Dear developers of Notion (Mobile),
to go with the time and allow more sophisticated notation I'd highly recommend to include in a future update
the option of FEATHERED BEAMS in order to indicate an Accelerando or Ritardando in small phrases of individual voices.
i.e. a pulse leading from eighth notes to 32d's within the time of a half note.
That would be very helpful! (Check how Dorico is using it) You can do, too;-P
Thank you and all the best,
Alex