# Key Lens vs Common Charts

The clearest difference is update cadence: Common Charts at every 9 days against Key Lens's every 6 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Key Lens sells 1 one-off in-app purchase and Common Charts sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Key Lens ships an update every 6 weeks, Common Charts every 9 days. The most recent releases landed on November 13, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Key Lens | Common Charts |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Size | 58 MB | 45 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Alex Amayo](https://appshunter.io/developer/1835625743) | [Tim Morgan](https://appshunter.io/developer/1631753073) |

## What reviewers say

### Key Lens

[App page](https://appshunter.io/ios/app/key-lens/id6761850903)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Midi Output | $9.99 | one-time |


### Common Charts

[App page](https://appshunter.io/ios/app/common-charts/id6768880611)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Common Charts Plus Monthly | $9.99 | per month |
| Common Charts Plus Yearly | $99.99 | per year |


## Frequently asked questions

### Is Key Lens free?

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

### Is Common Charts free?

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

### Do Key Lens or Common Charts have ads?

Neither Key Lens nor Common Charts shows ads.

### Which is updated more often, Key Lens or Common Charts?

Key Lens ships an update every 6 weeks, and Common Charts every 9 days. Most recently, Key Lens was updated on November 13, 2026 and Common Charts on November 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.*