# Pure  Offline Cycle Note vs Crabwise

The clearest difference is in-app purchases: Pure  Offline Cycle Note at none against Crabwise's 1. Crabwise's advantage is ads (none vs shown) and update cadence (daily vs weekly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Crabwise sells 1 one-off in-app purchase. Pure  Offline Cycle Note asks for nothing beyond the download.

Pure  Offline Cycle Note ships an update weekly, Crabwise daily. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Pure  Offline Cycle Note | Crabwise |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Weekly | **Daily** |
| Size | 21 MB | 6 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [振 杨](https://appshunter.io/developer/6791214227) | [Pouya Marvasti](https://appshunter.io/developer/6797565160) |

## What reviewers say

### Pure  Offline Cycle Note

[App page](https://appshunter.io/ios/app/pure-offline-cycle-note/id6797443798)

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

**In-app purchases:** none


### Crabwise

[App page](https://appshunter.io/ios/app/crabwise-e6b-flight-computer/id6813311167)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Crabwise Pro | $9.99 | one-time |


## Frequently asked questions

### Is Pure  Offline Cycle Note free?

Pure  Offline Cycle Note is free to download, with no in-app purchases.

### Is Crabwise free?

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

### Do Pure  Offline Cycle Note or Crabwise have ads?

Pure  Offline Cycle Note shows ads; Crabwise does not.

### Which is updated more often, Pure  Offline Cycle Note or Crabwise?

Pure  Offline Cycle Note ships an update weekly, and Crabwise daily. Most recently, Pure  Offline Cycle Note was updated on October 7, 2026 and Crabwise on October 1, 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.*