# ButterSynth vs TB Lowtone

The clearest difference is price: TB Lowtone at $9.99 against ButterSynth's $19.99. TB Lowtone also leads on rating (4.4 vs 4.0) and review sentiment (85% vs 59%). ButterSynth's advantage is ratings volume (63 vs 14). On update cadence, ads, in-app purchases and monetization model there is nothing between them.

ButterSynth costs $19.99 and TB Lowtone $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TB Lowtone holds the better App Store score, 4.4 against 4.0. Both are backed by a comparable volume of ratings — 63 and 14 respectively. Written reviews point the same way: 59% of ButterSynth's written reviews are positive against 85% of TB Lowtone's.

ButterSynth ships an update every 2 months, TB Lowtone every 3 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ButterSynth | TB Lowtone |
| --- | --- | --- |
| Price | $19.99 | **$9.99** |
| Rating | [4.0 (63 ratings)](https://appshunter.io/ios/app/buttersynth/id1497419006/reviews) | **[4.4 (14 ratings)](https://appshunter.io/ios/app/tb-lowtone/id6448315127/reviews)** |
| Number of ratings | **63** | 14 |
| Positive reviews | 59.2% of reviews | **84.6% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Paid | Paid |
| Size | 468 MB | 13 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Arto Vaarala](https://appshunter.io/developer/890886114) | [ToneBoosters](https://appshunter.io/developer/1472446500) |

## 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


### TB Lowtone

[App page](https://appshunter.io/ios/app/tb-lowtone/id6448315127)

This app is an innovative bass synthesizer and AUv3 plugin that uses loudness-domain harmonic synthesis for deeper, more consistent bass sounds. It features multiple oscillators, modulation options, and built-in effects, plus an AI randomizer for creating new patches.

**Highlights:** Loudness-domain harmonic synthesis, 3 analog-simulated oscillators, Voltage-controlled noise synthesizer, AI randomizer for patch generation, Extended LFOs and ADSR envelope, Pro quality effects (reverb, chorus, delay), AUv3 plugin support

**In-app purchases:** none


## Frequently asked questions

### Is ButterSynth free?

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

### Is TB Lowtone free?

TB Lowtone costs $9.99, with no in-app purchases.

### Which has better reviews, ButterSynth or TB Lowtone?

TB Lowtone is rated higher. ButterSynth averages 4.0 out of 5 from 63 ratings, while TB Lowtone averages 4.4 from 14 ratings.

### Do ButterSynth or TB Lowtone have ads?

Neither ButterSynth nor TB Lowtone shows ads.

### Which is updated more often, ButterSynth or TB Lowtone?

ButterSynth ships an update every 2 months, and TB Lowtone every 3 months. Most recently, ButterSynth was updated on October 29, 2026 and TB Lowtone 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.*