# clientnote客戶筆記 vs Opus

The clearest difference is in-app purchases: clientnote客戶筆記 at none against Opus's 6. Opus's advantage is iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Opus sells 6 in-app purchases, starting at $4.99 per month. clientnote客戶筆記 asks for nothing beyond the download.

## The numbers

| Metric | clientnote客戶筆記 | Opus |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 6 months |
| Size | 2 MB | 57 MB |
| Requires iOS | 18.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [PEI JU WU](https://appshunter.io/developer/1852282289) | [Tugrul Erdem Dogru](https://appshunter.io/developer/1857249299) |

## What reviewers say

### clientnote客戶筆記

[App page](https://appshunter.io/ios/app/clientnote/id6755153910)

**Features:** macOS Compatibility

**In-app purchases:** none


### Opus

[App page](https://appshunter.io/ios/app/opus-pomodoro-focus-timer/id6757388147)

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Collector Edition (Monthly) | $4.99 | per month |
| Collector Edition (Yearly) | $19.99 | per year |
| American Realism | $2.99 | one-time |
| Surrealism | $2.99 | one-time |
| Abstract Art | $2.99 | one-time |
| Opus Pro: Collector Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is clientnote客戶筆記 free?

clientnote客戶筆記 is free to download, with no in-app purchases.

### Is Opus free?

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

### Do clientnote客戶筆記 or Opus have ads?

Neither clientnote客戶筆記 nor Opus 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.*