How it works

From your first race
to the finish line.

01
Step 01

Add your events

Start with your A-race — a half marathon, triathlon, or marathon. Add B and C events too. Fastarun pins them to your calendar and counts down.

9:41
Events
21.1km
Valencia Half Marathon
May 10 · 1:35:00
18
days
Sprint
Banyoles Triathlon
Jun 28
66
days
42.2km
Barcelona Marathon
Oct 18 · 3:15:00
178
days
02
Step 02

Plan your weeks

Build each week in the planner. Add workouts day by day with distances and session descriptions. The volume chart tracks your build across the season.

9:41
Apr 20–26
52km run
M
8k
STR
T
Rest
W
12k
1.6k
T
10k
F
50k
S
22k
S
YOG
03
Step 03

Train and track

Connect Strava and your real activities link automatically. Check off sessions, see planned vs actual, and watch your weekly completion rate climb.

9:41
Wednesday, 22 April
Good morning
Next event
Valencia HM
May 10 · 21.1km · 1:35:00
18
days
Run
52km
Swim
2.8km
Time
8h
Today
RUNTEMPO
Tempo run
12km · 68min
SWIMEASY
Swim
1.6km · 40min
04
Step 04

Ask your AI coach

Not sure about tomorrow? Ask. Want a full week planned? One prompt. The AI knows your race, your history, and your goals.

9:41
Fastarun AI
Coach · Online
18 days to Valencia. You're in a critical build phase — your tempo sessions are strong. Keep the long run conservative Saturday.
Am I on track for my 1:35 goal?
Yes — your LT1 pace has improved 8s/km in 6 weeks. Nail Saturday's 22km and you're there.
Ask your coach…