# BlueGrays vs G Blox

The clearest difference is in-app purchases: G Blox at none against BlueGrays's 6. G Blox also leads on ads (none vs shown) and iOS requirement (12 vs 15.1). On price, update cadence and device support there is nothing between them.

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

BlueGrays ships an update every 6 days, G Blox daily. The most recent releases landed on September 17, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | BlueGrays | G Blox |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (11 ratings)](https://appshunter.io/ios/app/bluegrays-learn-electronics/id6502332602/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 days | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 121 MB |
| Requires iOS | 15.1 | **12** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Yunus Emre Eke](https://appshunter.io/developer/1713998736) | [Mingo Blox Ltd](https://appshunter.io/developer/1801221577) |

## What reviewers say

### 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 |


### G Blox

[App page](https://appshunter.io/ios/app/g-blox/id6749778311)

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

**In-app purchases:** none


## Frequently asked questions

### Is BlueGrays free?

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

### Is G Blox free?

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

### Do BlueGrays or G Blox have ads?

BlueGrays shows ads; G Blox does not.

### Which is updated more often, BlueGrays or G Blox?

BlueGrays ships an update every 6 days, and G Blox daily. Most recently, BlueGrays was updated on September 17, 2026 and G Blox on October 6, 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.*