Archived App (Last seen on 12 May 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
This app is only functional in conjunction with the drawbar scale STB 150B from AT SensoTec, which can be purchased here: https://atsensotec-shop.de/
We have developed this digital drawbar scale so you can monitor the current towball weight of your trailer or caravan while loading it.
This app makes it possible to comfortably read the current towball weight on your iPhone.
In order to measure the towball weight the drawbar scale has to be attached into the towball coupling. Sensors calculate the force which acts on the towball coupling. This allows the towball weight to be monitored while loading the trailer or towing vehicle.
APP FUNCTIONS AND FEATURES
Safety
• Reliable indication of the towball weight before every trip
• Reduction of accident risks by maintaining optimal towball weight
• Compliance of legal requirements
Quick and easy loading
• Towball shaped shaft for safe support
• Ongoing measurements during the entire loading process
• No need for multiple weight checks during loading
• Reduces the need of load rearrangements because of wrong towball weight
Precise measurements
• Innovative sensor measurement system
• Digital readout
• Robust long-lasting construction (no wear of spring tension)
With our products you obtain a reliable indication of the towball weight to improve vehicle safety, thereby also saving on repeated weight checks and avoiding unneccessary rearrangement of loads.
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What's New in STB150B
1.3.1
March 10, 2020
We have solved some stability issues for the connection between scale and app.
