Getting started
Onboarding takes about a minute: your name and age, how fit you are right now (a recent race time, or a self-rated level), how much you're running, which days you can train, and your goal. Tap Build my plan and RunFast generates the whole plan, week by week, with a target pace range for every session.
Frequently asked
Does RunFast track my runs with GPS?
No. RunFast plans and logs your training; it doesn't record it. Use your watch or whichever tracking app you like, then complete the planned session from Apple Health with one tap — or type in the distance and time yourself.
Can I use miles instead of kilometres?
Yes. RunFast picks kilometres or miles from your iPhone's region the first time you open it, so if you're in the US you'll see miles and min/mile without doing anything. To change it, go to the Profile tab → Units. Everything switches straight away — including plans you've already built, which don't need rebuilding.
One deliberate exception: track repetitions stay in metres in both settings, so a session reads 6 × 800 m either way. Running tracks are 400 m the world over, and that's how the workout is meant to be run.
Where do the paces come from?
From your current fitness, using Jack Daniels' VDOT model. RunFast estimates your VDOT from a recent race time (or your self-rated level), then derives Easy, Marathon, Threshold, Interval and Repetition paces from it. You can see all five on the Profile tab.
Why did RunFast offer to complete a run I didn't tell it about?
If you allow Health access and you've recorded a run today that matches the day's planned session, RunFast offers to fill it in for you. Tap Not now and that particular run is never offered again.
Do I have to give it access to Apple Health?
No. Everything works without it — you'd just log runs by hand. Access is read-only and RunFast never writes anything back to Health. You can change it in Settings → Health → Data Access & Devices → RunFast.
My plan doesn't suit me any more. Can I start again?
Yes. Profile tab → Create a new plan builds a fresh plan; the old one is deactivated. Reset everything deletes your profile and all plans and takes you back to onboarding.
Can I back up or move a plan?
Yes. Profile tab → Export writes the plan to a file you can keep or send on, and Import reads one back in. An imported plan becomes your active plan.
What does a deload week mean?
Every fourth week, RunFast cuts your volume by about a quarter so your body can absorb the training. It's marked with a Deload badge on the Today and Plan screens. It's deliberate — don't try to make the mileage up.
Which devices does it need?
An iPhone running iOS 17 or later.
Still stuck, or found a bug?
Email marco@mrico.eu with your iOS version
and what you were doing. Bug reports and feature requests are both welcome.
Privacy
RunFast collects nothing and has no network access at all. See the privacy policy.