You need a specialised device. I couldn't find any software which could read this from an Android phone or Linux machine.
Picked up a Treedix while they were on sale. Slowly going through my Big Box Of Cables™. Some of the high-spec cables I bought are duff.
I can recommend getting a Treedix USB tester - it will show you if your cables are up to spec.
I agree with all this. The thing which caused me to uninstall was suddenly being pushed lots of abusive message with disturbing contents.
When I complained about it, Matrix told me that my public complaints were hurting the ecosystem and I should be quiet.
Could you please share a link to the beta? I can't find it in the telegram chat. Thanks 😃
This is the one I got - https://shkspr.mobi/blog/2025/06/gadget-review-treedix-usb-cable-tester/
The LED ones are OK. They'll tell you continuity. But you won't get speed or PD information from them.