# Oh a Chord vs EffectDeck

The clearest difference is update cadence: EffectDeck at every 2 days against Oh a Chord's fortnightly. EffectDeck also leads on ratings volume (9 vs 2). Oh a Chord's advantage is review sentiment (100% vs 75%) and rating (5.0 vs 4.8). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Oh a Chord holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews point the same way: 100% of Oh a Chord's written reviews are positive against 75% of EffectDeck's.

Oh a Chord ships an update fortnightly, EffectDeck every 2 days. The most recent releases landed on October 7, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Oh a Chord | EffectDeck |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/oh-a-chord/id6804457158/reviews)** | [4.8 (9 ratings)](https://appshunter.io/ios/app/effectdeck/id6812467517/reviews) |
| Number of ratings | 2 | **9** |
| Positive reviews | **100.0% of reviews** | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | Free | Free |
| Size | 1 MB | 18 MB |
| Requires iOS | **16.0** | 27.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NATHAN ROSS MUELLER](https://appshunter.io/developer/6804457160) | [Masahiro Sato](https://appshunter.io/developer/1818044954) |

## What reviewers say

### Oh a Chord

[App page](https://appshunter.io/ios/app/oh-a-chord/id6804457158)

This app generates full chords by pressing a single key, offering various chord types and modifiers. It features a synthesizer engine with adjustable parameters and performance controls for creative musical expression.

**Highlights:** Single-key chord generation, Multiple chord types and modifiers, Key Mode for harmonic context, Strum, Harp, and Arp playback modes, Six-voice polyphonic synthesizer, Adjustable synth parameters, Voicing and performance controls

**Features:** Vision Pro support

**In-app purchases:** none


### EffectDeck

[App page](https://appshunter.io/ios/app/effectdeck/id6812467517)

Process audio from any app with a customizable chain of effects. Add built-in, AUv3, or custom JSFX plugins. Share your audio chains and scripts easily.

**Highlights:** 100+ built-in audio effects, JSFX script support, AUv3 plugin integration, Custom impulse responses, Audio analysis tools, Preset management, Chain and script sharing

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

**In-app purchases:** none


## Frequently asked questions

### Is Oh a Chord free?

Oh a Chord is free to download, with no in-app purchases.

### Is EffectDeck free?

EffectDeck is free to download, with no in-app purchases.

### Which has better reviews, Oh a Chord or EffectDeck?

Oh a Chord is rated higher. Oh a Chord averages 5.0 out of 5 from 2 ratings, while EffectDeck averages 4.8 from 9 ratings.

### Do Oh a Chord or EffectDeck have ads?

Neither Oh a Chord nor EffectDeck shows ads.

### Which is updated more often, Oh a Chord or EffectDeck?

Oh a Chord ships an update fortnightly, and EffectDeck every 2 days. Most recently, Oh a Chord was updated on October 7, 2026 and EffectDeck on October 10, 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.*