# GSi Piano Studio vs RX

The clearest difference is price: RX at $9.99 against GSi Piano Studio's $19.99. RX also leads on update cadence (weekly vs monthly). GSi Piano Studio's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

GSi Piano Studio costs $19.99 and RX $9.99 up front. RX sells 1 one-off in-app purchase. GSi Piano Studio asks for nothing beyond the download.

GSi Piano Studio ships an update monthly, RX weekly. The most recent releases landed on October 24, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | GSi Piano Studio | RX |
| --- | --- | --- |
| Price | $19.99 | **$9.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/gsi-piano-studio/id6796081575/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Weekly** |
| Monetization | Paid | — |
| Size | 99 MB | 25 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Genuine Soundware](https://appshunter.io/developer/1560880481) | [sung ju KIM](https://appshunter.io/developer/6781333993) |

## What reviewers say

### 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


### RX

[App page](https://appshunter.io/ios/app/rx-79/id6821795679)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SJ PACK | $5.99 | one-time |


## Frequently asked questions

### Is GSi Piano Studio free?

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

### Is RX free?

RX costs $9.99, and also offers in-app purchases.

### Do GSi Piano Studio or RX have ads?

Neither GSi Piano Studio nor RX shows ads.

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

GSi Piano Studio ships an update monthly, and RX weekly. Most recently, GSi Piano Studio was updated on October 24, 2026 and RX on October 29, 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.*