# ChordTrans vs GSDSP Quantum Delay

The clearest difference is price: ChordTrans at $1.99 against GSDSP Quantum Delay's $14.99. ChordTrans also leads on update cadence (fortnightly vs every 5 weeks) and iOS requirement (9.0 vs 12.0). GSDSP Quantum Delay's advantage is rating (4.8 vs 4.3) and ratings volume (17 vs 4). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

ChordTrans costs $1.99 and GSDSP Quantum Delay $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.

GSDSP Quantum Delay holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 4 and 17 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

ChordTrans ships an update fortnightly, GSDSP Quantum Delay every 5 weeks. Both last shipped on October 9, 2026.

## The numbers

| Metric | ChordTrans | GSDSP Quantum Delay |
| --- | --- | --- |
| Price | **$1.99** | $14.99 |
| Rating | [4.3 (4 ratings)](https://appshunter.io/ios/app/chordtrans/id1250174242/reviews) | **[4.8 (17 ratings)](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297/reviews)** |
| Number of ratings | 4 | **17** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 weeks |
| Monetization | Paid | Paid |
| Size | 17 MB | 94 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kamran Saberihaghighi](https://appshunter.io/developer/659751337) | [Gustav Scholda](https://appshunter.io/developer/1642323227) |

## What reviewers say

### ChordTrans

[App page](https://appshunter.io/ios/app/chordtrans/id1250174242)

Easily transpose chords and simplify difficult ones for guitar and E-piano players. This app offers tools to change song keys with or without a capo and find compatible keys for your music.

**Highlights:** Chord transposition, Simplify difficult chords, Capo simulation, Song key transposition, Key finder, E-piano transpose examples

**Features:** macOS Compatibility

**In-app purchases:** none


### GSDSP Quantum Delay

[App page](https://appshunter.io/ios/app/gsdsp-quantum-delay/id6469328297)

This app offers a vintage-inspired stereo delay effect with advanced modulation, flexible filtering, and precise timing controls. It allows users to sculpt unique echo textures, from warm analog sounds to complex, evolving soundscapes.

**Highlights:** Vintage-inspired stereo delay, Deep modulation system, Flexible filtering (LPF, HPF, BPF), Precise timing controls (BPM, ms), Switchable stereo/dual mono modes, Advanced modulation sources (LFO, Random, Envelope)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ChordTrans free?

ChordTrans costs $1.99, with no in-app purchases.

### Is GSDSP Quantum Delay free?

GSDSP Quantum Delay costs $14.99, with no in-app purchases.

### Which has better reviews, ChordTrans or GSDSP Quantum Delay?

GSDSP Quantum Delay is rated higher. ChordTrans averages 4.3 out of 5 from 4 ratings, while GSDSP Quantum Delay averages 4.8 from 17 ratings.

### Do ChordTrans or GSDSP Quantum Delay have ads?

Neither ChordTrans nor GSDSP Quantum Delay shows ads.

### Which is updated more often, ChordTrans or GSDSP Quantum Delay?

ChordTrans ships an update fortnightly, and GSDSP Quantum Delay every 5 weeks. Most recently, ChordTrans was updated on October 9, 2026 and GSDSP Quantum Delay on October 9, 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.*