@latency: GPX export and then import from the sports tracker website works without problem, you can also use it to compare the filtered and unfiltered files

Regarding interval training, I usually prefer to use the manual laps, it is much more flexible. For the next version, we will focus on offline maps, altitude (in a reliable way...), training import, filter configuration and offline filter. Pulse may come later. The other features, while nice to have, have a lower priority. MeeRun tries to focus on accuracy, stability and usability. Marketing usually focus on number of features, though