P 3 Standard. The app disconnected, still had RC control. I messaged Litchi on FB and here is their response.
Hi,
The DJI dev kit support for the p3 standard is not as good as it is for other drones (mostly because it uses wifi rather than lightbridge). For example you will notice the video signal (the one on the right) sometimes going from 100 to 33% in one split second then back to 100% (you can barely notice the change). This is something we cannot explain either, but it is raw data we get from the SDK. Maybe DJI Go only shows an average over time rather than the current value, we don't know as we can't see their code and they don't make this clear. The fact you use an antenna mod it may also affect this.
That being said, the iphone 6s should give you relatively good results normally, assuming no background apps, but the ipad
air 2 is definitely more powerful.
I believe you can reload the firmare using the DJI assistant but I don't think it is compatible with the p3s unfortunately.