While I have long been a fan of the free Check Engine code scanning offered by AdvancePepZone, CEL's seem to be illuminating at short enough intervals lately that I'd like to have a scanner at home. Is there a GRM-preferred adapter and app for the iPhone?
The GoPoint BT1/1A appears to be the only Bluetooth adapter available for iOS. It's got the job done for me in the past, though the software that comes with it can be a little clunky-- suffers mostly from being oversimplified.
Otherwise, you are looking at a wifi adapter and probably Rev
PS. The GoPoint adapter works great with Harry's Lap Timer
Any cheap BT-OBD adapter will do. I can't recommend any iOS software but there are plenty of options.
I've got an ELM-327 bluetooth code reader which was about $15, but I also have a jailbroken iPhone and the bluetooth stack (roqyBT OBD) that allows you to use it with the iPhone. Or at least I could before I upgraded to iOS7, and they haven't gotten the jailbreak software for the stack updated for iOS7 yet. I loaded up new one- TryOBD- but have been lazy and not tried it out yet. I used it paired with the free EngineLink app to read and clear codes, and it will also read and display basic dash data as well.
Wait you need to jailbreak iPhones to use them with BT code readers?
Is there anything they don't lock you out of doing?
Yup, the GoPoint is the only device I know of that you don't have to jailbreak the phone to use.
It's all for your protection, and Apple's licensing bottom line. 
At least the really cheap ones you do at last count need to jailbreak them, I believe (as Karacticus implied) because Apple didn't want to pay to include the necessary BlueTooth stacks in the iPhone to link up with them. The only ones I KNOW will work with a non-jailbroken phone are WiFi and not Bluetooth.
If I think about it this afternoon I'll test out the new OBD utility and see if it works with the ELM-327 and EngineLink. The new iOS7 jailbreak is dead simple and painless- you could easily do it and load up the BT stack and never know otherwise that the device was jailbroken if you didn't want to change anything else.
Innovate OT-2. It's Wi-Fi, not Bluetooth. Nor is it $15 on eBay. But it works well and you don't need to screw around with jailbreaking. It's what we use at Flyin' Miata.
I got one of the laptop scan tools a year ago and love it:
http://www.scantool.net/scan-tools/pc-based/obdlink-sx.html
It gives me a bunch of parameters to monitor in real-time, does data logging, etc. For $38 (they were offering a discount at the time), it was definitely worth it. It's a hassle to bring the laptop out for every code, but I have a small handheld scanner for a quick read.
Their free software has given me a lot of flexibility, you can even create your own dashboard with the parameters you want to see.
PLX Kiwi WiFi. load one of the apps on your phone, if you can work out a landscape-orientation mount for said phone high up on the dash (not obstructing much of your view out the windshield or any gauges obviously, but not hidden behind the wheel or stuck down in a cupholder either) and get a charge cable up to your phone (constantly running the app is a HUGE battery-killer, I swear it depletes the battery almost as fast as a car charger can charge it), you'll not only have a code reader, but also be able to monitor a lot of other functions that your car might not/probably doesn't have gauges for (fuel flow rate is the first to jump out at me, since that's what I use most often on my PLX/Dashcommand setup in the Mini) as well as serving as an awesome trip computer
Played around with both TryOBD and the updated version of the software I used to use, roqyBT7/roqyOBD7- and couldn't get either to work right with EngineLink in iOS7. Need to fiddle more with roqy though, since I was sitting in my driveway within reach of my home WiFi network and the BT stack utilities basically pass the BT data over a fake network, so being on the WiFi network messes with it.
I had a dongle sitting somewhere around here and Torque for Android. Is it not available fo iStuff?
N Sperlo wrote: I had a dongle sitting somewhere around here and Torque for Android. Is it not available fo iStuff?
Yes and no. They don't to my knowledge make any wired ones yet (nobody has paid the fee for it), and pretty much only WiFi-based ones will work with iOS devices because Apple didn't include the BlueTooth stack necessary for the OBD interfaces (likely because THEY didn't want to pay for the licensing on it...). So the WiFi ones will work just fine, but they're also somewhat more pricy than the BT ones.
I'm using a EML-327 and dashXL for ios. I think the total price was around $30.
pappatho wrote: I'm using a EML-327 and dashXL for ios. I think the total price was around $30.
Sounds about right- important to note that you have to be using a WiFi ELM-327 and not a BlueTooth one if it's not jailbroken. A WiFi ELM is about $20, and DashCommand is $9.99 in the App Store.
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