Beat Time! vs Guitar Permutation Trainer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Beat Time!
This app allows musicians to practice and transcribe audio and video by changing tempo and pitch without affecting quality. It offers advanced features like note and chord detection, seamless looping, and annotation tools. Play content from various sources, including your device library and YouTube.
- Time stretch audio/video (1/4x to 2x)
- Pitch shift audio/video (up to 1 octave)
- Natural pitch shifting for voices
- Note and chord detection
- Seamless looping with optional pause
- Annotate tracks with markers
- Play YouTube videos
Read full descriptionHide full description
Beat Time plays audio & video and can change the tempo (time stretch) and/or pitch and does note & chord detection. It is aimed as a practice / study tool for musicians and as a helper tool for transcribing audio & video. Play audio & video from your iPod library, dropbox, iTunes file sharing or open from other apps. Reviews: "Beat Time! is a gem of an app that's just waiting for musicians around the world to discover it. It's almost to good to be true! You've got to check it out!!" Jordan Rudess Dream Theater/Wizdom Music. "I've used plenty of slow downer type apps, and this is among the best! It does what it says and does it well" Evp73 "It's amazing how you can hear virtually NO artefacts in the audio! Amazing!" jenius92000 Main app features: • Time stretch video and audio from 1/4x to 2x without affecting pitch. • Pitch shift audio and video up to an octave up or down. • Natural pitch shifting, pitch shift a male voice keeping it sounding male, pitch shift a female voice keep it sounding female. • High quality, state of the art, time stretching / pitch shifting using DIRAC technology. • Pitch analysis for note & chord detection. • Annotate the track with multiple markers. • Seamless looping of segments in the track. • Optionally pause between loops. • Easy file transfer: Open audio/video files from any app that supports iOS "Open In..." menu. • Play YouTube videos. • Open tracks from your iPod audio, video library or video camera roll • Export time stretched / pitch shifted audio or movies. • Universal application (iPhone/iPod/iPad). • Supports video and audio formats that are playable using iOS music/video player, including: mp4, m4v, m4a, mp3, WAV, mov, (AVI provided it's mpeg 4 encoded) See Jordan Rudess playing with Beat Time! at http://bit.ly/GO67NQ
Guitar Permutation Trainer
Read full descriptionHide full description
Guitar Permutation Trainer helps you practice finger permutations across your fretboard with a built‑in metronome and adaptive difficulty. Practicing permutation exercises on instruments like guitar, bass, and piano targets the small, intrinsic muscles of the hand and fingers, such as the lumbricals and interossei. These muscles are responsible for fine motor control, finger independence, and strength. Repetitive, structured movement patterns improve neuromuscular coordination by reinforcing neural pathways between the brain and fingers - a process known as motor learning. According to research in kinesiology and occupational therapy, consistent practice builds endurance and prevents overuse injuries by promoting balanced muscle development. For developing musicians, this foundation is essential for achieving speed, accuracy, and long-term technical reliability without strain.
Screenshots
Verdict
The clearest difference is update cadence: Guitar Permutation Trainer at every 3 days against Beat Time!'s every 3 weeks. Guitar Permutation Trainer also leads on price ($1.99 vs $6.99). Beat Time!'s advantage is chart position (#162 vs unranked). On ads, in-app purchases, device support and iOS requirement 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
Beat Time! costs $6.99 and Guitar Permutation Trainer $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Beat Time! ships an update every 3 weeks, Guitar Permutation Trainer every 3 days. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.
| Parameter | Beat Time! | Guitar Permutation Trainer |
|---|---|---|
| Price | $6.99 | $1.99 — better |
| Rating | 3.4 (72 ratings) — better | — |
| Positive reviews | 62.3% of reviews | — |
| Number of ratings | 72 — better | — |
| Update frequency | Every 3 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #162 — better | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 18.0 — better | 18.4 |
| Further details — not scored | ||
| Size | 44 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | Guy Shaviv | Benjamin Chouinard |
Bugs and requests
Beat Time!
Reported bugs
10 issues- YouTube video import fails with 'error reading file'
- App crashes when exporting audio files
- Black screen appears when loading YouTube audio
- Download button stops working without app restart
- Infinite buffering with 'Preparing for Playback' message
Show 5 moreShow fewer
- File open button stalls and doesn't respond
- Audio doesn't reload on app reopening
- Incompatibility with iOS updates (iOS 8, 10, 14)
- Video format compatibility issues (.mov files)
- Keyboard doesn't function properly
Requested features
10 requests- Reverse audio capability
- AU3 plugin option
- Dark mode interface
- Better file organization and alphabetical sorting
- Step forward/backward navigation buttons
Show 5 moreShow fewer
- Save loop markers with files
- Dropbox export integration
- Improved bookmark management system
- Percentage-based pitch control mode
- Better keyboard functionality
Guitar Permutation Trainer
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Beat Time!
No in-app purchases
Guitar Permutation Trainer
No in-app purchases
Questions
Is Beat Time! free?
Is Guitar Permutation Trainer free?
Do Beat Time! or Guitar Permutation Trainer have ads?
Which is updated more often, Beat Time! or Guitar Permutation Trainer?
Other comparisons















