# RMB Games vs Einstein's Relativity

The clearest difference is update cadence: RMB Games at every 10 months against Einstein's Relativity's every 24 months. Einstein's Relativity's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. RMB Games sells 7 in-app purchases, starting at $4.99 per month and Einstein's Relativity sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

RMB Games ships an update every 10 months, Einstein's Relativity every 24 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RMB Games | Einstein's Relativity |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (485 ratings)](https://appshunter.io/ios/app/rmb-games-pre-k-learning-park/id1507729133/reviews)** | — |
| Number of ratings | **485** | — |
| Positive reviews | 84.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 10 months** | Every 24 months |
| Monetization | Free with in-app purchases | — |
| Size | 350 MB | 322 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RMB INVESTMENT COMPANY, INC](https://appshunter.io/developer/1447019266) | [Human Heroes Ltd](https://appshunter.io/developer/1442853426) |

## What reviewers say

### RMB Games

[App page](https://appshunter.io/ios/app/rmb-games-pre-k-learning-park/id1507729133)

An interactive educational game designed for preschoolers aged 1 and up. It features over 200 objects and animals across 44 levels, helping children learn numbers, letters, colors, shapes, and develop cognitive skills through engaging activities and native speaker pronunciation.

**Highlights:** Learn numbers and counting, Learn letters and new words, Recognize colors and shapes, Develop thinking skills, Develop motor skills, Interactive thematic games

**Features:** Family Sharing

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pre-K Learning: 1 Month Access | $4.99 | per month |
| Pre-K Learning: 1 Year Access | $39.99 | per year |
| World of Alphabet 2 for Babies | $3.99 | one-time |
| World of Numbers 2 for Kids | $3.99 | one-time |
| World of Sorting for Kids | $3.99 | one-time |
| Smart Kids - Adventure World | $3.99 | one-time |
| Full version: Smart baby games | $5.99 | one-time |

**What reviewers like**

- 👍 Engaging and cute game
- 👍 Good educational content (counting, alphabet, sorting)
- 👍 Praised by many children and mothers globally
- 👍 Useful for basic learning
- 👍 Fun activities for toddlers

**What reviewers complain about**

- 🐛 No sound issue reported multiple times
- 🐛 Lack of guidance in the app

**Reported bugs**

- Sound does not work
- No sound or guidance in the app

**Requested features**

- Fix sound issue
- Provide guidance within the app


### Einstein's Relativity

[App page](https://appshunter.io/ios/app/einsteins-relativity/id6468444718)

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| The Sensation of Seconds | $0.99 | one-time |
| The Cadence Of Clocks | $0.99 | one-time |


## Frequently asked questions

### Is RMB Games free?

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

### Is Einstein's Relativity free?

Einstein's Relativity is free to download, with in-app purchases available.

### Do RMB Games or Einstein's Relativity have ads?

Neither RMB Games nor Einstein's Relativity shows ads.

### Which is updated more often, RMB Games or Einstein's Relativity?

RMB Games ships an update every 10 months, and Einstein's Relativity every 24 months. Most recently, RMB Games was updated on October 24, 2026 and Einstein's Relativity 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.*