# COET vs PiggyNotebook

The clearest difference is in-app purchases: PiggyNotebook at none against COET's 2. PiggyNotebook also leads on update cadence (every 3 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. COET sells 2 in-app purchases, starting at $2.99 per 7 days. PiggyNotebook asks for nothing beyond the download.

COET ships an update every 4 months, PiggyNotebook every 3 days. The most recent releases landed on October 28, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | COET | PiggyNotebook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 days** |
| Size | 77 MB | 22 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Cristian Figueredo](https://appshunter.io/developer/1801335695) | [Yuan Wan](https://appshunter.io/developer/6800536337) |

## What reviewers say

### COET

[App page](https://appshunter.io/ios/app/coet/id6752208314)

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Week no trial | $2.99 | per 7 days |
| $19.99 Yearly 3 days trial | $19.99 | per year |


### PiggyNotebook

[App page](https://appshunter.io/ios/app/piggynotebook/id6800536335)

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

**In-app purchases:** none


## Frequently asked questions

### Is COET free?

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

### Is PiggyNotebook free?

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

### Do COET or PiggyNotebook have ads?

Neither COET nor PiggyNotebook shows ads.

### Which is updated more often, COET or PiggyNotebook?

COET ships an update every 4 months, and PiggyNotebook every 3 days. Most recently, COET was updated on October 28, 2026 and PiggyNotebook on October 20, 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.*