Keyboard Collection vs Stem Split
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Keyboard Collection
Practice playing piano, electric piano, and harpsichord on your mobile device. Features realistic instrument models, 4-octave keyboards, and multitouch support for chords.
- Realistic instrument models
- Interactive 3D view
- 4-octave keyboards
- Multitouch for chords
- Authentic polyphonic sound
- Optional note overlay
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Whether you're a complete beginner or a virtuoso, you can practise on the go with the Keyboard Collection, including Piano, Electric Piano and Harpsichord. Features * Realistic instrument models * Interactive 3D view * 4-octave keyboards * Multitouch for chords * Authentic polyphonic sound * Optional note overlay
Stem Split
This app separates any song into four audio stems: vocals, accompaniment, bass, and drums. All processing happens on your device, ensuring privacy and no uploads. You can then adjust the level, tempo, and pitch of these stems in real-time.
- Separate songs into 4 audio stems
- On-device processing
- Real-time level, tempo, and pitch adjustment
- Import from Files app and iTunes
- Supports WAV, AIFF, MP3, and MP4 formats
- Export stems for sharing and other apps
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With Stem Split you can separate any song into 4 high quality stems: vocal, accompaniment, bass and drums. All processing takes place on your device, using an advanced neural network, ensuring your data stays on your phone. Import songs files from Files or from your iTunes library (non-DRM tracks only). Play back stems and adjust level, tempo and pitch in realtime. The imported song's stems are always accessible from within Files for easy sharing or import into other audio apps. Supported audio input formats include: WAV, AIF, MP3 and MP4. Stems can be saved in AAC format to save space or uncompressed WAV format for highest quality.
Screenshots
Verdict
The clearest difference is price: Stem Split at Free against Keyboard Collection's $0.99. Keyboard Collection's advantage is rating (4.8 vs 2.6) and in-app purchases (none vs 1). On review sentiment, ratings volume and ads 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
Stem Split is free to download; Keyboard Collection costs $0.99 up front. Stem Split sells 1 one-off in-app purchase. Keyboard Collection asks for nothing beyond the download.
Keyboard Collection holds the better App Store score, 4.8 against 2.6. Both are backed by a comparable volume of ratings — 4 and 5 respectively. Written reviews split almost evenly too, at 100% and 100% positive.
Keyboard Collection ships an update every 4 months, Stem Split every 17 months. The most recent releases landed on October 20, 2026 and October 24, 2026 respectively.
| Parameter | Keyboard Collection | Stem Split |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.8 (4 ratings) — better | 2.6 (5 ratings) |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| Number of ratings | 4 | 5 — better |
| Update frequency | Every 4 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 8.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 61 MB | 179 MB |
| Age rating | 4+ | 4+ |
| Developer | Robert Swinburn | Mellowmuse Ltd |
Customer experience
Keyboard Collection
Stem Split
In-app purchases
Keyboard Collection
No in-app purchases
Stem Split
- Vocal Split$3.99
Questions
Is Keyboard Collection free?
Is Stem Split free?
Which has better reviews, Keyboard Collection or Stem Split?
Do Keyboard Collection or Stem Split have ads?
Which is updated more often, Keyboard Collection or Stem Split?
Other comparisons
