Rocket 123s is made and published by Donalee Markus. AppBrain is an independent app data site and isn't affiliated with Donalee Markus. The app name, icon, screenshots and description belong to Donalee Markus and are shown as published on the App Store.

About Rocket 123s

Rocket 123s is a games app developed by Donalee Markus.

User Ratings

Rocket 123s is rated 5.00 out of 5 stars. The rating is based on 2 ratings.

App Information

Rocket 123s costs $5.99. The app size is 165.87 MB. The latest version available is 2.1. The last update was on May 11, 2026.

Technical Requirements

The app has a content rating of Everyone. The app has been available on the App Store since March 2018.

Description by Donalee Markus (from the App Store)

A clinical-grade learning app that helps children ages 3–7 recognize, sort, and develop foundational understanding of numbers — designed by Dr.

Screenshots

Screenshots by Donalee Markus, from the the App Store listing

Official page on the App Store

Alternatives to Rocket 123s

Changelog of Rocket 123s

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Developer information for Donalee Markus

Donalee Markus

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App Store Rankings for Rocket 123s

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Technologies used by Rocket 123s

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Rocket 123s