It will only take 5 min. for an Indy shop to hook it up and pull the code. Maybe call around and find one that will help you out?
The app lets you read and clear any error codes. If the error persists the code will come back until you fix it. I use an inexpensive wi-fi OBDii adapter with my iPhone 6, but I got mine a while back so not sure what the difference is between it and the official one. YMMV.
ieGeek WiFi Wireless OBD-II Mini ELM327 OBD2 Auto Car Diagnostic Scanner Tool Adapter Read...
https://www.amazon.com/dp/B00B3K2X4M...sms_api_aG6Axb...