# MuPlevenEmis vs Retent

The clearest difference is in-app purchases: MuPlevenEmis at none against Retent's 2. MuPlevenEmis also leads on iOS requirement (12.2 vs 15.0). Retent's advantage is update cadence (every 8 days vs every 5 weeks). 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. MuPlevenEmis asks for nothing beyond the download.

MuPlevenEmis ships an update every 5 weeks, Retent every 8 days. The most recent releases landed on November 8, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | MuPlevenEmis | Retent |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 8 days** |
| Size | 312 MB | 27 MB |
| Requires iOS | **12.2** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [MEDICAL UNIVERSITY](https://appshunter.io/developer/1833920192) | [Kristiyan Grigorov](https://appshunter.io/developer/1885305370) |

## What reviewers say

### MuPlevenEmis

[App page](https://appshunter.io/ios/app/muplevenemis/id6743317128)

**Features:** macOS Compatibility

**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 MuPlevenEmis free?

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

### Is Retent free?

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

### Do MuPlevenEmis or Retent have ads?

Neither MuPlevenEmis nor Retent shows ads.

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

MuPlevenEmis ships an update every 5 weeks, and Retent every 8 days. Most recently, MuPlevenEmis was updated on November 8, 2026 and Retent on November 5, 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.*