# ButterSynth vs Stand Partner

The clearest difference is price: Stand Partner at Free against ButterSynth's $19.99. Stand Partner also leads on rating (5.0 vs 4.0) and update cadence (every 3 weeks vs every 2 months). ButterSynth's advantage is ratings volume (63 vs 2). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Stand Partner is free to download; ButterSynth costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Stand Partner holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: ButterSynth has 63 ratings behind it against 2, so its average is the more settled of the two.

ButterSynth ships an update every 2 months, Stand Partner every 3 weeks. The most recent releases landed on October 16, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ButterSynth | Stand Partner |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | [4.0 (63 ratings)](https://appshunter.io/ios/app/buttersynth/id1497419006/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/stand-partner/id6809005624/reviews)** |
| Number of ratings | **63** | 2 |
| Positive reviews | 59.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 468 MB | 12 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arto Vaarala](https://appshunter.io/developer/890886114) | [Ian Karoly](https://appshunter.io/developer/6809005626) |

## What reviewers say

### ButterSynth

[App page](https://appshunter.io/ios/app/buttersynth/id1497419006)

This powerful synthesizer app offers a hybrid approach, combining wavetable, FM, and sample-based synthesis. Create unique sounds with a vast sonic range, advanced modulation, and a built-in effects rack. It caters to both experienced sound designers and beginners with extensive presets.

**Highlights:** Hybrid 6-oscillator synthesis (wavetable, FM, sample), Built-in wavetable editor, FM engine with 4 operators, Sample and Granulator engines, 32-slot modulation matrix, Internal FX rack with 16 modules, Extensive preset library

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- ✨ Deep sound design capabilities
- 🎛️ Versatile modulation matrix
- 🔊 Great sound quality
- 💡 Innovative wavetable generator
- 🌟 Serum-like experience

**What reviewers complain about**

- 📱 Fiddly on small screens
- 🐛 Crashes frequently
- 🐛 Disappears in Cubasis
- 🐛 Spikes CPU usage
- 🐛 Crashes on patch change

**Reported bugs**

- App crashing with AUM
- Disappears in Cubasis randomly
- Crashes all the time inside Logic
- Changing a patch spikes CPU to 99%
- Crashes on every patch change

**Requested features**

- MPE popup possible on top of the auv3
- Button to hide built-in keyboard
- Buffer size option
- Additional MIDI mappings (e.g., arpeggiator toggle)
- Sustain pedal support


### Stand Partner

[App page](https://appshunter.io/ios/app/stand-partner/id6809005624)

This music app analyzes your instrumental or vocal performances, displaying pitch, timing, and accuracy note by note. It also functions as a digital music stand for reading, marking up, and playing sheet music.

**Highlights:** Note-by-note performance analysis, Digital music stand, Chromatic tuner, Recording and review, Score annotation and transposition, Metronome with subdivisions, Library for takes and scores

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ButterSynth free?

ButterSynth costs $19.99, with no in-app purchases.

### Is Stand Partner free?

Stand Partner is free to download, with no in-app purchases.

### Which has better reviews, ButterSynth or Stand Partner?

Stand Partner is rated higher. ButterSynth averages 4.0 out of 5 from 63 ratings, while Stand Partner averages 5.0 from 2 ratings.

### Do ButterSynth or Stand Partner have ads?

Neither ButterSynth nor Stand Partner shows ads.

### Which is updated more often, ButterSynth or Stand Partner?

ButterSynth ships an update every 2 months, and Stand Partner every 3 weeks. Most recently, ButterSynth was updated on October 16, 2026 and Stand Partner on October 10, 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.*