# Rocket 123s vs Sequence

The clearest difference is price: Sequence at Free against Rocket 123s's $5.99. Sequence also leads on update cadence (every 3 months vs every 6 months) and ratings volume (14 vs 2). Rocket 123s's advantage is in-app purchases (none vs 2) and iOS requirement (9.3 vs 17.6). On rating, ads and device support there is nothing between them.

Sequence is free to download; Rocket 123s costs $5.99 up front. Sequence sells 2 one-off in-app purchases. Rocket 123s asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Rocket 123s against 4.9 for Sequence. That said, the two scores are not equally well evidenced: Sequence has 14 ratings behind it against 2, so its average is the more settled of the two.

Rocket 123s ships an update every 6 months, Sequence every 3 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rocket 123s | Sequence |
| --- | --- | --- |
| Price | $5.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/rocket-123s/id1304335839/reviews)** | [4.9 (14 ratings)](https://appshunter.io/ios/app/sequence-a-memory-challenge/id1609878481/reviews) |
| Number of ratings | 2 | **14** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 166 MB | 1 MB |
| Requires iOS | **9.3** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Donalee Markus](https://appshunter.io/developer/396769078) | [Dustin Wiens](https://appshunter.io/developer/1495273178) |

## What reviewers say

### Rocket 123s

[App page](https://appshunter.io/ios/app/rocket-123s/id1304335839)

This educational app helps children ages 3-7 develop foundational number recognition and mathematical reasoning skills. Designed by a neuroscientist, it uses a proven cognitive model to build genuine understanding through progressive exercises.

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Sequence

[App page](https://appshunter.io/ios/app/sequence-a-memory-challenge/id1609878481)

Test your memory by tapping numbered tiles in the correct order. Choose from various difficulty levels, grid sizes, and game modes to challenge yourself. See how long you can last in the infinite mode.

**Highlights:** Memorize numbered tile sequences, Tap tiles in correct order, Multiple difficulty levels, Variable grid sizes, Sequential number mode, Non-sequential number mode, Multiples of 2 mode, Infinite mode

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Non-Consecutive Game | $0.99 | one-time |
| Multiples of 2 | $0.99 | one-time |


## Frequently asked questions

### Is Rocket 123s free?

Rocket 123s costs $5.99, with no in-app purchases.

### Is Sequence free?

Sequence is free to download, with in-app purchases available.

### Which has better reviews, Rocket 123s or Sequence?

Rocket 123s is rated higher. Rocket 123s averages 5.0 out of 5 from 2 ratings, while Sequence averages 4.9 from 14 ratings.

### Do Rocket 123s or Sequence have ads?

Neither Rocket 123s nor Sequence shows ads.

### Which is updated more often, Rocket 123s or Sequence?

Rocket 123s ships an update every 6 months, and Sequence every 3 months. Most recently, Rocket 123s was updated on October 24, 2026 and Sequence on October 30, 2026.

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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.*