# BlueGrays vs Microelectronics

The clearest difference is rating: Microelectronics at 5.0 against BlueGrays's 4.2. BlueGrays's advantage is update cadence (every 4 days vs every 3 months) and ratings volume (14 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. BlueGrays sells 8 in-app purchases, starting at $2.99 per month and Microelectronics sells 6 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

Microelectronics holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: BlueGrays has 14 ratings behind it against 1, so its average is the more settled of the two.

BlueGrays ships an update every 4 days, Microelectronics every 3 months. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | BlueGrays | Microelectronics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (14 ratings)](https://appshunter.io/ios/app/bluegrays-arduino-projects/id6502332602/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/microelectronics/id6739470018/reviews)** |
| Number of ratings | **14** | 1 |
| Positive reviews | 64.3% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 52 MB | 18 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yunus Emre Eke](https://appshunter.io/developer/1713998736) | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) |

## What reviewers say

### BlueGrays

[App page](https://appshunter.io/ios/app/bluegrays-arduino-projects/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 (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $2.99 | per month |
| Premium (Monthly) | $4.99 | per month |
| Premium (Yearly) | $11.99 | per year |
| Premium (Yearly) | $19.99 | per year |
| 5x Aylık Eğitimci Paketi | $24.99 | one-time |
| 10x Aylık Eğitimci Paketi | $39.99 | one-time |
| 5x Yıllık Eğitimci Paketi | $99.99 | one-time |
| 10x Yıllık Eğitimci Paketi | $159.99 | one-time |


### Microelectronics

[App page](https://appshunter.io/ios/app/microelectronics/id6739470018)

Test your knowledge of circuits, semiconductors, and advanced microelectronic concepts with a vast quiz. Features dynamic difficulty, detailed explanations, and progress tracking to help you master the subject. Ideal for students, engineers, and enthusiasts.

**Highlights:** Thousands of questions, Dynamic difficulty levels, Detailed explanations, Progress tracking, Regular updates, Covers digital and analog circuits

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


## Frequently asked questions

### Is BlueGrays free?

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

### Is Microelectronics free?

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

### Which has better reviews, BlueGrays or Microelectronics?

Microelectronics is rated higher. BlueGrays averages 4.2 out of 5 from 14 ratings, while Microelectronics averages 5.0 from 1 ratings.

### Do BlueGrays or Microelectronics have ads?

Neither BlueGrays nor Microelectronics shows ads.

### Which is updated more often, BlueGrays or Microelectronics?

BlueGrays ships an update every 4 days, and Microelectronics every 3 months. Most recently, BlueGrays was updated on October 25, 2026 and Microelectronics on October 21, 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.*