Hi brutyke , I've no idea about the app as I can't access it, being outside the UK. However there are post-run stretches here: nhs.uk/live-well/exercise/r...
The link, plus lots of other useful information, is included in the How to Run C25K guide: healthunlocked.com/couchto5...
I think these must be the old ones from the NHS website Couchto5K section, not the (android) app - it's the same bloke as in Cmoi's link above anyway, and I've bookmarked a couple so I'll try those instead.
This is link to ones I use, and which I think I must have found via app when I started out. But I'm not sure if link is working properly, so maybe there is an issue with original video
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