Good point. I always found the Strava app to be unreliable. Same experience some friends reported. Too many GPS sync errors and other glitches. It's not a great app for realtime logging.

I used Cyclemeter on my iPhone and Wahoo Fitness for iPhone and Android. Much more reliable, less battery drain.

I've had a bike computer since January but still use my phone with Wahoo Fitness as a backup, or to compare data.

But I doubt I'd ever use the Strava app to log a ride unless they returned to supporting sensors and improved reliability. Unlikely to be a priority with so many "serious" riders using bike computers now. You can get reliable basic GPS computers for under $100 now.