Question about OBD adapters

I've been reading some of the threads here on those who dig deep into getting various readouts form their Prius, and am curious about it, wanting to learn more.

I know Torque Pro is a common, app that's used, but I have a iPhone (sorry, but I prefer Apples to Oranges) and just found an app for the iPhone called Engine Link that seems to offer the same things. I've also figured out that I will need to get an OBD adapter. My question is: Can I just get any ol' OBD adapter and use it with the Prius, or will I need one that is proprietary to the Prius, and the Apple app. I see OBD adapters sold on e-Bay for about five bucks. Seems pretty cheap. I really want to learn about this stuff so any straightforward explanations would be most appreciated. Thanks!

 

According to the listing for Engine Link on the App Store it states that one can also use a "low Energy Bluetooth adapter to connect to your OBD2 engine management / ECU". Can someone "translate" this for me? thanks.

 

I see a lot of these units for sale and am confused. I was thinking of buying this one: Mini ELM327 Wi Fi OBD2 OBDII WiFi Car Diagnostic Interface Scanner for iPhone | eBay but I'm worried that it may not be for a 2014 Prius and may damage the car if plugged in. Can anyone here tell me if this unit is OK? I will be using it with the Engine Link app. Thanks.

 

This is what it looks like, (see below). My concern is if it will ruin anything on the Prius if I plug it in. Mine's a 2014 and not sure if this is the right one.

 

Great! thanks for the quick reply on this. Most appreciated.