# Retent vs u4a Хитро

Retent and u4a Хитро are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Retent sells 2 in-app purchases, starting at $6.99 per month and u4a Хитро sells 5 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Retent ships an update every 9 days, u4a Хитро every 11 days. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Retent | u4a Хитро |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 11 days |
| Size | 27 MB | 109 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Kristiyan Grigorov](https://appshunter.io/developer/1885305370) | [MUZIKA DVAISET I EDNO EOOD](https://appshunter.io/developer/6792350372) |

## What reviewers say

### 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 |


### u4a Хитро

[App page](https://appshunter.io/ios/app/u4a/id6792350070)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| u4a Хитро Monthly | $3.99 | per month |
| 6-месечен абонамент | $12.99 | per 6 months |
| Годишен абонамент | $24.99 | per year |
| Доживотен достъп | $34.99 | one-time |
| Lifetime Access | $44.99 | one-time |


## Frequently asked questions

### Is Retent free?

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

### Is u4a Хитро free?

u4a Хитро is free to download, with in-app purchases available.

### Do Retent or u4a Хитро have ads?

Neither Retent nor u4a Хитро shows ads.

### Which is updated more often, Retent or u4a Хитро?

Retent ships an update every 9 days, and u4a Хитро every 11 days. Most recently, Retent was updated on October 31, 2026 and u4a Хитро on October 24, 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.*