RunFast

A periodised plan, not a to-do list

RunFast writes your plan for a 5K, 10K, half or full marathon around the days you can run, with a pace for every session.

Get it on the App Store Free · iPhone with iOS 17 or later
Half marathon plan Goal 1:45:00 · Race on Sun 11 Oct

61days to race

Week 5 of 13121 km logged
Weekly volumePeak 55 km
This week0 of 41 km
10
8
6
17

Your days, not a template

Sessions only go on the days you said you’re free, and the long run prefers the weekend. When a week changes, move a session to another day.

Intervals Build · Week 5

4:40/km

Rep pace · 5 × 1 km, jog 500 m between
Distance10 km
Est. time56 min
Recovery500 m jog

A pace for every session

Worked out from your own fitness: a recent race time, or your usual easy pace. Log the run by hand, or complete it from Apple Health in one tap.

Out sick Since Wed 7 Oct
Time off These days don’t count against you. Your streak pauses, and your plan waits.

A pause button, not a reset

Ill, injured or away? Say roughly how long. Reminders go quiet, and a short break picks up on its own, with nothing to make up.

A coach that reads every run

After a run, the AI coach reads it with your plan and writes you a note. When the effort was higher than planned, it suggests easing off, and you preview the change before it applies.

An optional subscription, monthly or yearly, with the first month free for an Apple Account that hasn't subscribed to it before. The App Store shows the price where you are.

AI Coach · Tempo Run, Tue 6 Oct A hard day on tired legs Effort 8 of 10 on a session meant to feel like 7 says your legs are carrying the last few days.
Suggested change Take it easy for two days From your recent training, your coach suggests easing the next two days, then carrying on as planned.
Written by your AI coach from this run and your plan. It isn’t medical advice.

One tap from Apple Health

Your watch records the run; RunFast finds it and completes the session. It only reads, and writes nothing back.

On your iPhone

No account and no ads. Without the AI Coach, your training never leaves your phone, and any plan exports to a file.

Kilometres or miles

In English, German or Spanish. It follows your iPhone, and the units switch any time without rebuilding the plan.

Straight from the app

RunFast on iPhone, partway through a half marathon plan.

RunFast’s Today screen: an easy run of 10 km, about 41 minutes at 6:19 per km, a Log this run button, and this week’s runs as bars.

Today

The day’s session and its pace

An intervals session in RunFast: five fast reps in its shape, 10 km in about 57 minutes at a rep pace of 4:40 per km, then the warm-up, the five 1 km reps, the 500 m jogs and the cool-down.

The session

Each part of it, and your paces

RunFast offering to complete today’s easy run from Apple Health: 10.3 km in 58 minutes at 5:38 per km, an average heart rate of 151 bpm, recorded by Apple Watch, with Save at the top.

From Apple Health

A recorded run, saved in one tap

RunFast’s Progress screen: 101 km in 12 runs and 10 h 18 min, 10 of 12 planned runs completed, and each week’s runs with their distance, time and pace.

Progress

Every run, week by week

Your plan, in about a minute

Tell it your goal, how fit you are and which days you can run. RunFast is free; the AI Coach is the only thing you can pay for.

Get it on the App Store Free · iPhone with iOS 17 or later