Comparison

Audio Unit Player vs Loop Slower

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

Head to head
About

Audio Unit Player

This music player offers real-time audio processing, including time stretching, pitch shifting, and a 31-band equalizer. It supports AUv3 effects and allows for A-B loop playback, making it ideal for practice, transcription, and performance adjustments.

Highlights
  • Real-time time stretch (50-200%)
  • Real-time pitch shift (-12 to +12 semitones)
  • 31-band equalizer with presets
  • AUv3 effects support
  • A-B loop playback
  • Background playback
  • Audio file export
Read full description

This app is a music player that can process the following effects in real time. - Time stretch (0.5-2.0 double speed) - Pitch shift (-1 ~ +1 octave) - 31 band equalizer - Reverb - AUv3 (Audio Unit v3) host [Use cases] - Karaoke's training. (Can be changed speed units of 10%, pitch shift in semitones easily) - Can playback at reduced tempo to copy phrase for guitar or bass, the keyboard instrument. - Can playback by changing the pitch to play by changing the key in the band performance (Developer himself has experience). [Function] - Perform time stretch (50 - 200%) / pitch shift (-12 - +12) in real time. - 31 bands EQ (Hz: 20, 25, 31.5, 40, 50, 63, 80, 100, 125, 160, 200, 250, 315, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.15k, 4k, 5k, 6.3k, 8k, 10k, 12.5k, 16k, 20k). - EQ preset (Abundant Built-in Presets / Custom Presets). - Reverb: Adjustable decay time (Low freq, High freq) / 13 presets - Reverb preset (Built-in Presets / Custom Presets) - Can be used as an AUv3 host. - A-B loop playback. - Center Cancel / Center Emphasis. - Lch, Rch each mute. - Quick fast forward, rewind (specify the number of seconds). - Check and set current position graphically in wave view. - Supports Auto-Lock ON/OFF. - Supports background playback. - Supports export (file writing) function (Each effect (speed/pitch/EQ) value set for each song is also reflected. The range specified in the loop section is output.) In addition to loading "music" data included in the standard music app, it also supports the function to import audio files from other apps ("Voice Memos" etc.). [How to import from "Voice Memos"] 1. Start the app "Voice Memos" and tap the mark "..." of the file to be imported from the list. 2. Tap "Share" on the sheet displayed from the bottom. 3. Tap "More" found by scrolling the displayed list of sharing destination apps to the right. 4. Select "AU Player" if available. The file is copied to this app. ================================================ [Note 1] This application will not be able to read songs of the following formats. - Songs from Apple Music, iCloud, iTunes Match - Songs that are protected by digital copyright (DRM) [Note 2] Depending on the state of your device, your custom AUv3 effects may not appear in the list. As a solution, you can solve the problem by starting "GarageBand" once and restarting this app. ================================================

About

Loop Slower

Features
Read full description

A simple tool that allows you to loop a section of a song and adjust the playback speed. Perfect for anyone who’s practicing an instrument and want to jam along at desired speed, or when transcribing a song. The app offers: - Changing playback speed - Looping particular section of a song - Saving loops and speed per song automatically - Searching and playing songs from your library (on device) - Searching and playing songs on Apple Music* - Recently played songs for quick access * playing full songs on Apple Music requires an active Apple Music subscription.

Screenshots

Audio Unit Player3 screens
Loop Slower4 screens

Verdict

The call

The clearest difference is price: Audio Unit Player at Free against Loop Slower's $0.99. Audio Unit Player also leads on update cadence (every 2 weeks vs every 12 months). Loop Slower's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

Audio Unit Player is free to download; Loop Slower costs $0.99 up front. Audio Unit Player sells 1 one-off in-app purchase. Loop Slower asks for nothing beyond the download.

UpkeepUpdate frequency

Audio Unit Player ships an update every 2 weeks, Loop Slower every 12 months. The most recent releases landed on September 21, 2026 and September 3, 2026 respectively.

Scorecard4 real differences · 6 level
Audio Unit Player versus Loop Slower: the parameters behind the verdict, then further details
ParameterAudio Unit PlayerLoop Slower
PriceFree — better$0.99
Rating3.9 (30 ratings) — better—
Positive reviews66.7% of reviews—
Number of ratings30 — better—
Update frequencyEvery 2 weeks — betterEvery 12 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationPaid—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.1
Further details — not scored
Size5 MB5 MB
Age rating4+9+
DeveloperLoop-Sessions.LLC.Algirdas Gridziuska

In-app purchases

1 purchases

Audio Unit Player

One-time1
  • Always remove banner ads.$3.99
None

Loop Slower

No in-app purchases

Questions

Is Audio Unit Player free?
Audio Unit Player is free to download, with in-app purchases available.
Is Loop Slower free?
Loop Slower costs $0.99, with no in-app purchases.
Do Audio Unit Player or Loop Slower have ads?
Audio Unit Player shows ads; Loop Slower does not.
Which is updated more often, Audio Unit Player or Loop Slower?
Audio Unit Player ships an update every 2 weeks, and Loop Slower every 12 months. Most recently, Audio Unit Player was updated on September 21, 2026 and Loop Slower on September 3, 2026.

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