# Rocket 123s — Learn Your 123s

> Neuroscience-based number learning app for children aged 3-7. (iPhone/iPad app by Donalee Markus.)

- Source: https://appshunter.io/ios/app/rocket-123s/id1304335839 (this page in markdown: same URL + `.md`)
- Developer: [Donalee Markus](https://appshunter.io/developer/396769078)
- Category: Games, Education, Family, Puzzle
- Price: $5.99
- Rating: 5.00/5 from 2 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.3 · 166 MB
- Languages: English
- Released: 2018-03-03
- Data updated: 2026-06-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/rocket-123s/id1304335839/reviews.md

## What is Rocket 123s?

A clinical-grade learning app that helps children ages 3–7 recognize, sort, and develop foundational understanding of numbers — designed by Dr. Donalee Markus, a Northwestern-trained neuroscientist with 40 years of practice working with children.

WHAT IT TEACHES

• Number recognition (1–10 and beyond)

• Form constancy — recognizing the same number across fonts and styles

• Number sorting and basic sequencing

• Foundations of mathematical reasoning

• Visual processing of numerical symbols

WHO IT'S FOR

• Children ages 3–7

• Pre-K and kindergarten learners

• Children with learning differences who benefit from explicit practice

• Children with delayed math readiness

• Used by parents, teachers, and clinicians

WHAT MAKES IT DIFFERENT

Rocket 123s is built on the same three-pillar neurocognitive model that Dr. Markus uses with adult patients — Attention, Intention, Rehearsal. The exercises are hierarchical and progressive, designed to build genuine skill rather than just keep a child engaged.

ABOUT THE DEVELOPER

Dr. Donalee Markus has practiced cognitive restructuring since 1983, including extensive work with children. She earned her Ph.D. at Northwestern University and completed post-doctoral training under Reuven Feuerstein.

## Key features

- Number recognition 1-10+
- Form constancy
- Number sorting and sequencing
- Foundations of mathematical reasoning
- Visual processing of numerical symbols
- Designed by neuroscientist

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/rocket-123s/id1304335839/reviews.md

### 5/5 — Great for speech therapy as well!

*2019-04-19*

I am a speech therapist, and I downloaded this app and the Rocket ABCs. I have been using them for an adult patient with a reading impairment (alexia) and a vision impairment (field cut). It has been fantastic. The format is simple enough that she can understand what she’s supposed to do and the graphics are well done but not too immature for adults. She really enjoys it. If I were working with a child learning his/her numbers, I would definitely recommend it as well since teaches them to identify the numbers in a variety of contexts/orientations.

## Frequently asked questions about Rocket 123s

### What ages is Rocket 123s designed for?

Rocket 123s is designed for children ages 3–7, including pre-K and kindergarten learners. It is also beneficial for children with learning differences who require explicit practice with numbers.

### What specific math skills does Rocket 123s teach?

Rocket 123s teaches number recognition from 1–10 and beyond, form constancy (recognizing numbers across different fonts), number sorting, basic sequencing, and the foundations of mathematical reasoning and visual processing of numerical symbols.

### What is the cognitive model behind Rocket 123s?

Rocket 123s is built on a three-pillar neurocognitive model: Attention, Intention, and Rehearsal. This model, used by Dr. Donalee Markus, focuses on building genuine skill through hierarchical and progressive exercises.

### Who developed Rocket 123s?

Rocket 123s was designed by Dr. Donalee Markus, a neuroscientist with 40 years of experience working with children. She earned her Ph.D. at Northwestern University and completed post-doctoral training under Reuven Feuerstein.

### What devices does Rocket 123s support?

Rocket 123s is available on iPhone, iPad, and iPod. It is designed for iOS devices.

### How much does Rocket 123s cost?

Rocket 123s is a paid app priced at $5.99. There are no in-app purchases or advertisements.

### How often is Rocket 123s updated?

The latest version of Rocket 123s is 2.1, which was last updated on May 11, 2026. The app was originally released on March 3, 2018.

### Does Rocket 123s have ads?

No, Rocket 123s does not contain advertisements. It is a paid application focused on providing an uninterrupted learning experience for children.

## Version history (last 5 releases)

### 2.1 — 2026-05-11

What's New
• Updated number library
• Improved progression
• Stability fixes

### 2.0.2 — 2024-03-04

Updated Graphic and font variations.

### 2.0.1 — 2020-12-21

- updated Graphic User Interface and theme

### 1.9.1 — 2020-06-26

- Updated UI interface

### 1.9 — 2020-06-01

- Updated number to include underscore

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## More apps by Donalee Markus

- [Strong Mind Puzzles](https://appshunter.io/ios/app/strong-mind-puzzles/id396769075)
- [BYOPuzzles](https://appshunter.io/ios/app/byopuzzles/id695457968)
- [Strong Mind Mazes](https://appshunter.io/ios/app/strong-mind-mazes/id1141474443)
- [Rocket ABCs Print](https://appshunter.io/ios/app/rocket-abcs-print/id1270346054)
- [Strong Mind Estimator](https://appshunter.io/ios/app/strong-mind-estimator/id1383404371)

All apps by Donalee Markus: https://appshunter.io/developer/396769078

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*