# SIDEN vs VivoKey Thermo Reader

The clearest difference is iOS requirement: VivoKey Thermo Reader at 16.6 against SIDEN's 18.0. 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.

## The numbers

| Metric | SIDEN | VivoKey Thermo Reader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 77 MB | 1 MB |
| Requires iOS | 18.0 | **16.6** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [VivoKey Japan LLC](https://appshunter.io/developer/1463916189) | [PETR ZIEGNER](https://appshunter.io/developer/6798405875) |

## What reviewers say

### SIDEN

[App page](https://appshunter.io/ios/app/siden/id6752128234)

**In-app purchases:** none


### VivoKey Thermo Reader

[App page](https://appshunter.io/ios/app/vivokey-thermo-reader/id6798405873)

**In-app purchases:** none


## Frequently asked questions

### Is SIDEN free?

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

### Is VivoKey Thermo Reader free?

VivoKey Thermo Reader is free to download, with no in-app purchases.

### Do SIDEN or VivoKey Thermo Reader have ads?

Neither SIDEN nor VivoKey Thermo Reader shows ads.

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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.*