Beatgridding a transition track?

I have a track that goes from 85 BPM to 98 bpm
How can I beatgrid this tempo change on the iPhone?

Hi guys,

Having several Beatgrid sections to adapt to different BPM segments of a track is on our request list.

Thank you for sharing your feedback.

Lukas E.

yes, please. Every other DJ software offers that option, btw

Also, not only the change in tempo but also defining a new downbeat as in a lot of contemporary remixes they shift by a quarter or half a bar and then the 1 is off.