KeyTempo vs Audelier
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
KeyTempo
Adjust music pitch and tempo in real-time without affecting the other. Loop sections for practice or slow down audio for learning. Save your adjusted tracks as new files. Works offline with an intuitive interface.
- Real-time pitch control
- Real-time tempo control
- A-B repeat looping
- Export adjusted audio
- Supports multiple audio formats
- Offline functionality
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A music player that lets you independently adjust pitch and tempo in real time. Key Features - Pitch control: -12 to +12 semitones (keeps original speed) - Tempo control: 50% to 150% (keeps original pitch) - A-B repeat: Loop any section for focused practice - Export: Save adjusted audio as a new file Perfect for - Musicians practicing at slower speeds - Singers adjusting song keys - Students repeating difficult sections - Language learners slowing down audio Why KeyTempo? - No ads - Focus on your practice - Intuitive UI - No complicated settings - Real-time control - Change pitch/tempo without interruption - Works offline - No internet needed - No sign-up required - Install and start using immediately Supports MP3, M4A, WAV, FLAC, AAC and more.
Audelier
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Welcome to Audelier, your specialized digital audio studio workshop. Built so you can listen to your music the same way you listen to podcasts faster than 1x speed. Audelier gives you complete structural command over your local music playback. Transform any track to fit your lifestyle. Speed up songs to power through your playlists faster, slow down a lightning fast guitar solo to learn it note for note, shift a song cleanly into your natural vocal range, or amplify an audio file to cut through background noise. Audelier provides clean, real time digital signal processing without destroying your audio quality. Do you love listening to just the beginnings of songs? Now you can automatically skip forward after a set threshold. Change songs every 60 seconds for the ultimate Power Hour. TECHNICAL FEATURES PROFESSIONAL DSP MODIFIERS Speed Scaling Shift playback tempo dynamically from a slow 0.25x up to a rapid 3.0x without altering your tracks pitch layers. Pitch Shifting Step shift key tuning configurations up or down without impacting playback speed. Volume Boost Utilizes an integrated digital signal processing DSP equalizer stage to safely provide up to 24 dB of true sound wave amplification beyond standard file thresholds. INTUITIVE PRACTICE AND PLAYBACK TIMING Dual Progression Tracking Calculate true time spent listening relative to your active speed modifiers. Advance After Thresholds Set precise milestone listening intervals up to 180 seconds. The moment your active listening duration hits your target, the engine automatically sequences to the next track. SEAMLESS LOCAL QUEUE MANAGEMENT Media Library Integration Import entire track selections natively and instantly from your devices local system music collection framework. Please Note Audelier integrates directly with your local, on device audio files. Cloud managed streaming catalog assets such as Apple Music streaming subscriptions are protected by DRM and cannot be processed by the local audio engine.
Screenshots
Verdict
KeyTempo and Audelier 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | KeyTempo | Audelier |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 10 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 1 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | DONG CHEOL HAN | Kyle Newman |
In-app purchases
KeyTempo
No in-app purchases
Audelier
No in-app purchases








