# Etchd.ai vs Rew

The clearest difference is iOS requirement: Etchd.ai at 15.1 against Rew's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Etchd.ai sells 3 in-app purchases, starting at $4.99 per 7 days and Rew sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Etchd.ai ships an update every 4 days, Rew every 3 days. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Etchd.ai | Rew |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 4 days | **Every 3 days** |
| Size | 47 MB | 16 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Huseyin Alper Teoman](https://appshunter.io/developer/1719615836) | [Ernst Danielle Legaspi](https://appshunter.io/developer/6794576535) |

## What reviewers say

### Etchd.ai

[App page](https://appshunter.io/ios/app/etchdai-ai-study-tools/id6759305019)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Etchd Pro | $4.99 | per 7 days |
| Etchd Pro | $9.99 | per month |
| Etchd Premium | $19.99 | per month |


### Rew

[App page](https://appshunter.io/ios/app/rew-ai-study-companion/id6794576533)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7 Topic Credits | $0.99 | one-time |


## Frequently asked questions

### Is Etchd.ai free?

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

### Is Rew free?

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

### Do Etchd.ai or Rew have ads?

Both Etchd.ai and Rew show ads.

### Which is updated more often, Etchd.ai or Rew?

Etchd.ai ships an update every 4 days, and Rew every 3 days. Most recently, Etchd.ai was updated on October 7, 2026 and Rew 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.*