HamRS was just released for Mac, iOS, windows, ubuntu, and Linux. It was designed for POTA and field day use, but he is working to add general logbooks as well. Callsign dated pulled from QRZ when you enter it, and cloud syncing of logbooks between devices is coming. By far the best POTA log book if you don't wanna pay for MacLoggerDX. You do log rig connection. The website is hamrs.app. The picture is what the POTA logbook looks like on a MacBook Pro.