TriKey vs GS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
TriKey
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TriKey is a composer's keyboard Control other iPad synths or external MIDI hardware! Features: - 3 configurable Keyboards with the ability to control CC Messages by moving your fingers up / down - Global Key and Scales prevent you from ever playing a wrong note - Save and toggle Chords - Advanced CC Options for each keyboard - Save / Load your own presets - Individual MIDI Ports & Channels for each Keyboard
GS
This audio plugin emulates the classic Space Echo tape delay effect for iOS devices. It aims to replicate the authentic sound and quirks of the original hardware, offering a vintage delay experience.
- AUv3 plugin for iOS
- Emulates Space Echo tape delay
- Authentic vintage sound
- Basic controls mirroring original hardware
- iPad platform compatibility
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Please note: this is an AUv3 plugin that can be used with compatible host Apps. GS-201 Mark II is the evolution of a project that began in 2007 with the release of the old version of GS-201, which evolved into a mark II version in 2019 and has now landed on the iPad platform. The aim is to capture the magic of the famous Space Echo tape delay and make it available to everyone. It's not an easy task, but the experience gained over the past 15 years in audio DSP development has helped us achieve a result that can sometimes fool even ourselves. This iOS version of the GS-201 Mark II contains only the basic controls found on the original Space Echo, with no additional editing parameters. If you want to eliminate tape hiss, if the tape splice glitch is bothering you, if you don't like wow and flutter, or need host tempo sync, you are definitely looking for a different plug-in. If, on the other hand, you want to relive the experience of dealing with an original Space Echo, with all its pros and cons, you are in the right place.
Screenshots
Verdict
The clearest difference is update cadence: TriKey at every 2 months against GS's every 17 months. TriKey also leads on price ($9.99 vs $11.99). GS's advantage is device support (3 vs 1). On ads, in-app purchases and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
TriKey costs $9.99 and GS $11.99 up front. Neither carries in-app purchases, so what you see is what you pay.
TriKey ships an update every 2 months, GS every 17 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.
| Parameter | TriKey | GS |
|---|---|---|
| Price | $9.99 — better | $11.99 |
| Rating | — | 4.5 (11 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 11 — better |
| Update frequency | Every 2 months — better | Every 17 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcos Kohler | Genuine Soundware |
In-app purchases
TriKey
No in-app purchases
GS
No in-app purchases









