# THETA（シィータ） vs P.S.Gemmie

The clearest difference is iOS requirement: THETA（シィータ） at 8.0 against P.S.Gemmie's 13.0. 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.

THETA（シィータ） ships an update every 42 months, P.S.Gemmie every 40 months. The most recent releases landed on September 10, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | THETA（シィータ） | P.S.Gemmie |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 42 months | **Every 40 months** |
| Size | 3 MB | 4 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Naoya Takahashi](https://appshunter.io/developer/1301211980) | [Cynd Co.,Ltd.](https://appshunter.io/developer/512501162) |

## What reviewers say

### THETA（シィータ）

[App page](https://appshunter.io/ios/app/theta/id1517988653)

**Features:** macOS Compatibility

**In-app purchases:** none


### P.S.Gemmie

[App page](https://appshunter.io/ios/app/psgemmie/id1570768059)

**In-app purchases:** none


## Frequently asked questions

### Is THETA（シィータ） free?

THETA（シィータ） is free to download, with no in-app purchases.

### Is P.S.Gemmie free?

P.S.Gemmie is free to download, with no in-app purchases.

### Do THETA（シィータ） or P.S.Gemmie have ads?

Neither THETA（シィータ） nor P.S.Gemmie shows ads.

### Which is updated more often, THETA（シィータ） or P.S.Gemmie?

THETA（シィータ） ships an update every 42 months, and P.S.Gemmie every 40 months. Most recently, THETA（シィータ） was updated on September 10, 2026 and P.S.Gemmie on September 11, 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.*