# RainbowSifter vs Number Blocks 16

The clearest difference is price: RainbowSifter at Free against Number Blocks 16's $0.49. Number Blocks 16's advantage is device support and iOS requirement (15.6 vs 18.6). On in-app purchases there is nothing between them.

RainbowSifter is free to download; Number Blocks 16 costs $0.49 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | RainbowSifter | Number Blocks 16 |
| --- | --- | --- |
| Price | **Free** | $0.49 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rainbowsifter/id1616453352/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | — | Every 7 months |
| Monetization | Free | — |
| Size | 8 MB | 25 MB |
| Requires iOS | 18.6 | **15.6** |
| Devices | — | **iPhone, iPad, iPod, Apple TV** |
| Age rating | 4+ | 4+ |
| Developer | [Robert Hennessy](https://appshunter.io/developer/381643143) | [Murat Saygin](https://appshunter.io/developer/1835723040) |

## What reviewers say

### RainbowSifter

[App page](https://appshunter.io/ios/app/rainbowsifter/id1616453352)

A color-matching puzzle game where players select six primary rainbow colors from an expanding selection. Drag colors to a target to build your rainbow. Long-press the target for additional options.

**Highlights:** Color selection, Rainbow building, Drag and drop interface, Long press options, Increasing difficulty

**In-app purchases:** none


### Number Blocks 16

[App page](https://appshunter.io/ios/app/number-blocks-16/id6754715658)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RainbowSifter free?

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

### Is Number Blocks 16 free?

Number Blocks 16 costs $0.49, with no in-app purchases.

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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.*