# Reaction Time vs Sky Stack

The clearest difference is ads: Reaction Time at none against Sky Stack's shown. Reaction Time also leads on device support (5 vs 2). On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Reaction Time sells 1 one-off in-app purchase and Sky Stack sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Reaction Time | Sky Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | — |
| Size | 10 MB | 18 MB |
| Requires iOS | **15.6** | 16.0 |
| Devices | **iPhone, iPad, iPod, Mac, Apple TV** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KidDotCo](https://appshunter.io/developer/819246599) | [Gigabyte LLC](https://appshunter.io/developer/1145126101) |

## What reviewers say

### Reaction Time

[App page](https://appshunter.io/ios/app/reaction-time-tap-zero-zero/id1090740861)

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Can You Find The Cheese? | $1.99 | one-time |


### Sky Stack

[App page](https://appshunter.io/ios/app/sky-stack-tower-block-game/id6760783698)

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 500 coins | $1.99 | one-time |
| Style Pack Celestial | $1.99 | one-time |
| Starter Bundle | $2.99 | one-time |
| Piggy Bank | $2.99 | one-time |
| Remove Ads | $3.99 | one-time |
| 1400 coins | $4.99 | one-time |
| Season Pass | $5.99 | one-time |
| 3500 Coins | $9.99 | one-time |
| 8000 Coins | $19.99 | one-time |
| 25000 Coins | $49.99 | one-time |


## Frequently asked questions

### Is Reaction Time free?

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

### Is Sky Stack free?

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

### Do Reaction Time or Sky Stack have ads?

Sky Stack shows ads; Reaction Time does not.

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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.*