Hi. I bought two Olivia cameras from
https://www.time2technology.com/
You download the Clan app (free) to your phone. There are three alarms available - motion detection, motion tracking and sound detection. You can adjust the camera angle via your phone, take a screenshot and record. Cloud storage is optional but there is a charge. I chose not to use cloud storage and any screenshots or recordings are saved to my phone. Once you've bought the camera, there is no further charge unless you want to use cloud storage. The camera does have to be plugged into the mains all the time. I bought the cameras to keep an eye on mum at night (so I didn't have to leap out of bed every time I heard a thump) and during the day as I was still working then, albeit at home.