Comparison

Slow Player Lite vs Audio Unit Player

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

Head to head
About

Slow Player Lite

Learn new songs by adjusting playback speed and pitch without altering the original sound. This tool is ideal for musicians practicing instruments or anyone looking to improve their listening comprehension of foreign languages. It allows for precise control over playback sections and key.

Highlights
  • Adjust playback speed (75%-150%)
  • Change musical key
  • Set custom start and end times
  • Real-time seeking
  • Repeat phrases
  • Speed and key changes without pausing
Features
Read full description

This App is the Music Dictation Player and the fastest, and easiest way to learn new songs by slowing down or speeding up play back without changing the pitch! Works with guitar, bass, trumpet, piano, voice or any other instrument and 'learn by ear'. It can be used for the listening of the foreign language, too. Other features: - change speed without any change in pitch.(75% to 150%) - change key.(-6 to 6 semitone) - change start time, end time keeping length.(dragging the red range rectangle) - realtime seeking.(drag orange play button) - speed, key, start time, end time can change without music pause! - repeat phrases **Upgrade to full version to get the following features : - No Ads. - Change Speed.(50% - 200%) - Save Phrase. - Export AAC Format. **Warning - Does not work with DRM protected songs(m4p)

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. ================================================

Screenshots

Slow Player Lite2 screens
Audio Unit Player3 screens

Verdict

The call

The clearest difference is in-app purchases: Slow Player Lite at none against Audio Unit Player's 1. Slow Player Lite also leads on ads (none vs shown) and iOS requirement (6.0 vs 17.0). Audio Unit Player's advantage is ratings volume (30 vs 1) and review sentiment (67% vs 50%). On price, rating, update cadence and device support 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

Both are free to download. Audio Unit Player sells 1 one-off in-app purchase. Slow Player Lite asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.0 for Slow Player Lite against 3.9 for Audio Unit Player. That said, the two scores are not equally well evidenced: Audio Unit Player has 30 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 50% of Slow Player Lite's written reviews are positive against 67% of Audio Unit Player's.

UpkeepUpdate frequency

Slow Player Lite ships an update every 3 weeks, Audio Unit Player every 2 weeks. The most recent releases landed on October 16, 2026 and October 18, 2026 respectively.

Scorecard6 real differences · 4 level
Slow Player Lite versus Audio Unit Player: the parameters behind the verdict, then further details
ParameterSlow Player LiteAudio Unit Player
PriceFreeFree
Rating4.0 (1 ratings) — better3.9 (30 ratings)
Positive reviews50.0% of reviews66.7% of reviews — better
Number of ratings130 — better
Update frequencyEvery 3 weeksEvery 2 weeks — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad
Requires iOS6.0 — better17.0
Further details — not scored
Size6 MB5 MB
Age rating4+4+
Developerdotpico Inc.Loop-Sessions.LLC.

Customer experience

Slow Player Lite

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews58 reviews
Positive50.0%
Neutral12.1%
Negative37.9%

Audio Unit Player

All ratings30 ratings
Positive70.0%
Neutral6.7%
Negative23.3%
Written reviews48 reviews
Positive66.7%
Neutral4.2%
Negative29.2%

In-app purchases

None

Slow Player Lite

No in-app purchases

1 purchases

Audio Unit Player

One-time1
  • Always remove banner ads.$3.99

Questions

Is Slow Player Lite free?
Slow Player Lite is free to download, with no in-app purchases.
Is Audio Unit Player free?
Audio Unit Player is free to download, with in-app purchases available.
Which has better reviews, Slow Player Lite or Audio Unit Player?
Slow Player Lite is rated higher. Slow Player Lite averages 4.0 out of 5 from 1 ratings, while Audio Unit Player averages 3.9 from 30 ratings.
Do Slow Player Lite or Audio Unit Player have ads?
Audio Unit Player shows ads; Slow Player Lite does not.
Which is updated more often, Slow Player Lite or Audio Unit Player?
Slow Player Lite ships an update every 3 weeks, and Audio Unit Player every 2 weeks. Most recently, Slow Player Lite was updated on October 16, 2026 and Audio Unit Player on October 18, 2026.

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