# GuitarChordFlow vs Knob16

The clearest difference is price: Knob16 at Free against GuitarChordFlow's $0.99. GuitarChordFlow's advantage is in-app purchases (none vs 1) and iOS requirement (15.0 vs 18.6). On ads and device support there is nothing between them.

Knob16 is free to download; GuitarChordFlow costs $0.99 up front. Knob16 sells 1 one-off in-app purchase. GuitarChordFlow asks for nothing beyond the download.

## The numbers

| Metric | GuitarChordFlow | Knob16 |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 8 days |
| Size | 3 MB | 12 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [晓飞 沈](https://appshunter.io/developer/1888039228) | [JURIJS KOSKINS](https://appshunter.io/developer/1888330126) |

## What reviewers say

### GuitarChordFlow

[App page](https://appshunter.io/ios/app/guitarchordflow-practice/id6761188980)

**Features:** macOS Compatibility

**In-app purchases:** none


### Knob16

[App page](https://appshunter.io/ios/app/knob16/id6761230712)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Knob16 Pro | $11.99 | one-time |


## Frequently asked questions

### Is GuitarChordFlow free?

GuitarChordFlow costs $0.99, with no in-app purchases.

### Is Knob16 free?

Knob16 is free to download, with in-app purchases available.

### Do GuitarChordFlow or Knob16 have ads?

Neither GuitarChordFlow nor Knob16 shows ads.

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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.*