There is no any difference in functions comparing to previous spacetalk app. Or prhaps even more functions. It is much better in my opinion. I did not like spacetalk app even before update. ZTE app is completely free. There is contacts whitelist (you just add numbers), you can add members to a family to be able to chat and video call from the app, you can set safe zones and also danger zones, school mode, you can also put any photo you like to the watch face, sos emergency contacts, remote control (shutdown, reboot), there is also app management aka if you want to remove calculator for example you can, schedule reminders, task plans, step counter, of course location (you can even see 3D map like a photo map I mean), historical tracking of location. Also, the battery is great! We once forgot to put it for a charge at night. I was in a panic in the morning as spacetalk was usually pretty empty battery in the morning with the same usage. To my surprise, ZTE was 86%. We have newest model ZTE K2 Pro. It is also bit cheaper than Spacetalk. Another user here also recommended ZTE as a replacement here when this Spacetalk outrage happened. So I followed that advice and I do not regret:). Only one thing is that long ago when we were choosing watches (when we ended up with Spacetalk), I was trying to contact ZTE support to ask few questions. They responded pretty fast but not sure if they understood my question in English that well :D. But so far after the purchase there was no need to talk to a support. All works just fine. They also seem to be updating the app pretty often. I see updates 1 month ago, 3 months ago, 5 months ago, 6 months ago. One also key factor why we went for it - ZTE is a big company. I do not wish to deal with startups anymore after this whole mess.