# ThermoSynth vs Lines

ThermoSynth and Lines both sit at 5.0 stars, but that hides the real split: 100% of Lines's written reviews are positive against 50% of ThermoSynth's. Lines also leads on price ($19.99 vs $34.99) and device support (3 vs 1). ThermoSynth's advantage is update cadence (every 2 months vs every 13 months) and iOS requirement (9.3 vs 12.0). On rating, ratings volume, ads and in-app purchases there is nothing between them.

ThermoSynth costs $34.99 and Lines $19.99 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 Lines. Both are backed by a comparable volume of ratings — 4 and 11 respectively. Written reviews are what separate them: 50% of ThermoSynth's written reviews are positive against 100% of Lines's.

ThermoSynth ships an update every 2 months, Lines every 13 months. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | ThermoSynth | Lines |
| --- | --- | --- |
| Price | $34.99 | **$19.99** |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/thermosynth/id1619491705/reviews) | [5.0 (11 ratings)](https://appshunter.io/ios/app/lines-feedback-multieffect/id6461267498/reviews) |
| Number of ratings | 4 | **11** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 13 months |
| Monetization | Paid | Paid |
| Size | 25 MB | 29 MB |
| Requires iOS | **9.3** | 12.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SonicPlanet Audio Video Teknolojileri Anonim Sti.](https://appshunter.io/developer/946568989) | [AudioThing Ltd.](https://appshunter.io/developer/1659941236) |

## 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


### Lines

[App page](https://appshunter.io/ios/app/lines-feedback-multieffect/id6461267498)

This audio effect plugin transforms any signal into a wide spectrum of sounds, from lo-fi to distortion and feedback. It can also function as an experimental synthesizer, creating rhythms and soundscapes even without input.

**Highlights:** Creative signal mangling, Experimental synthesizer, Feedback-based sound design, Wide range of audio effects, Rhythm and soundscape generation

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ThermoSynth free?

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

### Is Lines free?

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

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

ThermoSynth and Lines are both rated 5.0 out of 5 on the App Store, from 4 and 11 ratings respectively.

### Do ThermoSynth or Lines have ads?

Neither ThermoSynth nor Lines shows ads.

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

ThermoSynth ships an update every 2 months, and Lines every 13 months. Most recently, ThermoSynth was updated on October 6, 2026 and Lines on October 15, 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.*