So for most things the changes shown on a timescale less than 1h are done by means interpolation performed by the app on my device post downloading the data from the source?
And also every change shown on a timescale less than 10 min is done by interpolation?
Yup. Pretty all data in Flowx is the best that we can get. The only improvement I can make it to calculate optical flow and include this - this is quite diffucult.