Every helmet
has a name on it.
Locker is the equipment, gear, and check-in/check-out engine of SidelineOS. Built after a single season where the founder watched $4,800 in helmets walk out the door of a 1,340-athlete program. Phone-based. Athlete-tied. Audit-trailed.
Today · Issuance Log
142 ITEMS OUT · 0 MISSING · ALL AUDITEDEquipment is where
programs hemorrhage cash.
Helmets walk away.
One NYF season. Eleven missing helmets. Three orphan shoulder pads. No way to know who had what. The replacement bill came out of program reserves — money that should have gone to scholarships.
The spreadsheet doesn't scale.
Pre-season check-out: an equipment manager and a spreadsheet, by name, by helmet number, by hand. By week three, the spreadsheet is out of date. By week six, nobody trusts it. By week ten, the audit is impossible.
"Whose helmet was this?"
End-of-season returns: a pile of unmarked helmets. No record of who had #H-0247. No way to charge the family that didn't return it. The program eats the cost, every season, forever.
What Locker does.
Check in. Check out.
From the table.
The equipment manager doesn't need a laptop, a printer, or a scanner. They need a phone. Locker is built around the table where gear actually changes hands — fast, mobile, accurate.
- Issue gear in under 12 seconds per athlete
- Scan a tag or type a number — either works
- Look up athlete by name, team, or number
- Works offline at the field — syncs when back on wifi
Every item
has a name on it.
Locker doesn't track items. It tracks the relationship between an item and an athlete. When a helmet leaves the table, the system knows whose helmet it is, who's responsible for returning it, and what it costs to replace.
- One record per athlete shows all items they're holding
- Item history follows the item across athletes and seasons
- Replacement cost auto-attached to each item
- Pulls athlete data live from Roster — no duplicate entry
Every transaction.
Forever.
When a parent disputes a charge in March, the equipment manager doesn't need to remember October. Locker has the timestamp, the equipment manager, and the athlete signature on every issue and return — all of it queryable, exportable, defensible.
- Every check-in and check-out timestamped to the second
- Equipment manager attribution on every transaction
- Athlete or parent acknowledgment captured at issue
- Export for end-of-season audit, board review, or legal
Six modules. One operating system.
SidelineOS is modular. Start with what you need. Add the rest as we ship them. Your account scales, your data stays.
Locker
Track every piece of gear, tie it to an athlete, run check-in/check-out from your phone.
Roster
Registration, weight-tier eligibility, division placement, full athlete history across seasons.
Schedule
Field allocation, practice blocking, tournament brackets, and game-day scheduling.
Score
Field-number login, scoreboard sync, whistle and horn audio, halftime countdown, crash recovery.
Comms
Targeted messaging by team, division, or full league. Built for the operator tired of GroupMe sprawl.
Field
Field availability, conflict detection, weather cancellation flow, and facility partnership management.
Built in the field.
Not the office.
SidelineOS isn't a thesis. It's a tool I needed. I run a 1,340-athlete program across six divisions. Every module on this page started as a workflow I had to solve before Saturday. The fact that other operators need the same thing is the business — but the design pressure came from the field, not a focus group.
Numbers a competitor can't fake.
SidelineOS runs daily inside an active program. Here's what that program looks like.
Every helmet, accounted for.
Start free. Locker is live in production at NYF — 3,842 items tracked, $268K equipment value, zero items missing this season.