Im a fan of this company, I have 5 cameras in 3 different models of their WiFi cameras but not their solar or battery powered so I dont know how good they are.
No subscription fee, you can subscribe if you want and its pricey, but no reason too at least for me, the SD card in the camera is accessed by the app and you can do a million different things with recordings, alerts, snap shots, download video, photos, fast forward, rewind.
It will record in a loop, once the SD card starts filling, it will record over the oldest first. I couldn't even guess a time frame because I never needed to go so far back in time, I assume the loop would be around 2 weeks time, it really depends on how you have the camera set up, with the SD card you set it up to record when the camera detects motion. SO the loop would depend on how much recording you are doing and the size of the SD card you buy for it. I hate talking about loop time frame, you will never run out of room.
I can say, EZVIZ is a HIKVision company, which is the worlds largest video surveillance manufacturer. The app works great ect ect, camera firmware updates seem to add features over the years too. HikVision monitors commercial buildings around the world, the parent company is the real deal.
Their products are above the "toy" level common with a lot of the consumer cameras.
This is a screen shot from the app on my phone, we live in a really safe area, I do this stuff for fun, ( read my BITOG screen name) I caught this criminal on my front lawn with the older model EZVIZ C3WN. Its an ok camera, not battery though, If you can figure a power source I highly recommend their newer model (I have one of those too) which is the C3W Pro. It has an awesome detection control to only decide humans, that camera didnt pick this criminal up, I in the settings I could have had that active too. It will also record night vision in color, they also have one more camera with a dual lens that does this even better, I installed 3 of those cameras at my sons home.
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www.ezviz.com