# Helium AUv3 MIDI Sequencer vs SUBscription Synth

The clearest difference is price: SUBscription Synth at $2.99 against Helium AUv3 MIDI Sequencer's $14.99. SUBscription Synth also leads on update cadence (every 2 days vs fortnightly) and rating (4.6 vs 4.3). On ratings volume, ads, in-app purchases and monetization model there is nothing between them.

Helium AUv3 MIDI Sequencer costs $14.99 and SUBscription Synth $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SUBscription Synth holds the better App Store score, 4.6 against 4.3. Both are backed by a comparable volume of ratings — 55 and 42 respectively. Written reviews point the same way: 75% of Helium AUv3 MIDI Sequencer's written reviews are positive against 88% of SUBscription Synth's.

Helium AUv3 MIDI Sequencer ships an update fortnightly, SUBscription Synth every 2 days. Both last shipped on October 24, 2026.

## The numbers

| Metric | Helium AUv3 MIDI Sequencer | SUBscription Synth |
| --- | --- | --- |
| Price | $14.99 | **$2.99** |
| Rating | [4.3 (55 ratings)](https://appshunter.io/ios/app/helium-auv3-midi-sequencer/id1563152523/reviews) | **[4.6 (42 ratings)](https://appshunter.io/ios/app/subscription-synth/id6450652011/reviews)** |
| Number of ratings | **55** | 42 |
| Positive reviews | 74.5% of reviews | **87.5% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Paid | Paid |
| Size | 84 MB | 8 MB |
| Requires iOS | 13.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [4Pockets.com](https://appshunter.io/developer/370131860) | [Caelum Audio Ltd](https://appshunter.io/developer/1463219587) |

## What reviewers say

### Helium AUv3 MIDI Sequencer

[App page](https://appshunter.io/ios/app/helium-auv3-midi-sequencer/id1563152523)

This app is a powerful MIDI sequencer designed for music production. It allows users to create and arrange complex musical pieces with multiple tracks, extensive clip libraries, and advanced looping features. Easily organize and import MIDI data to build songs efficiently.

**Highlights:** 16 Tracks per instance, Over 7000 MIDI clips library, Media Bay for organizing clips, Remote Looping functionality, Song Mode for arranging sections, Full CC controller editing, Sync to Host

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 👍 Powerful MIDI sequencer
- 💡 Innovative features
- 🚀 Smooth workflow
- 👍 Great value for price
- 💡 Intuitive piano roll

**What reviewers complain about**

- 🐛 Randomization goes extreme
- 🐛 MIDI out channels not visible in AUM
- 🐛 App crashes frequently
- 🐛 Notes get stuck
- 🐛 Randomization causes crashes

**Reported bugs**

- Notes get stuck
- Randomization causes crashes
- MIDI out channels not visible in AUM
- App crashes frequently
- MIDI import mixes tracks

**Requested features**

- Scale key and random velocity
- Arpeggios patterns
- More gradual randomization approach
- Scissor tool for shortening MIDI events
- Latch option for press/hold to audition MIDI sequences


### SUBscription Synth

[App page](https://appshunter.io/ios/app/subscription-synth/id6450652011)

This app transforms user-entered text into unique monophonic sub-synth waveshapes. It offers a text-to-synthesis engine, drive and dirt effects, a low-pass filter, and extensive modulation options for creating powerful bass sounds.

**Highlights:** Text-to-synthesis engine, Monophonic sub-synth, Drive and dirt effects, 12dB/oct low-pass filter, 2 envelopes, 2 LFOs, 4 expression controls, AUv3 plugin and standalone operation

**In-app purchases:** none


## Frequently asked questions

### Is Helium AUv3 MIDI Sequencer free?

Helium AUv3 MIDI Sequencer costs $14.99, with no in-app purchases.

### Is SUBscription Synth free?

SUBscription Synth costs $2.99, with no in-app purchases.

### Which has better reviews, Helium AUv3 MIDI Sequencer or SUBscription Synth?

SUBscription Synth is rated higher. Helium AUv3 MIDI Sequencer averages 4.3 out of 5 from 55 ratings, while SUBscription Synth averages 4.6 from 42 ratings.

### Do Helium AUv3 MIDI Sequencer or SUBscription Synth have ads?

Neither Helium AUv3 MIDI Sequencer nor SUBscription Synth shows ads.

### Which is updated more often, Helium AUv3 MIDI Sequencer or SUBscription Synth?

Helium AUv3 MIDI Sequencer ships an update fortnightly, and SUBscription Synth every 2 days. Most recently, Helium AUv3 MIDI Sequencer was updated on October 24, 2026 and SUBscription Synth on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*