# Radiant Space Fighter vs Stack Master

The clearest difference is in-app purchases: Radiant Space Fighter at none against Stack Master's 9. Stack Master's advantage is update cadence (every 3 days vs every 76 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Stack Master sells 9 one-off in-app purchases. Radiant Space Fighter asks for nothing beyond the download.

Radiant Space Fighter ships an update every 76 months, Stack Master every 3 days. The most recent releases landed on September 18, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | Radiant Space Fighter | Stack Master |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 76 months | **Every 3 days** |
| Size | 71 MB | 54 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aleksa Racovic](https://appshunter.io/developer/1255649501) | [MATTEO MENICAGLIA](https://appshunter.io/developer/1820759470) |

## What reviewers say

### Radiant Space Fighter

[App page](https://appshunter.io/ios/app/radiant-space-fighter/id1257641336)

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack Master

[App page](https://appshunter.io/ios/app/stack-master/id6754972113)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 50 Diamonds | $0.99 | one-time |
| 120 Diamonds - 20% Bonus | $1.99 | one-time |
| 300 Diamonds - Most Popular | $3.99 | one-time |
| First Time Offer | $3.99 | one-time |
| 650 Diamonds | $8.99 | one-time |
| VIP Monthly Pass | $8.99 | one-time |
| 1400 Diamonds | $17.99 | one-time |
| 3000 Diamanti | $34.99 | one-time |
| 7500 Diamonds | $89.99 | one-time |


## Frequently asked questions

### Is Radiant Space Fighter free?

Radiant Space Fighter is free to download, with no in-app purchases.

### Is Stack Master free?

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

### Do Radiant Space Fighter or Stack Master have ads?

Both Radiant Space Fighter and Stack Master show ads.

### Which is updated more often, Radiant Space Fighter or Stack Master?

Radiant Space Fighter ships an update every 76 months, and Stack Master every 3 days. Most recently, Radiant Space Fighter was updated on September 18, 2026 and Stack Master on May 17, 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.*