# FRB FlatrateBooster — Virtual Calling Card

> App for making ultra-low-priced international and German mobile calls. (iPhone/iPad app by DALASON GmbH.)

- Source: https://appshunter.io/ios/app/frb-flatratebooster/id531312219 (this page in markdown: same URL + `.md`)
- Developer: [DALASON GmbH](https://appshunter.io/developer/531312222)
- Category: Social Networking, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 15.5 · 10 MB
- Languages: American English, German (Germany)
- Released: 2013-01-09
- Data updated: 2026-06-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/frb-flatratebooster/id531312219/reviews.md

## What is FRB FlatrateBooster?

!!! INTERNATIONAL CALLS STARTING AT 1,9 CENTS !!!

FlatrateBooster is the free app to make ultra low priced international calls from any mobile. FlatrateBooster automatically routes calls to predefined destinations via a landline or freephone phone number.

PLEASE NOTE: Use FlatrateBooster in combination with a provider flat rate for landline numbers for making international calls and save a lot of money! When using FlatrateBooster for calling German mobiles we strongly recommend to use FlatrateBooster only in combination with a flat rate from your provider to German landline numbers. 

WHY FLATRATEBOOSTER?

FlatrateBooster is for everyone who wants to save on calls to other mobile providers or to international destinations! Use FlatrateBooster for these calls and save a lot of money!

UP TO 99% SAVINGS: You can make ultra cheap international calls for 1,9 cent/min or save on German mobile numbers for 8,9 cents/min. Check our price list a complete list of our termination charges at our website.

8,9 CENTS/MIN TO ALL GERMAN MOBILE PROVIDERS: Don't worry about high costs to other mobile providers. Choose yourself for which destinations you want to use FlatrateBooster and start making calls to German mobiles for 8,9 cents/min!

1 EUR FREE CREDIT = 50 FREE MINUTES: You will receive 1 EUR free credit to try out FlatrateBooster without any commitments attached. You can call more than 50 minutes for free to USA, Australia, European landlines or many other countries.

FLATRATEBOOSTER AS AN ADD-ON SERVICE: Keep your SIM card and your mobile number. 

COMPLETE COST CONTROL: Credit and price announcement. Prepaid account. You just pay for your calls. NO monthly fee, NO subscription, NO minimum consumption, NO hidden costs! 

USE YOUR EXISTING CONTACT LIST: No need for another buddylist. Just dial from your telephone address book or dialpad.

SUPERB VOICE QUALITY: No calls via internet. No VoIP.

FLAT RATE TO LANDLINE NUMBERS: The call to the destination is routed through a landline or freephone number. Using a flat rate to landline numbers there are not extra-costs charged by your provider. Use FlatrateBooster for calls to international destinations and to German mobile networks and save a lot of money! For making calls to German mobiles we strongly recommend a flat rate to German landline numbers.

Please note: A slow internet connection may cause a delayed call establishment.

FUTURE FEATURES: Free calls to other FlatrateBooster users!

FlatrateBooster is free and without any in-app advertising. You just pay as you go for calls.
Try out FlatrateBooster for free and even get 1 EUR free credit.

If you have any questions please contact our support team. 
Tel: +49 (0) 221 999 999 39 (weekdays, 10 am to 6 pm) 
E-mail: support@fr-b.de

Your can find our fair GTC and privacy policy on our website.

## Key features

- Ultra low-priced international calls
- Savings on German mobile numbers
- Routes calls via landline/freephone
- Up to 99% savings
- 1 EUR free credit for trial
- No monthly fees or subscriptions
- Superb voice quality

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/frb-flatratebooster/id531312219/reviews.md

### 1/5 — Mr

*2013-01-13*

Totally rubbish waste of time

## Frequently asked questions about FRB FlatrateBooster

### How does FRB FlatrateBooster save money on calls?

FRB FlatrateBooster routes your calls through predefined landline or freephone numbers. If you have a flat rate for landline calls with your provider, this can significantly reduce or eliminate extra charges for international and German mobile destinations.

### Can I try FRB FlatrateBooster for free?

Yes, you receive 1 EUR of free credit upon signing up, which allows for over 50 free minutes to destinations like the USA, Australia, and European landlines. This lets you test the service without any initial commitment.

### Does FRB FlatrateBooster have ads?

No, FRB FlatrateBooster is free and without any in-app advertising. You only pay for the calls you make, with a clear prepaid account and cost control.

### What are the call rates with FRB FlatrateBooster?

International calls start at 1.9 cents per minute, and calls to all German mobile providers are 8.9 cents per minute. Specific rates for all termination charges can be found on their website.

### Do I need a new SIM card or number to use FRB FlatrateBooster?

No, FRB FlatrateBooster works as an add-on service. You keep your existing SIM card and mobile number while using the app for your calls.

### Is FRB FlatrateBooster available on all devices?

Based on the provided data, FRB FlatrateBooster is supported on iPhone and iPod devices. It is not specified if it is available for Android.

### How often is FRB FlatrateBooster updated?

The latest version of FRB FlatrateBooster is 1.2.4, which was last updated on June 2, 2022. This indicates a relatively infrequent update schedule.

### What is the age rating for FRB FlatrateBooster?

FRB FlatrateBooster has an age rating of 4+. This suggests it is suitable for a wide audience, including children.

## Version history (last 5 releases)

### 1.2.4 — 2022-06-02

Fixed issue with contact list

### 1.2.3 — 2022-05-25

Fixed problem with eSIM
General Improvements

### 1.2.2 — 2016-04-26

This app has been updated by Apple to display the Apple Watch app icon.

Minor text changes

### 1.2.1 — 2016-04-20

Possibility to dial all calls via FlatrateBooster for international Flatrates
Bugfixing

### 1.2.0 — 2016-04-11

Option to route all calls when in roaming (makes sense for some providers)

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## More apps by DALASON GmbH

- [DCalling WIFI](https://appshunter.io/ios/app/dcalling-wifi/id914980809)

All apps by DALASON GmbH: https://appshunter.io/developer/531312222

## Related topics

[frb flatratebooster](https://appshunter.io/ios/topics/frb-flatratebooster) · [dalason gmbh](https://appshunter.io/ios/topics/dalason-gmbh)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-05.*