# Parallel vs METRO Fast Line

The clearest difference is iOS requirement: METRO Fast Line at 13.0 against Parallel's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Parallel ships an update every 3 months, METRO Fast Line every 4 months. The most recent releases landed on September 25, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Parallel | METRO Fast Line |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 18.2% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | — | Free |
| Size | 69 MB | 37 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [PARALLEL-M LTD, TOV](https://appshunter.io/developer/1546104905) | [Supersmart LTD](https://appshunter.io/developer/1300185255) |

## What reviewers say

### Parallel

[App page](https://appshunter.io/ios/app/parallel/id1546727963)

**In-app purchases:** none


### METRO Fast Line

[App page](https://appshunter.io/ios/app/metro-fast-line/id1570663627)

Streamline your shopping with this app that lets you scan items as you go and skip checkout lines. Enjoy a fast, secure, and convenient purchasing experience by scanning cart QR codes and product barcodes.

**Highlights:** Scan product barcodes, Scan cart QR code, Skip checkout queues, Fast and convenient shopping, Cost-saving checkout system

**In-app purchases:** none


## Frequently asked questions

### Is Parallel free?

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

### Is METRO Fast Line free?

METRO Fast Line is free to download, with no in-app purchases.

### Do Parallel or METRO Fast Line have ads?

Neither Parallel nor METRO Fast Line shows ads.

### Which is updated more often, Parallel or METRO Fast Line?

Parallel ships an update every 3 months, and METRO Fast Line every 4 months. Most recently, Parallel was updated on September 25, 2026 and METRO Fast Line on October 1, 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.*