# Caffè Marino vs BlueGrays

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

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

Caffè Marino ships an update every 10 days, BlueGrays every 6 days. The most recent releases landed on October 11, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Caffè Marino | BlueGrays |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 days | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 372 MB | 51 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rocco Iezzi](https://appshunter.io/developer/1688990622) | [Yunus Emre Eke](https://appshunter.io/developer/1713998736) |

## What reviewers say

### Caffè Marino

[App page](https://appshunter.io/ios/app/caffe-marino/id6449422343)

**Features:** macOS Compatibility, Apple Wallet

**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 Caffè Marino free?

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

### Is BlueGrays free?

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

### Do Caffè Marino or BlueGrays have ads?

BlueGrays shows ads; Caffè Marino does not.

### Which is updated more often, Caffè Marino or BlueGrays?

Caffè Marino ships an update every 10 days, and BlueGrays every 6 days. Most recently, Caffè Marino was updated on October 11, 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.*