The Apexes comes with a remote control but they do not connect to any other external devices. The only Pulsar thermals that connect to a phone/tablet via wifi are the Trail rifle scopes and the Helion monoculars.
The only difference in the Apexes and the Trails are that the Trails have:
1) Internal video recording
2) Rechargeable/removable battery pack (6-8 hour battery life)
3) Wifi to connect to your phone/tablet
Otherwise the specs, magnification and image quality is identical when comparing the Trail XQ50 and the Apex XQ50. Same goes for the XQ38's in both models.
Hope that helps.
Night Vision, Thermal & Accessories
Pulsar, Sightmark, FLIR/Armasight, Trijicon & More