# TATIAS vs EIDOUS

The clearest difference is update cadence: EIDOUS at every 4 months against TATIAS's every 8 months. On price, ads, in-app purchases and device support there is nothing between them.

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

TATIAS ships an update every 8 months, EIDOUS every 4 months. The most recent releases landed on October 12, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | TATIAS | EIDOUS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 4 months** |
| Size | 71 MB | 74 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [(주) 타티아스](https://appshunter.io/developer/1553840440) | [Minyoung Corporation](https://appshunter.io/developer/1593124343) |

## What reviewers say

### TATIAS

[App page](https://appshunter.io/ios/app/tatias/id1553840438)

**Features:** Vision Pro support

**In-app purchases:** none


### EIDOUS

[App page](https://appshunter.io/ios/app/eidous/id1593124341)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TATIAS free?

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

### Is EIDOUS free?

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

### Do TATIAS or EIDOUS have ads?

Neither TATIAS nor EIDOUS shows ads.

### Which is updated more often, TATIAS or EIDOUS?

TATIAS ships an update every 8 months, and EIDOUS every 4 months. Most recently, TATIAS was updated on October 12, 2026 and EIDOUS on October 4, 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.*