Well I am actually shocked of how close my BloomSky reads to my VP2. Today on the hour for VP2 and as close a time as recorded on the Bloomsky (which varies but all within 5 minutes of the hour). VP2 temp at 1 decimal and Bloomsky at 2 decimal, and pressure VP2 at 2 decimal and Bloomsky 0 decimal:
1:00 am VP2 temp 19.8°C Bloomsky 18.87°C and VP2 pressure 1019.14 MB with Bloomsky 1019
2:00 am VP2 18.6°C and Bloomsky 18.47°C and VP2 1019.31 and Bloomsky 1019
3:00 am 17.4 vs 17.51 and 1018.63 vs 1020
4:00 am 18.5 vs 18.49 and 1018.09 vs 1020
5:00 am 20.7 vs 20.39 and 1017.78 vs 1018
6:00 am 21.0 vs 20.72 and 1017.71 vs 1018
7:00 am 21.4 vs 21.42 and 1017.34 vs 1018
8:00 am 23.3 vs 23.13 and 1016.77 vs 1017
9:00 am 24.9 vs 24.82 and 1016.06 vs 1017
10:00 am 26.4 vs 26.47 and 1015.45 vs 1016
11:00 am 28.4 vs 28.36 and 1014.63 vs 1014
12: noon 29.7 vs 29.73 and 1013.79 vs 1013
1:00 pm 30.5 vs 30.59 and 1013.1 vs 1013
and it should be noted that during that time the Bloomsky is fully exposed to the sun and at about 4 feet above the ground in a flower garden. Later on it will be in the shadow of tree.
Mine is a replacement device and if I recall correctly the original device was way out in pressure comparison so either huge improvement in the device itself or in the software at Bloomsky, or both.
https://map.bloomsky.com/weather-stations/gqBxp6apnJSnoJimPaul