A grappling companion
One line after class. A log that remembers everything else.
Built for hobbyist white and blue belts training two to four times a week — busy, and not always sure they're improving.
got swept from closed guard twice, hit one armbar
The offer
From a rough note to a structured log.
You write the quick note
Right off the mat, drop a rough line — ‘got swept from closed guard twice, hit one armbar.’ No structure required.
Corner tags the positions
That line becomes a structured training log, with every position it mentions tagged automatically.
Ask what to do about it
Follow up with technique questions about anything in the log and get a straight answer back.
Know what to drill next
Corner suggests what to drill next, based on what actually happened in class — not a generic plan.
For the hobbyist who trains, not the pro who posts.
An adult white or blue belt training two to four times a week at a commercial academy, anywhere in the world. Busy. Motivated. Using a notes app, or nothing, to remember what happened on the mat.
How it works
Logging starts as a nudge after class. It becomes part of leaving the mat.
Step 1
The nudge
An email on your usual training evenings: ‘Log today’s class.’
Step 2
The quick note
Type one rough line about what happened. No structure required.
Step 3
The build
Corner turns it into a structured log and tags the positions.
Step 4
The review
See your week, your path to the next belt, and what to drill.
Linked to your team and the events near you.
Every log sits inside your team, next to the open mats and competitions happening near wherever you train.
Your team, in one place
Events happening near you
Sample
See a sample log.
Built by Corner from one Member's own quick note — the moment a first log gets saved.
“got swept from closed guard twice, hit one armbar”
Drill next
Closed guard retention under pressure
Price
$5 a month.
One plan, per Member, billed monthly through hosted checkout. No free tier, no yearly plan, no trial. Sold from the site behind a sign-in.