# CASSY App

> Mobile app for controlling and analyzing scientific sensor measurements. (iPhone/iPad app by LD DIDACTIC GmbH.)

- Source: https://appshunter.io/ios/app/cassy-app/id1083056851 (this page in markdown: same URL + `.md`)
- Developer: [LD DIDACTIC GmbH](https://appshunter.io/developer/1083056850)
- Category: Education
- Price: Free
- Age rating: 4+
- Requires: iOS 15.0 · 74 MB
- Languages: German
- Released: 2016-11-25
- Data updated: 2026-06-03
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/cassy-app/id1083056851/reviews.md

## What is CASSY App?

With the CASSY App, students and teachers can measure, observe and analyse using CASSY – on an iPad or iPhone.

It’s simple and practical for everyday use: just type in the PIN from the CASSY display or scan the QR code and start measuring straight away.

- Free experimentation without fixed experimental parameters
- Group measurements: connect up to 4 devices to a single CASSY simultaneously
- Live measurement results on an external display in digital and analogue displays, tables and diagrams
- Free configuration of measurements
- Comparison of multiple measurements
- Individual evaluation per student
- Save results and load measured values for analysis
- Exam mode for exam security (configurable via CASSY teaching profiles on our LeyLab online portal)
- Can be used without internet access

The CASSY App supports all CASSY sensors and the following CASSY devices:
- Mobile-CASSY 2 WiFi (524 005W2, 524 005W)
- Power Analyser CASSY (727 101, 727 111)
- Machine Test CASSY (773 1901, 773 2901)
- Converter Controller CASSY (773 5291)
- Power Control CASSY (773 530)

You can obtain a compatible CASSY and the sensors from LD DIDACTIC GmbH. Further information can be found on our website.

## Key features

- Control CASSY devices
- Display measurements (analog/digital, tables, diagrams)
- Evaluate and store data
- Share results wirelessly
- Support for physics, chemistry, and biology sensors
- WebDAV server integration

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/cassy-app/id1083056851/reviews.md

### 5/5 — Tut, was sie soll

*2024-02-29*

Die App funktioniert, die WEB-APP ist aber besser, findet man unter cassy.app im Netz und ist mehr oder weniger selbsterklärend.

### 2/5 — Friert oft ein

*2022-02-09*

Die App friert sehr oft beim Verstellen der Messbereiche ein.

### 1/5 — Naja

*2021-09-14*

Ist schlecht

### 5/5 — Schöne Ergänzung

*2020-08-03*

👍👍 Schöne Ergänzung zum mobile cassy

## Frequently asked questions about CASSY App

### What is CASSY App used for?

CASSY App allows you to control CASSY scientific measurement devices and view sensor data on your iPad, iPhone, or iPod touch. You can analyze, store, and share your experimental results directly from your device.

### What types of sensors does CASSY App support?

CASSY App supports a wide array of sensors for physics, chemistry, and biology. This includes sensors for voltage, current, force, velocity, acceleration, magnetic field, pH value, conductivity, pulse, and skin resistance.

### Which CASSY devices are compatible with the app?

The app is compatible with Mobile-CASSY 2 WLAN, Sensor-CASSY with WLAN adapter, and Power Analyser CASSY devices. Ensure your CASSY device is connected to the same WiFi network as your mobile device.

### How do I connect my CASSY device to the app?

To connect, ensure your CASSY device is on the same WiFi network as your iPad, iPhone, or iPod touch. You will then enter the PIN displayed by the device or select it directly within the app to start measuring.

### Can I save and share my measurement data?

Yes, measured values can be stored, loaded, and shared. The *.labm file format is compatible with several CASSY devices and software, and files can also be saved to and loaded from a WebDAV server.

### Does CASSY App have ads?

No, CASSY App does not contain advertisements. It is a free application designed for educational and scientific purposes without any ad interruptions.

### Is CASSY App suitable for beginners?

Yes, CASSY App includes numerous measurement examples to help users get started. The straightforward connection process and intuitive interface make it accessible for those new to scientific measurement.

### What devices can I use CASSY App on?

CASSY App is available for Apple devices, specifically iPhones, iPads, and iPod touches. It requires iOS 4.3 or later and is rated for ages 4 and up.

## Version history (last 5 releases)

### 2.0.0 — 2026-05-18

Introducing the new CASSY App: intuitive user interface. Modern design. Connect up to four devices to a single CASSY at the same time. Compare multiple measurements.

### 1.19 — 2022-08-18

Saving and sharing experiments is now even easier and the evaluations are easier to find via a new button. Opening experiments from other apps now works reliably.

### 1.18 — 2021-08-13

We have fixed bugs and simplified the calibration of measured variables (correction).

### 1.17.1 — 2021-05-28

The CASSY App now supports the pH Adapter M (524 452) and the Relay M (524 446).

### 1.17 — 2021-05-17

The CASSY App now supports the pH Adapter M (524 452) and the Relay M (524 446).

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## Related topics

[cassie](https://appshunter.io/ios/topics/cassie) · [didactic](https://appshunter.io/ios/topics/didactic)

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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 2026-06-03.*