# Protege vs Echo Shelf.

The clearest difference is in-app purchases: Echo Shelf. at none against Protege's 1. Echo Shelf. also leads on iOS requirement (13.0 vs 15.1). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Protege sells 1 in-app purchase, starting at $3.99 per month. Echo Shelf. asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Protege | Echo Shelf. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 214 MB | 22 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yoseph Kassaye](https://appshunter.io/developer/603388887) | [My Vision Match LLC](https://appshunter.io/developer/1802686748) |

## What reviewers say

### Protege

[App page](https://appshunter.io/ios/app/protege-teach-your-student/id6747300537)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Protege Subscription | $3.99 | per month |


### Echo Shelf.

[App page](https://appshunter.io/ios/app/echo-shelf/id6755823127)

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

**In-app purchases:** none


## Frequently asked questions

### Is Protege free?

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

### Is Echo Shelf. free?

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

### Do Protege or Echo Shelf. have ads?

Neither Protege nor Echo Shelf. shows ads.

### Which is updated more often, Protege or Echo Shelf.?

Protege ships an update every 3 weeks, and Echo Shelf. every 3 weeks. Most recently, Protege was updated on October 30, 2026 and Echo Shelf. on October 31, 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.*