The Bluetooth/Torque app is the cheapest way to "ACURATELY" monitor what your engine is doing in absence of separate physical gauges. The better BT adapters can monitor at a faster RATE, which may allow for the monitoring of MORE items. The AEROFORCE and cheap BT adapters BOTH read the PCM through the OBDII connection so are REPORTING the SAME information!
I don't get how people bash the BT adapter/app (Torque Pro) route when it is the same exact thing?
I don't vouch for any other app...
I have done a run with my HPT monitoring and recording and then removed it and did the same run with BT/Torque and it was the same. The trick is to not load the app with too many items to monitor, but three pages loaded with all the pertinent gauges and recording was fine. If you load too many all it will do is SLOW down the data flow, not CHANGE IT.
I have been using torque pro since it was first out and it is probably one of the best written apps hands down!