# SUB ROSA vs Aerien

The clearest difference is iOS requirement: SUB ROSA at 9.0 against Aerien's 12.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

SUB ROSA ships an update every 24 months, Aerien every 38 months. The most recent releases landed on October 3, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | SUB ROSA | Aerien |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 24 months** | Every 38 months |
| Size | 17 MB | 19 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 12+ |
| Developer | [HIROKATSU MATSUSHIMA](https://appshunter.io/developer/1489141711) | [KODAI SEITO](https://appshunter.io/developer/1630907620) |

## What reviewers say

### SUB ROSA

[App page](https://appshunter.io/ios/app/sub-rosa/id1489141712)

**In-app purchases:** none


### Aerien

[App page](https://appshunter.io/ios/app/aerien/id1630907618)

**In-app purchases:** none


## Frequently asked questions

### Is SUB ROSA free?

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

### Is Aerien free?

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

### Do SUB ROSA or Aerien have ads?

Neither SUB ROSA nor Aerien shows ads.

### Which is updated more often, SUB ROSA or Aerien?

SUB ROSA ships an update every 24 months, and Aerien every 38 months. Most recently, SUB ROSA was updated on October 3, 2026 and Aerien 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.*