# Flippy the Train vs NAND

The clearest difference is iOS requirement: Flippy the Train at 13.0 against NAND's 15.1. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Flippy the Train | NAND |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (5 ratings)](https://appshunter.io/ios/app/flippy-the-train/id957889052/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Monetization | Free | — |
| Size | 3 MB | 49 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Karl Voskuil](https://appshunter.io/developer/957889051) | [Emma Salinas](https://appshunter.io/developer/1679256383) |

## What reviewers say

### Flippy the Train

[App page](https://appshunter.io/ios/app/flippy-the-train/id957889052)

Solve digital circuitry puzzles by building train tracks that model logic gates like NOT, AND, and OR. Challenge yourself to create complex circuits such as XOR gates and half-adders with minimal track segments. Explore a sandbox mode for freeform track creation.

**Highlights:** Digital circuitry puzzles, Logic gate simulation (NOT, AND, OR, XOR), Half-adder circuit challenges, Sandbox mode for track creation, Minimal track segment challenges

**Features:** macOS Compatibility

**In-app purchases:** none


### NAND

[App page](https://appshunter.io/ios/app/nand/id6748240836)

**In-app purchases:** none


## Frequently asked questions

### Is Flippy the Train free?

Flippy the Train is free to download, with no in-app purchases.

### Is NAND free?

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

### Do Flippy the Train or NAND have ads?

Neither Flippy the Train nor NAND shows ads.

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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.*