App for walking not running 10k

[Boscoforever]

I hate running, but am doing a 10k walk for charity later this month and would like to build on that.
Obviously I can walk, and work out distances. But is there an app like couch to 5k for walking? I can’t seem to find one. Ta

One You Active 10 Walking Tracker from Public Health England.

Thanks. Found one on BHF website too, just need to get walking now!