Flippy the Train

Name: Flippy the Train
Rating: 5 (5 reviews)
Author: Karl Voskuil

By: Karl Voskuil App

Puzzle

Overview

Version:

1.7

Last updated: 2025-12-15

Ranking

#436,243 ▲ 167

Overall

Features & Capabilities

Build a train track to solve digital circuitry puzzles!

Flippy the Train rides the rails, flipping switches to model basic digital circuitry: NOT, AND, and OR logic gates.

After building these basics, reuse them in larger tracks to create the more-complex XOR gate and half-adder. What is the fewest number of track segments required to build a half-adder?

Includes a sandbox mode for creating arbitrary track for Flippy to ride.

User Growth & Download Statistics

App

By:

Karl Voskuil

Rating:

5.00

(5)

Version:

1.7 Last updated: 2025-12-15

Version code:

880615721

Creation date:

2015-02-12

Compatible devices:

Size:

3.07MB

URLs:

Full description:

Source:

Apple Apps Store

Data ingested on:

2026-08-16

Compare stats and ranking:

Ranking

# 436,243 ▲ 167

For Developers

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Contact the developer

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Developed by:

Karl Voskuil

Apple Apps Store

https://apps.apple.com/us/app/flippy-the-train/id957889052

User Reviews

The logical challenge is real, especially on levels 3 and 4, but then that’s it, unless you redo levels to get a better score…but there is no system for rating one’s score, other than comparison to oneself. In other words, no number of stars, or color of stars, or anything. Very sparse. I’m not sure why anyone would use the sandbox mode, although if more challenges were presented, the sandbox mode would be a place to work on them. Because of the sandbox mode, additional logical challenges could easily be added without having to construct new levels.