# FRB FlatrateBooster vs MultiPhone.

The clearest difference is review sentiment: MultiPhone. at 40% against FRB FlatrateBooster's 0%. MultiPhone. also leads on iOS requirement (11.0 vs 15.5). FRB FlatrateBooster's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. MultiPhone. sells 1 one-off in-app purchase. FRB FlatrateBooster asks for nothing beyond the download.

FRB FlatrateBooster ships an update monthly, MultiPhone. every 9 months. The most recent releases landed on September 19, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | FRB FlatrateBooster | MultiPhone. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.0 (1 ratings)](https://appshunter.io/ios/app/multiphone/id939504418/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 0.0% of reviews | **40.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 9 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 10 MB | 46 MB |
| Requires iOS | 15.5 | **11.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [DALASON GmbH](https://appshunter.io/developer/531312222) | [Multiphone Latin America](https://appshunter.io/developer/531153322) |

## What reviewers say

### FRB FlatrateBooster

[App page](https://appshunter.io/ios/app/frb-flatratebooster/id531312219)

Make ultra-low-cost international calls and save on calls to German mobile numbers. This app routes calls via landline or freephone numbers, offering up to 99% savings. It provides cost control, uses your existing contacts, and ensures superb voice quality without internet calls.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### MultiPhone.

[App page](https://appshunter.io/ios/app/multiphone/id939504418)

Easily send international mobile top-ups and make high-quality international calls. Get a local number to receive calls from abroad, keeping you connected with loved ones worldwide.

**Highlights:** Instant international mobile top-ups, High-quality international calls, Receive calls with a local international number, Supports over 100 mobile operators, Redesigned user interface, Free credit for new customers

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Add $10 Credit | $12.99 | one-time |


## Frequently asked questions

### Is FRB FlatrateBooster free?

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

### Is MultiPhone. free?

MultiPhone. is free to download, with in-app purchases available.

### Do FRB FlatrateBooster or MultiPhone. have ads?

MultiPhone. shows ads; FRB FlatrateBooster does not.

### Which is updated more often, FRB FlatrateBooster or MultiPhone.?

FRB FlatrateBooster ships an update monthly, and MultiPhone. every 9 months. Most recently, FRB FlatrateBooster was updated on September 19, 2026 and MultiPhone. on June 11, 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.*