# Let's Stack! vs Save Rainbow

The clearest difference is in-app purchases: Save Rainbow at none against Let's Stack!'s 1. Save Rainbow also leads on update cadence (every 3 days vs every 3 months) and iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Let's Stack! sells 1 one-off in-app purchase. Save Rainbow asks for nothing beyond the download.

Let's Stack! ships an update every 3 months, Save Rainbow every 3 days. The most recent releases landed on September 28, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | Let's Stack! | Save Rainbow |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (9 ratings)](https://appshunter.io/ios/app/lets-stack/id1239142077/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 96.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 days** |
| Monetization | Free with in-app purchases | — |
| Size | 24 MB | 82 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Hendri Soerianto](https://appshunter.io/developer/1107831294) | [Khalid Jarhder](https://appshunter.io/developer/1512072470) |

## What reviewers say

### Let's Stack!

[App page](https://appshunter.io/ios/app/lets-stack/id1239142077)

Guide a duck to build the tallest tower of blocks by tapping and timing. Compete globally on leaderboards to achieve the highest score. This addictive game is suitable for the whole family.

**Highlights:** Build block towers, Tapping and timing gameplay, Global leaderboards, Addictive fun, Family-friendly

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ad Banners | $0.99 | one-time |


### Save Rainbow

[App page](https://appshunter.io/ios/app/save-rainbow-monster-rescue/id1661583173)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Let's Stack! free?

Let's Stack! is free to download, with in-app purchases available.

### Is Save Rainbow free?

Save Rainbow is free to download, with no in-app purchases.

### Do Let's Stack! or Save Rainbow have ads?

Both Let's Stack! and Save Rainbow show ads.

### Which is updated more often, Let's Stack! or Save Rainbow?

Let's Stack! ships an update every 3 months, and Save Rainbow every 3 days. Most recently, Let's Stack! was updated on September 28, 2026 and Save Rainbow on September 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.*