# TROSA — Measuring the World

> Measuring the World (iPhone/iPad app by TROSA GmbH.)

- Source: https://appshunter.io/ios/app/trosa/id1528843025 (this page in markdown: same URL + `.md`)
- Developer: [TROSA GmbH](https://appshunter.io/developer/1528843207)
- Category: Productivity, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 14.2 · 6 MB
- Languages: English, German
- Released: 2020-08-24
- Data updated: 2026-03-21
- User reviews in markdown: https://appshunter.io/ios/app/trosa/id1528843025/reviews.md

## What is TROSA?

With TROSA for iPhone and iPad, you can measure everything microscopic pairing up with our standard and pocket microscopes. We create value for you by removing the need for investing in a costly CMOS camera setup. TROSA lets you calibrate the scale and share the measurements along with customizations in PDF format.

Key Features of TROSA app for iPhone and iPad:
-Calibration with different scales
-Magnifier
-German Language Support
-Pinch to zoom in and out
-Circle and Rectangle Selection
-Video utility with Multiple Camera Selection
-Camera Selection (switch between all available cameras of your device)
-Snap and Share as image or document
-Customize the measurement and add a note
-Image Filters
  Brightness
  Contrast
  Hue
  Saturation
  Warmth
  Gamma
  Sharpness
  Denoise


TROSA is a part of TROSA GmbH, an optical design, and manufacturing company. TROSA (formerly Karl Zanger and Sons) is a centurial player in the Optical Equipment/Supplies Manufacturing industry.


## Version history (last 4 releases)

### 3.0 — 2024-03-27

-Bug Fixes
-Added calibration support for latest devices
-Improved Camera functionality

### 2.0 — 2021-08-28

-Save the measurements on your local device for future use
-Easy access to recent measurements in the form of a widget
-Added calibration support for latest devices
-Image Crop And Rotate
-Grid
-Edge Detection Image Filters
  Prewitt
  Laplace
  Derivative 
  Sobel
-Smoothening Image Filters
  Bilateral
  Guass

### 1.1 — 2021-01-11

- German Language Support
- Magnifier
- Circle and Rectangle selection
- Camera Selection (switch between all available cameras of your device)

### 1.0 — 2020-08-24

No release notes.

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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 2026-03-21.*