Verifying USB-C voltage

Question

I have heard about some USB-C chargers frying tablets, phones, etc. If I ordered a generic charger online for price reasons, how can I can verify its voltage before using it with my Android devices?

— Susan | Sources

Answer

There exists an Android app for this purpose called "USBCheck":
https://play.google.com/store/apps/details?id=jacob.uk.com.usbcheck

Unfortunately it is currently only supporting Nexus 5X and Nexus 6P.

— Androbin | Sources

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