I have been using the FOBO Bike 2 for a couple of years and like them. They do not support rubber valve stems so I replaced mine with 90 degree metal ones. They do include a lockable installation feature but I have not used them. They are lightweight and the battery is easily replaceable.
The smartphone app is ok, easy to use once you get it set up. The app shows temperature as well as pressure. The display will come on before departure but it sometimes takes a minute or two. The measurement is precise as it displays in tenths of a PSI but it seems to be about 1 to 1.5 psi high compared to my didgital guage.