# Protos Connect vs Metro Blue Line

The clearest difference is update cadence: Protos Connect at fortnightly against Metro Blue Line's every 4 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Protos Connect ships an update fortnightly, Metro Blue Line every 4 months. The most recent releases landed on October 30, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Protos Connect | Metro Blue Line |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.2 (46 ratings)](https://appshunter.io/ios/app/protos-connect/id1610768348/reviews)** | — |
| Number of ratings | **46** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Free | — |
| Size | 89 MB | 20 MB |
| Requires iOS | **14.2** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Protos Security, LLC.](https://appshunter.io/developer/1610768350) | [Metro Blue Line](https://appshunter.io/developer/1713647639) |

## What reviewers say

### Protos Connect

[App page](https://appshunter.io/ios/app/protos-connect/id1610768348)

This security application offers security officers essential tools and insights for site protection. It helps in safeguarding client sites by addressing their specific requirements.

**Highlights:** Security officer tools, Site safeguarding insights, Client site protection, Unique requirement management

**Features:** Vision Pro support

**In-app purchases:** none


### Metro Blue Line

[App page](https://appshunter.io/ios/app/metro-blue-line/id6470419076)

**In-app purchases:** none


## Frequently asked questions

### Is Protos Connect free?

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

### Is Metro Blue Line free?

Metro Blue Line is free to download, with no in-app purchases.

### Do Protos Connect or Metro Blue Line have ads?

Neither Protos Connect nor Metro Blue Line shows ads.

### Which is updated more often, Protos Connect or Metro Blue Line?

Protos Connect ships an update fortnightly, and Metro Blue Line every 4 months. Most recently, Protos Connect was updated on October 30, 2026 and Metro Blue Line on October 3, 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.*