# JCBlock vs M.M.S

The clearest difference is iOS requirement: JCBlock at 12.0 against M.M.S's 15.1. 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.

JCBlock ships an update every 4 months, M.M.S every 3 months. The most recent releases landed on September 22, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | JCBlock | M.M.S |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | — |
| Size | 8 MB | 65 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [InSoo Kim](https://appshunter.io/developer/975978291) | [(주)트루벨류](https://appshunter.io/developer/1523600320) |

## What reviewers say

### JCBlock

[App page](https://appshunter.io/ios/app/jcblock/id1490437926)

Control drones and coding boards using block-based programming. This educational tool allows users to create code for various devices like JDKit, JDCode, JCBoard, and Arduino.

**Highlights:** Block-based coding interface, Drone control (JDKit, JDCode), Coding board control (JCBoard, UglyBot, Arduino, RoboDog), Educational programming tool, Device compatibility

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### M.M.S

[App page](https://appshunter.io/ios/app/mms/id6761164085)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is JCBlock free?

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

### Is M.M.S free?

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

### Do JCBlock or M.M.S have ads?

Neither JCBlock nor M.M.S shows ads.

### Which is updated more often, JCBlock or M.M.S?

JCBlock ships an update every 4 months, and M.M.S every 3 months. Most recently, JCBlock was updated on September 22, 2026 and M.M.S on October 5, 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.*