# RxMarbles vs TeachMeSign

The clearest difference is device support: RxMarbles at 3 against TeachMeSign's 1. RxMarbles also leads on iOS requirement (9.2 vs 17.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on September 25, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | RxMarbles | TeachMeSign |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (16 ratings)](https://appshunter.io/ios/app/rxmarbles/id1087272442/reviews)** | — |
| Number of ratings | **16** | — |
| Positive reviews | 84.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | Free | — |
| Size | 21 MB | 122 MB |
| Requires iOS | **9.2** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AnjLab](https://appshunter.io/developer/501327862) | [Innowise Group](https://appshunter.io/developer/1417177077) |

## What reviewers say

### RxMarbles

[App page](https://appshunter.io/ios/app/rxmarbles/id1087272442)

Visualize and understand ReactiveX observable sequences with interactive diagrams. This educational tool helps developers grasp complex asynchronous programming concepts by illustrating event-based data streams and composition operators.

**Highlights:** Interactive observable diagrams, Visualization of event streams, Demonstration of composition operators, Educational tool for asynchronous programming, Explains observer pattern extensions

**Features:** macOS Compatibility

**In-app purchases:** none


### TeachMeSign

[App page](https://appshunter.io/ios/app/teachmesign/id6736827510)

**In-app purchases:** none


## Frequently asked questions

### Is RxMarbles free?

RxMarbles is free to download, with no in-app purchases.

### Is TeachMeSign free?

TeachMeSign is free to download, with no in-app purchases.

### Do RxMarbles or TeachMeSign have ads?

Neither RxMarbles nor TeachMeSign shows ads.

### Which is updated more often, RxMarbles or TeachMeSign?

RxMarbles ships an update every 4 months, and TeachMeSign every 4 months. Most recently, RxMarbles was updated on September 25, 2026 and TeachMeSign on September 21, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*