Comparison

Beat Time! vs Guitar Permutation Trainer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Currently charting
Read 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

About

Guitar Permutation Trainer

Features
Read 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

Beat Time!2 screens
Guitar Permutation Trainer4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 8 level
Beat Time! versus Guitar Permutation Trainer: the parameters behind the verdict, then further details
ParameterBeat Time!Guitar Permutation Trainer
Price$6.99$1.99 — better
Rating3.4 (72 ratings) — better—
Positive reviews62.3% of reviews—
Number of ratings72 — better—
Update frequencyEvery 3 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank#162 — better—
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.0 — better18.4
Further details — not scored
Size44 MB3 MB
Age rating17+4+
DeveloperGuy ShavivBenjamin 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 more
  • 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 more
  • 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

None

Beat Time!

No in-app purchases

None

Guitar Permutation Trainer

No in-app purchases

Questions

Is Beat Time! free?
Beat Time! costs $6.99, with no in-app purchases.
Is Guitar Permutation Trainer free?
Guitar Permutation Trainer costs $1.99, with no in-app purchases.
Do Beat Time! or Guitar Permutation Trainer have ads?
Neither Beat Time! nor Guitar Permutation Trainer shows ads.
Which is updated more often, Beat Time! or Guitar Permutation Trainer?
Beat Time! ships an update every 3 weeks, and Guitar Permutation Trainer every 3 days. Most recently, Beat Time! was updated on October 14, 2026 and Guitar Permutation Trainer on October 10, 2026.

Other comparisons