# IZZI vs Retent

The clearest difference is in-app purchases: IZZI at none against Retent's 2. IZZI also leads on iOS requirement (13.0 vs 15.0). Retent's advantage is update cadence (every 10 days vs every 15 months). On price, ads and device support there is nothing between them.

Both are free to download. Retent sells 2 in-app purchases, starting at $6.99 per month. IZZI asks for nothing beyond the download.

IZZI ships an update every 15 months, Retent every 10 days. The most recent releases landed on October 15, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | IZZI | Retent |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 15 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 39 MB | 27 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Klett Bulgaria Ltd](https://appshunter.io/developer/1121264773) | [Kristiyan Grigorov](https://appshunter.io/developer/1885305370) |

## What reviewers say

### IZZI

[App page](https://appshunter.io/ios/app/izzi/id1543264241)

This educational platform offers a vast library of digital learning resources, including interactive tasks, games, and simulations. It provides a modern approach to teaching and allows offline access to downloaded content, with progress syncing across devices when online.

**Highlights:** Extensive digital educational content, Interactive tasks, games, and simulations, Offline content access, Progress synchronization across devices, Modern teaching approach

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

**In-app purchases:** none


### Retent

[App page](https://appshunter.io/ios/app/retent-learn-and-remember/id6760609613)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Retent Unlimited Monthly | $6.99 | per month |
| Retent Unlimited Yearly | $39.99 | per year |


## Frequently asked questions

### Is IZZI free?

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

### Is Retent free?

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

### Do IZZI or Retent have ads?

Neither IZZI nor Retent shows ads.

### Which is updated more often, IZZI or Retent?

IZZI ships an update every 15 months, and Retent every 10 days. Most recently, IZZI was updated on October 15, 2026 and Retent on October 14, 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.*