Yes, nothing too highly specced is needed, but the 3G one might be better. Not that it needs 3G, but only those have the GPS chip built in.
I have a WiFi only iPad mini, as I use my work phone as a hotspot when needed. However, I've always had to use a Bluetooth GPS source with it (currently a Garmin GLO). However, this maybe causing some issues with the PilotAware, which Lee is investigating.
The GLO supplies location services to the iPad via Bluetooth , the iPad to PilotAware via WiFi, and the PilotAware to SkyDemon (which is on the iPad) via WiFi using the FLARM setting. Why SkyDemon can't use location services directly from the iPad location (provided either internally or via Bluetooth) & just take other traffic from PilotAware, God knows - but this is probably a question for Tim Dawson, not Lee.
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Bob,
I'm using an iPad mini. It is just the 16GB version and it is a older version. So any new ones wil be ok.
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