# TROVIS 55Pro vs Biral ONE.

The clearest difference is update cadence: Biral ONE. at every 2 months against TROVIS 55Pro's every 8 months. TROVIS 55Pro's advantage is iOS requirement (9.0 vs 16.6). 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.

TROVIS 55Pro ships an update every 8 months, Biral ONE. every 2 months. The most recent releases landed on October 26, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | TROVIS 55Pro | Biral ONE. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 2 months** |
| Size | 23 MB | 74 MB |
| Requires iOS | **9.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [KT-Elektronik, Klaucke und Partner GmbH](https://appshunter.io/developer/943003350) | [Biral](https://appshunter.io/developer/391078663) |

## What reviewers say

### TROVIS 55Pro

[App page](https://appshunter.io/ios/app/trovis-55pro/id943003351)

**Features:** macOS Compatibility

**In-app purchases:** none


### Biral ONE.

[App page](https://appshunter.io/ios/app/biral-one/id1465584793)

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

**In-app purchases:** none


## Frequently asked questions

### Is TROVIS 55Pro free?

TROVIS 55Pro is free to download, with no in-app purchases.

### Is Biral ONE. free?

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

### Do TROVIS 55Pro or Biral ONE. have ads?

Neither TROVIS 55Pro nor Biral ONE. shows ads.

### Which is updated more often, TROVIS 55Pro or Biral ONE.?

TROVIS 55Pro ships an update every 8 months, and Biral ONE. every 2 months. Most recently, TROVIS 55Pro was updated on October 26, 2026 and Biral ONE. on October 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.*