# Aerodrums 2 vs SUS4 Chord ID

The clearest difference is rating: Aerodrums 2 at 4.1 against SUS4 Chord ID's 1.0. Aerodrums 2 also leads on in-app purchases (none vs 1) and ratings volume (9 vs 1). SUS4 Chord ID's advantage is update cadence (fortnightly vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. SUS4 Chord ID sells 1 in-app purchase, starting at $2.99 per month. Aerodrums 2 asks for nothing beyond the download.

Aerodrums 2 holds the better App Store score, 4.1 against 1.0. That said, the two scores are not equally well evidenced: Aerodrums 2 has 9 ratings behind it against 1, so its average is the more settled of the two.

Aerodrums 2 ships an update every 2 months, SUS4 Chord ID fortnightly. The most recent releases landed on October 24, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Aerodrums 2 | SUS4 Chord ID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (9 ratings)](https://appshunter.io/ios/app/aerodrums-2/id6705133603/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/sus4-chord-id/id6777229621/reviews) |
| Number of ratings | **9** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Fortnightly** |
| Monetization | **Free** | Freemium |
| Size | 146 MB | 21 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 9+ | 4+ |
| Developer | [Aerodrums](https://appshunter.io/developer/1415055398) | [ThePaulSmith](https://appshunter.io/developer/319584506) |

## What reviewers say

### Aerodrums 2

[App page](https://appshunter.io/ios/app/aerodrums-2/id6705133603)

This app connects to a unique air drumming instrument, allowing users to visualize their drum kit in 3D. It offers features for configuring the instrument, selecting drum sets, playing along to songs, and recording performances.

**Highlights:** Connect to Aerodrums 2 device, Visualize drum kit in 3D, Configure instrument settings, Select drum sets, Play along to songs, Record performances, Create MIDI maps

**Features:** macOS Compatibility

**In-app purchases:** none


### SUS4 Chord ID

[App page](https://appshunter.io/ios/app/sus4-chord-id/id6777229621)

Identify any chord you hear or play. This app listens to music or uses its built-in keyboard to name chords, displaying common guitar and piano voicings. It supports everything from simple triads to complex jazz chords and logs your identified chords with notes.

**Highlights:** Microphone-based chord detection, Built-in keyboard for manual input, Chord name display with voicings, Supports complex jazz chords, Identification history with notes, On-device audio analysis

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SUS4 Chord ID Pro Monthly | $2.99 | per month |


## Frequently asked questions

### Is Aerodrums 2 free?

Aerodrums 2 is free to download, with no in-app purchases.

### Is SUS4 Chord ID free?

SUS4 Chord ID is free to download, with in-app purchases available.

### Which has better reviews, Aerodrums 2 or SUS4 Chord ID?

Aerodrums 2 is rated higher. Aerodrums 2 averages 4.1 out of 5 from 9 ratings, while SUS4 Chord ID averages 1.0 from 1 ratings.

### Do Aerodrums 2 or SUS4 Chord ID have ads?

Neither Aerodrums 2 nor SUS4 Chord ID shows ads.

### Which is updated more often, Aerodrums 2 or SUS4 Chord ID?

Aerodrums 2 ships an update every 2 months, and SUS4 Chord ID fortnightly. Most recently, Aerodrums 2 was updated on October 24, 2026 and SUS4 Chord ID on October 12, 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.*