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If you have a non GM vehicle you can get one of the $5-$10 ones and it might work. I bought a $5 one and it didn't work with my truck, but I gave it to my cousin and it works on his Nissans.
Carloop allows you to read (like the OBD-II dongles) but also, lets you write messages to your vehicle's CAN bus. Might not be your cup of tea, but it is actually underpriced given commercial tools in the market that go for $500+
Carloop is for folks that are interested in going beyond just reading what the OBD-II dongles + Torque app can provide. For example, being able to roll up your windows automagically after your car goes above 40 mph.
Carloop can sniff CAN messages and can sends CAN messages into the Controller Area Network (CAN) of a car. This is how the Engine Control Module communicates with the Transmission Control Module, ABS module, Body Control Module, etc.
In my example, it would read the broadcasted vehicle speed (probably sent out by ABS module) and then upon crossing the 40 mph threshold, Carloop would send the corresponding CAN message that rolls windows up.
Lots of research to figure out which CAN message for vehicle speed and windows rolling up, but not impossible.