# Sag's Wien vs U4

The clearest difference is update cadence: Sag's Wien at monthly against U4's every 3 months. Sag's Wien also leads on monetization model (free vs ad-supported). On price, review sentiment, 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.

Sag's Wien ships an update monthly, U4 every 3 months. The most recent releases landed on October 23, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Sag's Wien | U4 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/sags-wien/id1145431444/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | **Free** | Ad-supported |
| Size | 25 MB | 45 MB |
| Requires iOS | 16.4 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stadt Wien](https://appshunter.io/developer/858505368) | [U4-Center Diskothek Betriebs GmbH](https://appshunter.io/developer/1470946325) |

## What reviewers say

### Sag's Wien

[App page](https://appshunter.io/ios/app/sags-wien/id1145431444)

Report city issues directly to the Vienna government via your smartphone. Quickly submit concerns, hazards, or disruptions without an account. Track issue status and receive updates through push notifications.

**Highlights:** Report issues and concerns, No account creation required, List, map, and detail views, Support and follow other issues, Personalized profiles for multi-device use, Push notification status updates

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

**In-app purchases:** none


### U4

[App page](https://appshunter.io/ios/app/u4/id1470946326)

This loyalty program app allows users to earn points through various activities like scanning cards, inviting friends, or social media engagement. Redeem these points for rewards, exclusive offers, and participate in contests. Stay updated on events and news.

**Highlights:** Earn points through activities, Redeem points for rewards, Access exclusive offers, Participate in contests, Stay updated on events and news, Simple login with Facebook or email

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

**In-app purchases:** none


## Frequently asked questions

### Is Sag's Wien free?

Sag's Wien is free to download, with no in-app purchases.

### Is U4 free?

U4 is free to download, with no in-app purchases.

### Do Sag's Wien or U4 have ads?

Neither Sag's Wien nor U4 shows ads.

### Which is updated more often, Sag's Wien or U4?

Sag's Wien ships an update monthly, and U4 every 3 months. Most recently, Sag's Wien was updated on October 23, 2026 and U4 on October 14, 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.*