# Metro Blue Line vs Protos Select

The clearest difference is update cadence: Protos Select at every 3 weeks 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.

Metro Blue Line ships an update every 4 months, Protos Select every 3 weeks. The most recent releases landed on September 15, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | Metro Blue Line | Protos Select |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.4 (30 ratings)](https://appshunter.io/ios/app/protos-select/id6474273692/reviews)** |
| Number of ratings | — | **30** |
| Positive reviews | — | 6.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | — | Free |
| Size | 20 MB | 70 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Metro Blue Line](https://appshunter.io/developer/1713647639) | [Protos Security, LLC.](https://appshunter.io/developer/1610768350) |

## What reviewers say

### Metro Blue Line

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

**In-app purchases:** none


### Protos Select

[App page](https://appshunter.io/ios/app/protos-select/id6474273692)

This platform connects active and retired police officers with flexible off-duty work opportunities. Easily discover, apply for, and manage shifts that fit your schedule, ensuring a better work-life balance. It's designed by officers, for officers, to simplify finding extra work and maintain financial stability.

**Highlights:** Off-duty shift discovery, Job application management, Integrated work calendar, GPS-verified clock in/out, Shift update notifications, Incident reporting with photos

**In-app purchases:** none


## Frequently asked questions

### Is Metro Blue Line free?

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

### Is Protos Select free?

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

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

Neither Metro Blue Line nor Protos Select shows ads.

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

Metro Blue Line ships an update every 4 months, and Protos Select every 3 weeks. Most recently, Metro Blue Line was updated on September 15, 2026 and Protos Select on September 5, 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.*