# Synthiam ARC vs BlueGrays

The clearest difference is in-app purchases: Synthiam ARC at none against BlueGrays's 6. Synthiam ARC also leads on ads (none vs shown) and iOS requirement (8.0 vs 15.1). BlueGrays's advantage is review sentiment (64% vs 50%). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. BlueGrays sells 6 in-app purchases, starting at $2.99 per month. Synthiam ARC asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.4 for Synthiam ARC against 4.4 for BlueGrays. Both are backed by a comparable volume of ratings — 8 and 11 respectively. Written reviews are what separate them: 50% of Synthiam ARC's written reviews are positive against 64% of BlueGrays's.

Synthiam ARC ships an update every 8 days, BlueGrays every 6 days. The most recent releases landed on September 30, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Synthiam ARC | BlueGrays |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (8 ratings)](https://appshunter.io/ios/app/synthiam-arc/id963055524/reviews)** | [4.4 (11 ratings)](https://appshunter.io/ios/app/bluegrays-learn-electronics/id6502332602/reviews) |
| Number of ratings | 8 | **11** |
| Positive reviews | 50.0% of reviews | **64.3% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Every 6 days** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 48 MB | 51 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Synthiam Inc.](https://appshunter.io/developer/963055523) | [Yunus Emre Eke](https://appshunter.io/developer/1713998736) |

## What reviewers say

### Synthiam ARC

[App page](https://appshunter.io/ios/app/synthiam-arc/id963055524)

Control your Synthiam-compatible robot remotely from your iPhone or iPad. This app allows you to load projects created on a PC, offering features like visual programming, movement controls, and autonomous navigation.

**Highlights:** Remote robot control, Visual programming (RoboScratch, Blockly), Movement controls, WiiMote emulator, Audio recording and playback, Streaming audio/video, Autonomous navigation

**Features:** macOS Compatibility

**In-app purchases:** none


### BlueGrays

[App page](https://appshunter.io/ios/app/bluegrays-learn-electronics/id6502332602)

Learn electronics with interactive projects, a component catalog, and personal inventory management. Start with free projects and unlock full access to Arduino, ESP32, and IoT content with a premium subscription. Gamified learning with badges and levels keeps you motivated.

**Highlights:** Free starter projects, Unlimited Arduino/ESP32/IoT projects, Detailed circuit diagrams and code, Component catalog with specifications, Personal inventory management, Gamified learning with badges and levels, Multi-language support

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $2.99 | per month |
| Premium (Yearly) | $11.99 | per year |
| 5x Aylık Eğitimci Paketi | $12.99 | one-time |
| 10x Aylık Eğitimci Paketi | $23.99 | one-time |
| 5x Yıllık Eğitimci Paketi | $53.99 | one-time |
| 10x Yıllık Eğitimci Paketi | $101.99 | one-time |


## Frequently asked questions

### Is Synthiam ARC free?

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

### Is BlueGrays free?

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

### Which has better reviews, Synthiam ARC or BlueGrays?

Synthiam ARC is rated higher. Synthiam ARC averages 4.4 out of 5 from 8 ratings, while BlueGrays averages 4.4 from 11 ratings.

### Do Synthiam ARC or BlueGrays have ads?

BlueGrays shows ads; Synthiam ARC does not.

### Which is updated more often, Synthiam ARC or BlueGrays?

Synthiam ARC ships an update every 8 days, and BlueGrays every 6 days. Most recently, Synthiam ARC was updated on September 30, 2026 and BlueGrays on September 17, 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.*