# FRITZ!App Fon vs DATEV SmartLogin

FRITZ!App Fon and DATEV SmartLogin both sit at 4.5 stars, but that hides the real split: 80% of DATEV SmartLogin's written reviews are positive against 53% of FRITZ!App Fon's. DATEV SmartLogin also leads on update cadence (every 3 weeks vs every 2 months). FRITZ!App Fon's advantage is ratings volume (83K vs 265). On price, rating, 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.

On the App Store both sit at effectively the same score — 4.5 for FRITZ!App Fon against 4.5 for DATEV SmartLogin. That said, the two scores are not equally well evidenced: FRITZ!App Fon has 83K ratings behind it against 265, so its average is the more settled of the two. Written reviews are what separate them: 53% of FRITZ!App Fon's written reviews are positive against 80% of DATEV SmartLogin's.

FRITZ!App Fon ships an update every 2 months, DATEV SmartLogin every 3 weeks. The most recent releases landed on September 25, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | FRITZ!App Fon | DATEV SmartLogin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (83K ratings)](https://appshunter.io/ios/app/fritzapp-fon/id372184475/reviews) | **[4.5 (265 ratings)](https://appshunter.io/ios/app/datev-smartlogin/id943870921/reviews)** |
| Number of ratings | **83K** | 265 |
| Positive reviews | 53.5% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 93 MB | 39 MB |
| Requires iOS | **15.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AVM GmbH](https://appshunter.io/developer/372184478) | [DATEV eG](https://appshunter.io/developer/353479704) |

## What reviewers say

### FRITZ!App Fon

[App page](https://appshunter.io/ios/app/fritzapp-fon/id372184475)

This app allows you to make and receive calls using your home's fixed-line network and internet connection through your FRITZ!Box. It runs in the background, ensuring you never miss a call and can easily access your phone book and answering machine.

**Highlights:** Make calls via FRITZ!Box, Receive calls via FRITZ!Box, Background operation, Access phone book, Use answering machine

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Easy setup and configuration process
- 🎯 Use mobile as landline extension via WiFi/VPN
- 📞 Call screening and spam filtering capabilities
- 🔊 HD voice quality when working properly
- 📋 Integrated call history and contact synchronization

**What reviewers complain about**

- 🐛 Poor call quality and audio dropouts
- 🔌 Unreliable connection to Fritz!Box
- 🔋 Severe battery drain and background activity issues
- 📵 No incoming call notifications in background
- 🎤 Microphone not heard by other party

**Reported bugs**

- No incoming calls when VPN is active
- Calls not ringing in background mode
- Audio delay when switching to speakerphone/headphones
- Contact names not resolving in call list
- App freezes during login with Fritz!Box

**Requested features**

- Call transfer functionality to other extensions
- Apple Watch app support with CallKit integration
- Delete call list entries functionality
- Search function in contact list
- Fax sending capability


### DATEV SmartLogin

[App page](https://appshunter.io/ios/app/datev-smartlogin/id943870921)

This app provides secure and intuitive access to your confidential data within the DATEV online world. Simply scan a QR code with the app to log in to DATEV online applications. A password protects the app from unauthorized use.

**Highlights:** Secure QR code scanning for login, Intuitive and simple interface, Password protection for app access, Authentication for DATEV online services, Phishing prevention measures

**In-app purchases:** none


## Frequently asked questions

### Is FRITZ!App Fon free?

FRITZ!App Fon is free to download, with no in-app purchases.

### Is DATEV SmartLogin free?

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

### Which has better reviews, FRITZ!App Fon or DATEV SmartLogin?

DATEV SmartLogin is rated higher. FRITZ!App Fon averages 4.5 out of 5 from 83K ratings, while DATEV SmartLogin averages 4.5 from 265 ratings.

### Do FRITZ!App Fon or DATEV SmartLogin have ads?

Neither FRITZ!App Fon nor DATEV SmartLogin shows ads.

### Which is updated more often, FRITZ!App Fon or DATEV SmartLogin?

FRITZ!App Fon ships an update every 2 months, and DATEV SmartLogin every 3 weeks. Most recently, FRITZ!App Fon was updated on September 25, 2026 and DATEV SmartLogin on September 24, 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.*