Thesys vs Stravinski
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Thesys
This app is a powerful and intuitive MIDI step sequencer for creating complex musical patterns. It offers extensive control over MIDI devices, enabling organic bass lines, leads, and pads for studio or live performance. Advanced features allow for real-time pattern manipulation directly from a MIDI keyboard.
- MIDI Step Sequencer
- Pattern Creation
- Live Performance Options
- Real-time Pattern Manipulation
- Integrated Synth
- Action Section (Gatetime, Looper, Slowdown)
- Ableton Link Support
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Thesys is an extremely powerful and intuitive MIDI Step Sequencer app, giving you control over just about all aspects of your favorite MIDI devices. Use Thesys to create varied and organic bass lines, screaming leads, pulsating chords, and organic pad sounds in the studio or on stage. For live musicians, Thesys provides an extremely versatile palette of performance options which can be triggered right from your MIDI keyboard: you can transpose, manipulate, twist up, mutate, and mangle your patterns without even getting near your iPad. No other MIDI sequencer plugin offers you the ease and power of Thesys. It is 100% MIDI compliant and therefore provides the ultimate MIDI sequencing solution. iPad Edition Features: • Integrated Synth • Action Section (Gatetime, Looper, Slowdown...) • Pattern Sequencer • Standalone & Audio Unit v3 • Ableton Link Support • MIDI file Export • MIDI Support (Virtual, Netzwerk, Extern, Bluetooth), MIDI Learn & Host Automation • MIDI Clock Sync (Master & Slave) • Preset iCloud Sync • Preset Share • Zoom
Stravinski
This app generates eight-bar piano melodies based on music psychology research. Users can adjust complexity, tempo, and key, and toggle drum tracks. It supports Audiobus, Inter-App Audio, and MIDI out.
- Melody generation
- Adjustable complexity
- Tempo and key settings
- Drum track toggle
- Audiobus support
- Inter-App Audio support
- MIDI out support
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"Stravinski" is a melody generator that creates eight-bar piano melodies with adjustable complexity. The algorithm is based on scientific research in the field of music psychology. It is developed by the team behind "CHAiOS SYNTH 2". Workflow: set the complexity to your preferred level, press "generate", then "play". That's it. Hit "settings" to set tempo and key, or toggle the drum tracks on/off. Of cause "Stravinski" supports Audiobus, Inter-App Audio and MIDI out. If you want to know more about the theory behind the algorithm get in contact with us. Have fun and get inspired by this premium melody algorithm!
Screenshots
Verdict
The clearest difference is rating: Thesys at 4.7 against Stravinski's 4.0. Thesys also leads on ratings volume (85 vs 21). Stravinski's advantage is in-app purchases (none vs 1) and update cadence (every 5 days vs every 3 months). On price 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
Both are free to download. Thesys sells 1 one-off in-app purchase. Stravinski asks for nothing beyond the download.
Thesys holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 85 and 21 respectively. Written reviews complicate that: 59% of Thesys's written reviews are positive against 86% of Stravinski's, so the app with the better star average is not the one people write more warmly about.
Thesys ships an update every 3 months, Stravinski every 5 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.
| Parameter | Thesys | Stravinski |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (85 ratings) — better | 4.0 (21 ratings) |
| Positive reviews | 59.3% of reviews | 85.7% of reviews — better |
| Number of ratings | 85 — better | 21 |
| Update frequency | Every 3 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.6 | 10.0 — better |
| Further details — not scored | ||
| Size | 29 MB | 136 MB |
| Age rating | 4+ | 4+ |
| Developer | Sugar Bytes GmbH | Per Loenicker |
Customer experience
Thesys
Stravinski
In-app purchases
Thesys
- Thesys Full Version$19.99
Stravinski
No in-app purchases









