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Yes. I use my 4s without issue, best part is that the dyno/performance meter is seriously accurate for being a cheap app. You can see any codes that come up, the display will show boost, MPH, temps, I mean...everything. Best cheap 'mod' (not even) I have done to the car.
 

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When you get the OBD 2 device, the instructions to install it are on Amazon (another customer who is tech savvy wrote out instructions), follow them to get the device to talk to your phone, download the Dash Command App and it will all jive. I nearly purchased the Innovative OBD 2 wire that plugs into the iPhone for like, $200 bucks and this works just as well for a fraction of the price.
 

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Yes. I use my 4s without issue, best part is that the dyno/performance meter is seriously accurate for being a cheap app. You can see any codes that come up, the display will show boost, MPH, temps, I mean...everything. Best cheap 'mod' (not even) I have done to the car.
I had a wifi ELM327 and DashCommand, but all I got for boost was a BOOST CALC value, that looked reasonable, but read the same on my ST as an SES, so I figure that couldn't be right. This was before the DashCommand update that added 2014 Fords to its database. Did you need to buy that to get accurate boost, or did I miss something? Thanks!
 

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Ive used an EL327 with bluetooth and an old android phone. Only problem is I plugged it into USB to charge and it ran my battery down overnight and I am not sure how to remedy this :(.
 
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