If you install the software on android you can change the language to english with the gear icon, first item, then the second item.
And it took me some time to figure out that the error message "FAILED!" when adding a device had something to do with my phone running android 9. On a friends tablet with android 8 it just works.
With the app I am able to press "Pulse" and "X+" and "Y-", for example, at the same time, which is nice
