Comparison

Thesys vs Stravinski

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

Head to head
About

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.

Highlights
  • MIDI Step Sequencer
  • Pattern Creation
  • Live Performance Options
  • Real-time Pattern Manipulation
  • Integrated Synth
  • Action Section (Gatetime, Looper, Slowdown)
  • Ableton Link Support
Read full description

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

About

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.

Highlights
  • Melody generation
  • Adjustable complexity
  • Tempo and key settings
  • Drum track toggle
  • Audiobus support
  • Inter-App Audio support
  • MIDI out support
Features
Read full description

"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

Stravinski4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Thesys sells 1 one-off in-app purchase. Stravinski asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard8 real differences · 2 level
Thesys versus Stravinski: the parameters behind the verdict, then further details
ParameterThesysStravinski
PriceFreeFree
Rating4.7 (85 ratings) — better4.0 (21 ratings)
Positive reviews59.3% of reviews85.7% of reviews — better
Number of ratings85 — better21
Update frequencyEvery 3 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPadiPhone, iPad, iPod — better
Requires iOS17.610.0 — better
Further details — not scored
Size29 MB136 MB
Age rating4+4+
DeveloperSugar Bytes GmbHPer Loenicker

Customer experience

Thesys

All ratings85 ratings
Positive91.8%
Neutral2.4%
Negative5.9%
Written reviews54 reviews
Positive59.3%
Neutral11.1%
Negative29.6%

Stravinski

All ratings21 ratings
Positive71.4%
Neutral9.5%
Negative19.0%
Written reviews14 reviews
Positive85.7%
Neutral7.1%
Negative7.1%

In-app purchases

1 purchases

Thesys

One-time1
  • Thesys Full Version$19.99
None

Stravinski

No in-app purchases

Questions

Is Thesys free?
Thesys is free to download, with in-app purchases available.
Is Stravinski free?
Stravinski is free to download, with no in-app purchases.
Which has better reviews, Thesys or Stravinski?
Thesys is rated higher. Thesys averages 4.7 out of 5 from 85 ratings, while Stravinski averages 4.0 from 21 ratings.
Do Thesys or Stravinski have ads?
Neither Thesys nor Stravinski shows ads.
Which is updated more often, Thesys or Stravinski?
Thesys ships an update every 3 months, and Stravinski every 5 days. Most recently, Thesys was updated on October 23, 2026 and Stravinski on October 24, 2026.

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