# 赤おに vs Aerien

赤おに and Aerien 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. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 38 months. The most recent releases landed on October 25, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | 赤おに | Aerien |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | Every 38 months |
| Size | 46 MB | 19 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 12+ | 12+ |
| Developer | [AKAONI HOLDINGS, K.K.](https://appshunter.io/developer/1587631034) | [KODAI SEITO](https://appshunter.io/developer/1630907620) |

## What reviewers say

### 赤おに

[App page](https://appshunter.io/ios/app/id1587631032)

**In-app purchases:** none


### Aerien

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

**In-app purchases:** none


## Frequently asked questions

### Is 赤おに free?

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

### Is Aerien free?

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

### Do 赤おに or Aerien have ads?

Neither 赤おに nor Aerien shows ads.

### Which is updated more often, 赤おに or Aerien?

赤おに ships an update every 38 months, and Aerien every 38 months. Most recently, 赤おに was updated on October 25, 2026 and Aerien on October 27, 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.*