# Tonic Synth vs GSi Piano Studio

Tonic Synth and GSi Piano Studio both sit at 5.0 stars, but that hides the real split: 100% of Tonic Synth's written reviews are positive against 33% of GSi Piano Studio's. Tonic Synth also leads on update cadence (every 4 days vs monthly). GSi Piano Studio's advantage is price ($19.99 vs $24.99). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Tonic Synth costs $24.99 and GSi Piano Studio $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 Tonic Synth against 5.0 for GSi Piano Studio. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews are what separate them: 100% of Tonic Synth's written reviews are positive against 33% of GSi Piano Studio's.

Tonic Synth ships an update every 4 days, GSi Piano Studio monthly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Tonic Synth | GSi Piano Studio |
| --- | --- | --- |
| Price | $24.99 | **$19.99** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/tonic-synth/id6783345229/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/gsi-piano-studio/id6796081575/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | **100.0% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Monetization | Paid | Paid |
| Size | 34 MB | 99 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rubens Felicio](https://appshunter.io/developer/6775565794) | [Genuine Soundware](https://appshunter.io/developer/1560880481) |

## What reviewers say

### Tonic Synth

[App page](https://appshunter.io/ios/app/tonic-synth/id6783345229)

A powerful synthesizer app offering three oscillators with diverse sound sources, including physical modeling and wavetables. It features eight analog filter simulations, extensive modulation options, and a full effects rack. Available as a standalone app or AU/AUv3 plugin for Mac and iOS.

**Highlights:** Three oscillators with physical modeling, virtual-analog, wavetable, SF2, and sysex FM, Eight analog filter simulations (LP/HP/BP/Notch, 12/24 dB), Comprehensive modulation: LFO, envelope follower, note-per-note filter envelope, Full effects rack: chorus, delay, reverb, EQ, compressor, flanger, phaser, Standalone app and AU/AUv3 plugin support, Live performance features: editable presets, six scenes, MIDI Learn

**Features:** Vision Pro support

**In-app purchases:** none


### GSi Piano Studio

[App page](https://appshunter.io/ios/app/gsi-piano-studio/id6796081575)

This application uses advanced synthesis to recreate the sound of a grand piano. Users can customize various elements of the piano's mechanics to achieve unique sounds. It requires a physical MIDI keyboard for playback and is best suited for modern devices.

**Highlights:** Physical modeling sound generation, Full polyphony, Virtual sympathetic resonance, Customizable velocity curves, Session Recorder, AUv3 plugin support

**In-app purchases:** none


## Frequently asked questions

### Is Tonic Synth free?

Tonic Synth costs $24.99, with no in-app purchases.

### Is GSi Piano Studio free?

GSi Piano Studio costs $19.99, with no in-app purchases.

### Which has better reviews, Tonic Synth or GSi Piano Studio?

Tonic Synth and GSi Piano Studio are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Tonic Synth or GSi Piano Studio have ads?

Neither Tonic Synth nor GSi Piano Studio shows ads.

### Which is updated more often, Tonic Synth or GSi Piano Studio?

Tonic Synth ships an update every 4 days, and GSi Piano Studio monthly. Most recently, Tonic Synth was updated on October 24, 2026 and GSi Piano Studio 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.*