# ThunderForce vs Sky Guardian

The clearest difference is in-app purchases: Sky Guardian at none against ThunderForce's 1. ThunderForce's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. ThunderForce sells 1 in-app purchase, starting at $0.99 per month. Sky Guardian asks for nothing beyond the download.

ThunderForce ships an update every 5 days, Sky Guardian every 3 days. The most recent releases landed on October 5, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | ThunderForce | Sky Guardian |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | **Every 3 days** |
| Size | 74 MB | 52 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Sun Huang](https://appshunter.io/developer/1819398501) | [EMRE OZEL](https://appshunter.io/developer/6806816615) |

## What reviewers say

### ThunderForce

[App page](https://appshunter.io/ios/app/thunderforce/id6802530155)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ThunderForce Subscription | $0.99 | per month |


### Sky Guardian

[App page](https://appshunter.io/ios/app/sky-guardian-bullet-hell/id6806816613)

**In-app purchases:** none


## Frequently asked questions

### Is ThunderForce free?

ThunderForce is free to download, with in-app purchases available.

### Is Sky Guardian free?

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

### Do ThunderForce or Sky Guardian have ads?

Sky Guardian shows ads; ThunderForce does not.

### Which is updated more often, ThunderForce or Sky Guardian?

ThunderForce ships an update every 5 days, and Sky Guardian every 3 days. Most recently, ThunderForce was updated on October 5, 2026 and Sky Guardian on October 10, 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.*