# ThermoSynth vs Solderbox

The clearest difference is price: Solderbox at $12.99 against ThermoSynth's $34.99. Solderbox also leads on review sentiment (90% vs 50%) and ratings volume (27 vs 4). ThermoSynth's advantage is iOS requirement (9.3 vs 13). On rating, update cadence, ads and in-app purchases there is nothing between them.

ThermoSynth costs $34.99 and Solderbox $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for ThermoSynth against 5.0 for Solderbox. That said, the two scores are not equally well evidenced: Solderbox has 27 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 50% of ThermoSynth's written reviews are positive against 90% of Solderbox's.

ThermoSynth ships an update every 2 months, Solderbox every 6 weeks. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | ThermoSynth | Solderbox |
| --- | --- | --- |
| Price | $34.99 | **$12.99** |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/thermosynth/id1619491705/reviews) | [5.0 (27 ratings)](https://appshunter.io/ios/app/solderbox/id6502593345/reviews) |
| Number of ratings | 4 | **27** |
| Positive reviews | 50.0% of reviews | **90.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Paid | Paid |
| Size | 25 MB | 8 MB |
| Requires iOS | **9.3** | 13 |
| Devices | iPad | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [SonicPlanet Audio Video Teknolojileri Anonim Sti.](https://appshunter.io/developer/946568989) | [Bram Bos](https://appshunter.io/developer/325340444) |

## What reviewers say

### ThermoSynth

[App page](https://appshunter.io/ios/app/thermosynth/id1619491705)

This app is a generative synthesizer that creates evolving sonic structures inspired by thermodynamic systems. It features a self-regulating hyper oscillator engine with a feedback matrix and stochastic modulators for unique, never-repeating drone synthesis and organic textures.

**Highlights:** Self-regulating hyper oscillator engine, Generative synthesis at waveform level, 4x4 feedback matrix for oscillator interaction, Stochastic modulators for sonic changes, User-controlled injections for system perturbation, MPE support, High-resolution rotary encoder MIDI mapping

**In-app purchases:** none


### Solderbox

[App page](https://appshunter.io/ios/app/solderbox/id6502593345)

This app is a compact, semi-modular synthesizer designed for generative music creation. It offers a comprehensive set of modular functions, aiming for analog-like sound and behavior with unique digital effects and an 'Instability Engine' for organic fluctuations.

**Highlights:** Generative synthesis tools, Analog-like sound emulation, Instability Engine for organic fluctuations, Audio Unit (AUv3) compatibility, Built-in Pulsequencer melody generator, Multiple filter modes, Stackable patch cables

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ThermoSynth free?

ThermoSynth costs $34.99, with no in-app purchases.

### Is Solderbox free?

Solderbox costs $12.99, with no in-app purchases.

### Which has better reviews, ThermoSynth or Solderbox?

ThermoSynth and Solderbox are both rated 5.0 out of 5 on the App Store, from 4 and 27 ratings respectively.

### Do ThermoSynth or Solderbox have ads?

Neither ThermoSynth nor Solderbox shows ads.

### Which is updated more often, ThermoSynth or Solderbox?

ThermoSynth ships an update every 2 months, and Solderbox every 6 weeks. Most recently, ThermoSynth was updated on October 6, 2026 and Solderbox on October 13, 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.*