# ZTrails vs SMOU

The clearest difference is update cadence: SMOU at every 6 weeks against ZTrails's every 5 months. ZTrails's advantage is iOS requirement (15.5 vs 17.0). 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.

ZTrails ships an update every 5 months, SMOU every 6 weeks. Both last shipped on October 29, 2026.

## The numbers

| Metric | ZTrails | SMOU |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.3 (722 ratings)](https://appshunter.io/ios/app/smou-mobility-services/id1439898721/reviews)** |
| Number of ratings | — | **722** |
| Positive reviews | — | 4.1% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 35 MB | 437 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [GeoSLab](https://appshunter.io/developer/830485894) | [Ajuntament de Barcelona](https://appshunter.io/developer/303950690) |

## What reviewers say

### ZTrails

[App page](https://appshunter.io/ios/app/ztrails/id1198972814)

**In-app purchases:** none


### SMOU

[App page](https://appshunter.io/ios/app/smou-mobility-services/id1439898721)

This app consolidates various urban mobility services in Barcelona and its metropolitan area. It allows users to pay for parking, book taxis, manage resident parking, and access public transport information and shared mobility options.

**Highlights:** Pay for blue zone parking meters, Find and pay for parking spaces, Book and pay for taxis, Manage resident parking, Access public transport information, Use shared mobility services (bikes, scooters, cars)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 🚀 Great idea but slowest app ever
- 👍 Excellent app for connecting transportation options

**What reviewers complain about**

- 🐛 Glitchy, buggy, and unreliable
- 🔍 Confusing user interface
- 🚲 Lack of available and working bikes
- 🤷‍♂️ Not made for tourists
- 💳 Annual subscription only

**Reported bugs**

- Frequent app crashes and disconnections
- Issues with email verification and login
- Incorrect bike availability information
- Problems with reserving and unlocking bikes

**Requested features**

- Ability to report broken bikes
- Faster QR code scanning
- NFC integration for bike unlocking
- Offline access to Bicing card
- Improved real-time availability of bikes


## Frequently asked questions

### Is ZTrails free?

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

### Is SMOU free?

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

### Do ZTrails or SMOU have ads?

Neither ZTrails nor SMOU shows ads.

### Which is updated more often, ZTrails or SMOU?

ZTrails ships an update every 5 months, and SMOU every 6 weeks. Most recently, ZTrails was updated on October 29, 2026 and SMOU on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*