If you have an Apple Watch, you can use the Workout App or NRC App and sync it to Strava at a later date using the HealthFit App.
Disclaimer: I really shouldn't respond to posts after drinking red wine.
Is anyone else using the 5K Parkrunner result app?
It's pretty good and the challenges add some fun to the Parkruns.
Currently trying to do the Tourist challenge (do 20 different Parkruns).