mimiCopy vs Extrack
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
mimiCopy
This music player allows musicians to slow down tracks without altering pitch, set loops, and rewind quickly to learn songs by ear. It also supports importing music from your library and offers file import via WiFi or USB.
- Slow down playback without pitch change
- Set A-B loops
- Waveform view
- Quick rewind function
- Import from iPod library
- File import via WiFi/USB
Read full descriptionHide full description
**If you can not access the music library on iOS10, check that mimiCopy is ON in "Settings" in "Privacy" -> "Media Library". mimiCopy is a music player that helps guitarists and other musicians 'learn by ear' a track of their choice. You can playback at slower speed without any change in pitch, or use the waveform view to skip to a particular segment or set a loop. You can also load your favorite track from your iPod library! Main features - Time stretch function for playing back at different speeds without any change in pitch. Ideal for slow playback of fast phrases. (Features the high-quality time stretch engine(*1)) (speed controlrange:25%-200%) - pitch shift function. Adjustment range: ±1 octave - Waveform view for easily skipping to a desired segment or setting a (A-B)loop. - Simple (A-B)loop setup by tapping the start and end positions during playback. Loop intervals can be set to three locations. - Quick rewind function for going back to replay just the few seconds that you've missed. - Supports importing of tracks from your iPod library.(*2) - File import via WiFi or USB. - Option to disable Auto-Lock while the main view is open. - Universal app (supports iPhone, iPod touch, and iPad). - Memo function. - Flexible audio routing. mimiCopy has its own volume control. It can also adjust the right and left volume. or can change the right and left channel. - Intuitive and hassle-free interface. Let mimiCopy be your handy sidekick in your music life. * Some functions are features of the Pro version. Pro version users must register (registration is free). Suggested Usage - Transcribe speeches, interviews, conferences, etc. - Enjoy seminars and podcasts at faster (or slower) speed. (High-quality time stretch engine makes listening easier than with iPod's generic 1/2x and 2x playback) --- If mimiCopy shows "unknown error", try following: http://support.apple.com/kb/HT4211?viewlocale=en_US --- When the dialog of opening cannot be closed, please force the app to close or reboot your device. . Force the app to close: 1. From the Home screen, double-click the Home button to display recently used apps. 2. Tap and hold the app until a red minus appears. Tap the red minus to quit the app. 3. Tap on the Home screen, above, to return. ---- Became a fan of mimiCopy on Facebook! http://www.facebook.com/mimiCopyApp (*1)Featuring the time stretch engine by P SOFTHOUSE Co.,Ltd. (*2)DRM protected files(Song bought from iTunes) are not supported. iTunes Plus files are supported. Other files may not be supported depending on the encoding format.
Extrack
Instantly split songs into individual instrument parts and analyze chords in real-time. Adjust volumes, practice "minus one" style, and visualize chord fingerings for guitar or piano. Perfect for musicians of all levels looking to jam along with their favorite tracks.
- Instrumental stem separation
- Real-time chord analysis
- Adjustable instrument volumes
- Practice 'minus one' mode
- Visual chord fingering guides
- Tempo and key adjustment
- Section looping
Read full descriptionHide full description
Play along with your favorite tracks. Extrack, an app that lets you split instruments and analyze chords, instantly. -You can use the basic features for free with no time limit. Subscribe, and you can unlock more advanced features. ・Separate songs into different instrument parts (vocal, guitar, piano, bass, drums, wind instruments) and freely adjust their volumes. ・Practice "minus one" style (mute one part and play it yourself). ・See the chords and how to play them on guitar or piano in real time while the song plays. ・Change the tempo, keys, or repeat specific sections easily. The app is very easy to use, even for beginners. ■When you feel like jamming with a band! -Load any song from your smartphone or tablet, and Extrack automatically separates it into each instrument part — such as guitar, drums, bass, piano, and wind instruments like saxophone. You can adjust the volume of each part freely, just the way you like. -If you’re a guitarist, turn down the other instruments and focus on the guitar sound to pick up even the most subtle phrase by ear. Then, switch the mix up, mute the guitar part and jam along with the rest of the band. It’s the closest thing to being on stage with your favorite artists! Want to tighten your rhythm? Turn up the drums and bass for focused practice. Or mute the vocals and enjoy singing along karaoke-style with real band sound! ■When you feel like jamming to that song you love! -Extrack automatically analyzes and displays the chord progression of any song. Even if you’re not good at figuring out chords by ear, you can enjoy jamming while watching the chords in real time. -It also shows how to play each chord on guitar or piano visually so even beginners who can’t read sheet music can feel confident. -Just load a song, and you can start practicing right away! If the song has chords that are too difficult, simply change the key or set a capo to make them easier to play. ■When you’re stuck on a part you’re having trouble with. -Want to play just one phrase over and over? -Want to slow down the tempo and practice carefully? -With Extrack, you can do it all easily. Simply select the section you want to repeat, skip by measure, or adjust the playback speed to match your pace. Plus, Extrack comes with a built-in metronome that automatically syncs with the song’s tempo, perfect for training your timing and rhythm. ■Just load your favorite song, and enjoy practicing with all of Extrack’s features. -Works with : MP3, AAC, FLAC, and more. -Add songs from iTunes or your CDs and start playing! - You can even import songs directly from cloud storage services.
Screenshots
Verdict
The clearest difference is price: Extrack at Free against mimiCopy's $4.99. mimiCopy's advantage is review sentiment (70% vs 37%) and rating (4.2 vs 3.8). On ratings volume, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Extrack is free to download; mimiCopy costs $4.99 up front. mimiCopy sells 1 one-off in-app purchase and Extrack sells 2 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.
mimiCopy holds the better App Store score, 4.2 against 3.8. Both are backed by a comparable volume of ratings — 10 and 24 respectively. Written reviews point the same way: 70% of mimiCopy's written reviews are positive against 37% of Extrack's.
mimiCopy ships an update every 2 months, Extrack every 6 weeks. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.
| Parameter | mimiCopy | Extrack |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 4.2 (10 ratings) — better | 3.8 (24 ratings) |
| Positive reviews | 70.5% of reviews — better | 36.8% of reviews |
| Number of ratings | 10 | 24 — better |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Freemium |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 6 MB | 604 MB |
| Age rating | 4+ | 4+ |
| Developer | ART Teknika Inc. | Yamaha Corporation |
Customer experience
mimiCopy
Extrack
In-app purchases
mimiCopy
- Upgrade to Pro version$4.99
Extrack
- Monthly Plan7 Days trial$5.991 Month
- Yearly Plan7 Days trial$39.991 Year









