all the time. ### 5/5 — Works Great *2025-09-25* Overall these reviews are harsh and don’t seem fair so I wanted to counterbalance. Perfect Tempo has always worked great for me and does just what it says it will do. I do wish it had the ability to transpose as well, but otherwise it works flawlessly and I’ve used it to teach music, practice my own music, and more! Big fan! ### 5/5 — the best! *2025-09-23, version 35.5* I would not have progressed In guitar without this app! ### 5/5 — Choreographer’s Dream *2025-09-19, version 35.5* I am a choreographer and use this app every day while teaching. Slow it down a little (or a lot) at first, and gradually bring it up to full tempo. Such a great tool while teaching! ### 3/5 — スピードを速くすると音が割れる *2025-09-14* 長らく愛用しておりましたが、あるアップデート以降、再生速度を速くすると音割れが発生するようになり、ここ2年ほどは使用を控えております。 iPhone 16、13、12、X、7で定期的に試しましたが、いずれも高速再生時に音割れが確認できました。 ゆっくりにする分には問題ないため、今後のアップデートで改善されれば☆4に、さらにApple Watchで指定のプレイリストだけでなく全アルバムを操作できるようになれば☆5にしたいアプリです。 今後の進化に期待しています。 ### 5/5 — Great for dance setlists *2025-05-08, version 35.4* Perfect Tempo allows me to include fun songs that would be too fast for zouk. I’m no DJ and just want to play from my phone. I run a practica for once a week and this app has expanded the possible songs to dance to many fold. ## Frequently asked questions about Grooves ### What does Perfect Tempo do? Perfect Tempo allows you to change the speed (tempo) of songs without affecting their original pitch or sound quality. You can adjust over 100 million songs from Apple Music, your personal Music app library, or files stored in cloud services. ### Can I change the pitch of songs? Yes, you can change the key (transpose) of locally stored DRM-free songs imported into the app or from your Music app. Pitch controls can be re-enabled in the app's settings if they are not immediately visible. ### How much does Perfect Tempo cost? The application is a paid app. There are no advertisements or in-app purchases mentioned, indicating a one-time purchase for full functionality. ### What devices is Perfect Tempo compatible with? The app is designed for iOS devices and offers specific features like Apple Watch control and AirPlay support for wireless audio output. It integrates with Apple Music and your device's local Music app. ### Can I use Perfect Tempo for practicing music? Absolutely. You can select and loop specific sections of a song to practice them at a different tempo. This feature is ideal for musicians, dancers, or anyone learning a piece of music. ## Version history (last 5 releases) ### 37.0 — 2026-05-27 Welcome to Grooves! Grooves is the new name for Perfect Tempo. There's also a new app icon and the interface has a refreshed look with Liquid Glass. Grooves will never interrupt you to ask for a review - we don’t like being interrupted either! However, App Store ratings and reviews are important, so if you are enjoying Grooves and have a spare minute, we’d be delighted if you could leave a rating or review on the App Store. Thanks! ### 36.1 — 2026-01-30 Perfect Tempo 36.1 includes the following improvements: * Fixes an issue where duplicates could be created when selecting certain songs from Recents. * Fixes an issue where some Apple Music songs selected from the Music app library could not be played. Perfect Tempo will never interrupt you to ask for a review - we don’t like being interrupted either! However, App Store ratings and reviews are important, so if you are enjoying Perfect Tempo and have a spare minute, we’d be delighted if you could leave a rating or review on the App Store. Thanks! ### 36.0 — 2025-10-16 This update changes the behaviour of the loop button, making it consistent for single song and Setlist playback. The loop button now has three modes: * OFF: Plays a song from beginning to end. If the song is part of a setlist, it will automatically start the next song when the end of the current song is reached. * LOOP: Plays between the start and end markers continuously in a loop. * SECTION: Plays between the start and end markers once. If the song is part of a setlist, it will automatically move on to the next song when the end marker is reached. Perfect Tempo will never interrupt you to ask for a review - we don’t like being interrupted either! However, App Store ratings and reviews are important, so if you are enjoying Perfect Tempo and have a spare minute, we’d be delighted if you could leave a rating or review on the App Store. Thanks! ### 35.5 — 2025-09-18 Adds support for iOS 26. Perfect Tempo will never interrupt you to ask for a review - we don’t like being interrupted either! However, App Store ratings and reviews are important, so if you are enjoying Perfect Tempo and have a spare minute, we’d be delighted if you could leave a rating or review on the App Store. Thanks! ### 35.4 — 2025-01-09 Improved behaviour when switching between setlists and individual songs. Perfect Tempo will never interrupt you to ask for a review - we don’t like being interrupted either! However, App Store ratings and reviews are important, so if you are enjoying Perfect Tempo and have a spare minute, we’d be delighted if you could leave a rating or review on the App Store. Thanks! ## Apps similar to Grooves | App | Rating | Price | Category | | --- | --- | --- | --- | | [Slow Down Music \| Transcribe+](https://appshunter.io/ios/app/slow-down-music-transcribe-plus/id1048119179) | 4.5 (5,283) | Free | Music | | [Music Speed Changer ▶▶▶](https://appshunter.io/ios/app/music-speed-changer/id1595494271) | 4.8 (3,943) | Free | Music | | [Tempo SlowMo - BPM Slow Downer](https://appshunter.io/ios/app/tempo-slowmo-bpm-slow-downer/id460008289) | 2.8 (179) | Free | Music | | [Music Speed Changer-Transpose](https://appshunter.io/ios/app/music-speed-changer-transpose/id6447086413) | 4.5 (156) | Free | Music | | [AudioTweak: Change Music Speed](https://appshunter.io/ios/app/audiotweak-change-music-speed/id1546870809) | 4.5 (598) | Free | Music | | [TimePitch-Pitch, Speed Changer](https://appshunter.io/ios/app/timepitch-pitch-speed-changer/id1039713963) | 4.6 (1,937) | Free | Music | ## More apps by Open Planet Software - [Smoovie: Stop Motion Animation](https://appshunter.io/ios/app/smoovie-stop-motion-animation/id424224789) - [Just Press Record](https://appshunter.io/ios/app/just-press-record/id1033342465) - [SmoovieCam](https://appshunter.io/ios/app/smooviecam/id1057628728) - [Radiant Grid](https://appshunter.io/ios/app/radiant-grid/id1067853503) - [Sessions Nano](https://appshunter.io/ios/app/sessions-nano/id6761759837) All apps by Open Planet Software: https://appshunter.io/developer/307887935 ## Related topics [grooves](https://appshunter.io/ios/topics/grooves) --- *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 2026-09-14.*