Amazon.com.au:Customer reviews: Igreeman Video Doorbell WiFi IP Security Camera, Wireless Powered 720P Realtime Smart Watchdog Surveillance System w/Night Vision, Free Cloud Service and Heat-Base PIR Motion Detection Push Alarm
The hardware seems to work quite well. The limitation being how strong the wifi signal is between doorbell and the home router. The battery may be being overcharged as I measured 5.3 volts on a 3.7 volt battery. 4.3 volts is the correct maximum. Good battery life is a key aspect of acceptability for these devices. What does need work is the software. Most IP cameras use a mask to exclude sections of the image from detecting motion to allow for trees etc. moving in the wind. This feature needs to be added. I have had to disable motion detection to avoid incessant notifications. The IP address of the camera needs to be shown in the Settings page. The battery charge icon seems out of calibration with the battery's actual charge. A percent charge display added to the Settings page would be appropriate.