Well, here is a new twist. My Bloom Sky data on both iOS and WU is now usually hours old. Just got a WU email too saying Bloom Sky has not updated in more than 2 hours. As far as I know, this is the first time for hours delayed data since I installed mid January.
For several days, I was able to reasonably easily collect the data for my spreadsheet by looking at the iOS App barometer reading and the readings on the Bloom Sky and RainWise Weather Underground pages.
I sent my barometer observations to Bloom Sky tech support with a link to the thread here, by email (no reply, but it has been less than a day).
Now, it is more difficult to fill in the spread sheet because for long intervals, the iOS App (when I finally get it to update) reports hours old data. Also, the RainWise WU page is updating within minutes, but my BloomSky WU page also now lags.
For example, at 11:04 local (est), both my iOS and Bloom Sky WU pages report 8:56 am, while RainWise was up to date at 11:04.
The problem is that the Bloom Sky iOS barometer value does not appear to log anywhere (it is different from the "other" different (possibly "absolute") barometer reading logged at WU and on the Bloom Sky data portal). So, now I have to write down the old iOS data and go back to find the corresponding old data in the WU logs. It is still doable, but one more step and another pain.
Also, as we get some warmer temps and I can fill in more of the temperature range, I can take some data for that range. Now, I have to remember to go back and get it two hours later. This is all manual recording, so I have not been able to auto-log, say every half hour or so, which would be an infinitely better way to make the chart.
The new hours old data could be caused by someone looking at the problem, or it could be just coincidence. It is not WU, because the RW data is still updating, and both Bloom Sky sources show the hours delay. It is disturbing none-the-less.