# Stellar! vs Reaction Speed Check

The clearest difference is in-app purchases: Reaction Speed Check at none against Stellar!'s 6. Reaction Speed Check also leads on ads (none vs shown). Stellar!'s advantage is update cadence (every 2 months vs every 6 months) and iOS requirement (13.0 vs 17.0). On price and device support there is nothing between them.

Both are free to download. Stellar! sells 6 one-off in-app purchases. Reaction Speed Check asks for nothing beyond the download.

Stellar! ships an update every 2 months, Reaction Speed Check every 6 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | Stellar! | Reaction Speed Check |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.2 (5 ratings)](https://appshunter.io/ios/app/stellar-infinity-defense/id1379005158/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 104 MB | 65 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 9+ | 9+ |
| Developer | [SeHyeon Im](https://appshunter.io/developer/1294084939) | [xita apps](https://appshunter.io/developer/1461041968) |

## What reviewers say

### Stellar!

[App page](https://appshunter.io/ios/app/stellar-infinity-defense/id1379005158)

Defend the last planet with life from alien robots by controlling a spaceship and strategically placing towers. Loot spaceships and towers, upgrade abilities, and combine cards to build your unique defense strategy. Compete globally on the ranking system.

**Highlights:** Control spaceship to defend base, Select tactical upgrades, Loot spaceships and towers, Unique tower abilities, Combine spaceship and tower cards, Global ranking system

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 20 GEMS | $0.99 | one-time |
| 110 GEMS | $4.99 | one-time |
| 240 GEMS | $9.99 | one-time |
| 550 GEMS | $19.99 | one-time |
| 1500 GEMS | $49.99 | one-time |
| 3200 GEMS | $99.99 | one-time |


### Reaction Speed Check

[App page](https://appshunter.io/ios/app/reaction-speed-check/id6754903479)

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

**In-app purchases:** none


## Frequently asked questions

### Is Stellar! free?

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

### Is Reaction Speed Check free?

Reaction Speed Check is free to download, with no in-app purchases.

### Do Stellar! or Reaction Speed Check have ads?

Stellar! shows ads; Reaction Speed Check does not.

### Which is updated more often, Stellar! or Reaction Speed Check?

Stellar! ships an update every 2 months, and Reaction Speed Check every 6 months. Most recently, Stellar! was updated on November 6, 2026 and Reaction Speed Check on November 6, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*