Foil.Run

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zarb
zarb
NSW
715 posts
NSW, 715 posts
15 Nov 2026 1:21pm
Hi all!

I know a few of you on here already use the tool, but if you haven't seen it yet, check out Foil.Run.
foil.run/

Blurb from Wren, who built the whole thing:

"Everyone’s got an opinion - now you’ve got data. As a scientist and engineer, I wanted to rethink how I tracked my foiling, starting with what I actually wanted to learn.

How do I spend more time surfing downwind and less time grinding back up? How do I carve harder and link turns more smoothly? Which gear actually helps?
Then I worked backward to the algorithms, data, and tools I’d need. If I built a score or competition around those measurements, would chasing it actually make me a better rider?

This became an app called Foil Run. I wanted:

(1) Gear, conditions, and goals logged for every session. So now I just ramble at my watch when I start and finish, and foil-specific AI structures and records it for me.

(2) Custom algorithms for the things I actually want to improve: upwind VMG and maneuver performance, my ratio of downwind time to upwind grind, how hard I carve, how smoothly I link turns. I’m also testing competitions around those measurements, so you can compete with yourself, your crew, or everyone.

(3) Enough consistently tagged data to compare gear across sessions and conditions. Everyone’s got a hot take. I would like a sample size!

I’m still evolving the features and algos every day. What do you want to improve, measure, or compete with your friends on? Send me your wish list - in the app, by email, or here on IG.
Thank you SO much to my infinitely patient and creative early testers!

It’s free on iOS, Android, Apple Watch and Garmin for anyone who wants to try it: foil.run"
AnyBoard
AnyBoard
NSW
529 posts
NSW, 529 posts
15 Nov 2026 3:23pm
zarb said..
Hi all!

I know a few of you on here already use the tool, but if you haven't seen it yet, check out Foil.Run.
foil.run/

Blurb from Wren, who built the whole thing:

"Everyone’s got an opinion - now you’ve got data. As a scientist and engineer, I wanted to rethink how I tracked my foiling, starting with what I actually wanted to learn.

How do I spend more time surfing downwind and less time grinding back up? How do I carve harder and link turns more smoothly? Which gear actually helps?
Then I worked backward to the algorithms, data, and tools I’d need. If I built a score or competition around those measurements, would chasing it actually make me a better rider?

This became an app called Foil Run. I wanted:

(1) Gear, conditions, and goals logged for every session. So now I just ramble at my watch when I start and finish, and foil-specific AI structures and records it for me.

(2) Custom algorithms for the things I actually want to improve: upwind VMG and maneuver performance, my ratio of downwind time to upwind grind, how hard I carve, how smoothly I link turns. I’m also testing competitions around those measurements, so you can compete with yourself, your crew, or everyone.

(3) Enough consistently tagged data to compare gear across sessions and conditions. Everyone’s got a hot take. I would like a sample size!

I’m still evolving the features and algos every day. What do you want to improve, measure, or compete with your friends on? Send me your wish list - in the app, by email, or here on IG.
Thank you SO much to my infinitely patient and creative early testers!

It’s free on iOS, Android, Apple Watch and Garmin for anyone who wants to try it: foil.run"

It an amazing effort by Wren.


Its helped me understand some things i wouldn't have otherwise.
🙏🙏🙏🙏
hilly
hilly
WA
8312 posts
WA, 8312 posts
15 Nov 2026 1:06pm
Does it sync to Strava automatically?
wrench
wrench
1 posts
1 posts
15 Nov 2026 9:16pm
hilly said..
Does it sync to Strava automatically?


Yep, Foil Run has Strava sync! Strava caps us at 10 connected riders for now, and I’ve applied to raise that limit. It could take days or weeks, but I’ll post here as soon as it’s approved.
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