# Stark Auth vs Sky Thunder

The clearest difference is update cadence: Sky Thunder at monthly against Stark Auth's every 3 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.

Stark Auth ships an update every 3 months, Sky Thunder monthly. The most recent releases landed on September 10, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Stark Auth | Sky Thunder |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Size | 58 MB | 105 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Stark Bank S.A.](https://appshunter.io/developer/1620050036) | [Stalo Servicos de Tecnologia LTDA](https://appshunter.io/developer/1714641198) |

## What reviewers say

### Stark Auth

[App page](https://appshunter.io/ios/app/stark-auth/id6480134848)

**Features:** macOS Compatibility

**In-app purchases:** none


### Sky Thunder

[App page](https://appshunter.io/ios/app/sky-thunder-gestao/id6757832598)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Stark Auth free?

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

### Is Sky Thunder free?

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

### Do Stark Auth or Sky Thunder have ads?

Neither Stark Auth nor Sky Thunder shows ads.

### Which is updated more often, Stark Auth or Sky Thunder?

Stark Auth ships an update every 3 months, and Sky Thunder monthly. Most recently, Stark Auth was updated on September 10, 2026 and Sky Thunder on September 22, 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.*