Midiflow Randomizer (Audiobus) vs Stellr
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Midiflow Randomizer (Audiobus)
This MIDI effect app generates random variations in notes, velocities, and timing for musical sequences. It allows users to specify the range of randomization and can be used with other MIDI tools for harmonious results. Requires Audiobus 3.
- Randomize notes
- Randomize note velocities
- Randomize timing
- Specify variation range
- Use multiple instances
- Requires Audiobus 3
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Whether you want to add a human touch to note sequences or seek inspiration, this MIDI effect app for Audiobus 3 is a simple but effective tool for you. Randomize notes, note velocities, and timing just by specifying a desired range of variations. With the help of Midiflow Scales, you can keep your randomized notes in harmony. + Randomize notes + Randomize note velocities + Randomize timing + Specify an amount of variation for each type + Use multiple instances of this effect in Audiobus NOTE: This app requires Audiobus 3. Insert it into one or more MIDI effect ports to affect the data going through the respective pipelines.
Stellr
Create deep, ethereal ambiance with a pitch-shifter, dual delays, and reverb. Explore sonic possibilities with 15 presets, randomization, and parameter automation. Enhance your music with a new dimension of sound.
- Pitch shifter with fine-tuning or semitone snap
- Two independent delays for complex feedback
- LFO modulation and various reverb types
- Pre-gain and dry/wet level control
- Audio Unit Extension, Audiobus, Inter-App Audio support
- 15 built-in presets with import/export
- Realtime frequency spectrum visualizer
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Stellr is a pitch-shifter/delay/reverb sound processor aimed to recreate the classic shimmer effect. It makes deep ethereal ambiance on top of your sound, providing you with a wide variety of sonic possibilities. Add a new dimension to your music. The effect features 20 ready to use presets which can be shared between devices as well as randomize button for endless variations. When loaded as Audio Unit effect, all parameters can be automated via host app. Stellr main features: – Pitch shifter which can be fine-tuned or snapped to semitone – Two separate delays for creating a complex feedback effect – LFO modulation and different types of reverb – Set pre-gain and dry/wet levels – Audio Unit Extension support – 20 built-in presets – Low-pass and High-pass filters – Ability to save and randomize parameters – Import and export of user presets – Realtime frequency spectrum visualizer
Screenshots
Verdict
The clearest difference is rating: Stellr at 3.4 against Midiflow Randomizer (Audiobus)'s 3.0. Stellr also leads on review sentiment (67% vs 50%). Midiflow Randomizer (Audiobus)'s advantage is update cadence (every 11 months vs every 40 months) and price ($1.99 vs $4.99). On ratings volume, ads, in-app purchases and monetization model 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
Midiflow Randomizer (Audiobus) costs $1.99 and Stellr $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Stellr holds the better App Store score, 3.4 against 3.0. Both are backed by a comparable volume of ratings — 4 and 9 respectively. Written reviews point the same way: 50% of Midiflow Randomizer (Audiobus)'s written reviews are positive against 67% of Stellr's.
Midiflow Randomizer (Audiobus) ships an update every 11 months, Stellr every 40 months. The most recent releases landed on October 24, 2026 and October 19, 2026 respectively.
| Parameter | Midiflow Randomizer (Audiobus) | Stellr |
|---|---|---|
| Price | $1.99 — better | $4.99 |
| Rating | 3.0 (4 ratings) | 3.4 (9 ratings) — better |
| Positive reviews | 50.0% of reviews | 66.7% of reviews — better |
| Number of ratings | 4 | 9 — better |
| Update frequency | Every 11 months — better | Every 40 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.2 — better | 12.0 |
| Further details — not scored | ||
| Size | 5 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Johannes Doerr | BACKPULLVER SOFTWARE LTD OOD |
Customer experience
Midiflow Randomizer (Audiobus)
Stellr
In-app purchases
Midiflow Randomizer (Audiobus)
No in-app purchases
Stellr
No in-app purchases
Questions
Is Midiflow Randomizer (Audiobus) free?
Is Stellr free?
Which has better reviews, Midiflow Randomizer (Audiobus) or Stellr?
Do Midiflow Randomizer (Audiobus) or Stellr have ads?
Which is updated more often, Midiflow Randomizer (Audiobus) or Stellr?
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