Audio Unit Player vs TempoBench
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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. ================================================
TempoBench
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Put the song on your workbench, slow it down, and hear every note. TempoBench is a practice player built for musicians who transcribe by ear. Import an audio file or record a rehearsal, play it back at 25%–200% speed without changing the pitch, loop the tricky bars seamlessly, and zoom into the waveform to land exactly on a phrase. Features: - Time-stretch: 25%–200% playback speed, pitch stays put; changes apply instantly without interrupting playback - Pitch shift: ±12 semitones in steps, plus ±50 cents fine-tuning for off-pitch recordings; fully independent from speed - AB loops: tap in/out points for a seamless loop, nudge endpoints by milliseconds; save unlimited named loop regions, each remembering its practice speed - Waveform navigation: tap or drag to seek, pinch to zoom 1–16x - Flexible import: mp3 / m4a / wav / flac and more from the Files app or cloud drives; or record straight into the library - Practice memory: position, speed, pitch, loops and notes are saved per track and restored next time - Background playback with full Lock Screen and Control Center support Pricing, honestly: every feature is free and the library has no track limit — speed, pitch, AB loops, recording and saved regions are all included, with no paywalls anywhere. A single banner ad sits at the bottom of the screen; if it bothers you, a one-time Remove Ads purchase takes it away. It does not unlock anything new. No subscription, no account. Privacy: your audio, recordings, loop regions and notes all stay on this phone and are never uploaded. Practice works fully offline — the bottom banner is the only thing that needs a connection. No tracking, and no App Tracking Transparency prompt.
Screenshots
Verdict
Audio Unit Player and TempoBench are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Audio Unit Player sells 1 one-off in-app purchase and TempoBench sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
| Parameter | Audio Unit Player | TempoBench |
|---|---|---|
| Price | Free | Free |
| Rating | 3.9 (32 ratings) — better | — |
| Positive reviews | 66.7% of reviews | — |
| Number of ratings | 32 — better | — |
| Update frequency | Every 2 weeks | — |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Loop-Sessions.LLC. | 丽佳 施 |
In-app purchases
Audio Unit Player
- Always remove banner ads.$3.99
TempoBench
- Remove Ads$0.99
Questions
Is Audio Unit Player free?
Is TempoBench free?
Do Audio Unit Player or TempoBench have ads?
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