LapBattle — Friend leaderboards for iRacing

Setup once · forget forever

Three things, then drive.

No browser extension, no overlay, no telemetry SDK. The companion reads finished laps from your iRacing session log and posts them. That's it.

01

Download the companion

A 6 MB tray app for Windows 10 / 11. Auto-starts with your PC. Auto-updates from GitHub Releases. No installer popup spam.

LapBattleCompanion.exe · 6.2 MB

02

Connect your account

Sign up at lapbattle.gg, copy your token from Settings, paste it into the companion. One token, one PC, one time.

Token · masked + revocable

03

Drive and compete

Every completed lap is captured — Test, Practice, Qualify, Race. New best laps appear on your friends’ leaderboards instantly. Argue about setups.

Auto · zero clicks

What you get

Built for racers who read timing screens for fun.

Data density without the bloat. Every lap is logged with the context that actually matters when you're arguing about who's faster.

Every session type

Test Drive, open practice, qualifying, and race. Filter what gets uploaded per session type if you want to keep your warm-up laps private.

incl. Test Drive — the killer feature

Real conditions

Air temp. Track temp. Fuel level at lap completion. Setup name if you loaded one. Receipts for every fast lap — and every excuse.

air · track · fuel · setup

Friend-only

No public profile, no global leaderboards, no ranked drama. Only accepted friends see your laps. Your group, your rules.

invite-only · always

Instant best laps

Cross the line, the row updates. Best lap per track + car combo is computed live — no overnight batch jobs, no waiting for a sync.

median lag ~ 400ms

Head-to-head

Pick two friends, pick a combo, get a sector-by-sector breakdown. Find out where you’re losing time — or where you’re robbing them blind.

S1 · S2 · S3 deltas

Full history

Every lap you’ve ever set, filterable by track / car / session. Your personal best progression over months, not just sessions.

unlimited retention

Zero overhead

Less than 0.3% CPU while you drive. No overlay, no DLL injection, no telemetry SDK. Reads iRacing’s own session log.

~0.3% CPU · ~20 MB RAM

Open source

MIT-licensed companion. Audit the wire format, host your own backend, fork it. The whole thing is on GitHub.

github.com/lapbattle

90 seconds

See it work in real time.

Companion in the tray, a lap finishes in iRacing, the dashboard updates, a friend gets dethroned. The full loop.

REC · 00:00 / 01:34

1080p · 60FPS

SPA-FRANCORCHAMPS · FERRARI 296 GT3

▲ LIVE FROM YOUTUBE

How Lap Battle works · 1:34 · YouTube

5 steps · ~2 minutes

The whole setup, on one page.

No 40-page docs site. Here's everything, top to bottom. You can start driving before you finish reading.

lapbattle — setup

01 $ create account at lapbattle.gg

✓ account ready · alex@rader.dev

02 $ download LapBattleCompanion.exe from GitHub

✓ 6.2 MB · sha256 verified

03 $ right-click tray icon → Settings

✓ companion online · waiting for token

04 $ paste your token (find it in /settings)

✓ linked to @alex.r

05 $ start iRacing — drive normally

✓ first lap captured · 2:13.334 · spa · ferrari 296 gt3

04 · your token

One token per PC

Found in Settings → Companion token on the web app. Treat it like a password — anyone with it can submit laps under your account. You can regenerate at any time.

A note on test drive

Yes — Test Drive counts.

iRacing's own stats ignore Test Drive sessions. Lap Battle doesn't. If you grind a track alone at midnight, your lap still hits the board the next morning. That's the whole point.

heads up

Windows only — for now.

iRacing runs on Windows, so the companion is Windows 10/11 only. Linux/Mac support is on the roadmap behind multi-PC sync and macros for setup tags. Vote on what we build next on GitHub.

Beat your
friends.
Lap by lap.

Three things, then drive.

Built for racers who read timing screens for fun.

See it work in real time.

The whole setup, on one page.

The fast lap means nothing
until someone sees it.

Three things, then drive.

Built for racers who read timing screens for fun.

See it work in real time.

The whole setup, on one page.

The fast lap means nothing until someone sees it.

The fast lap means nothing
until someone sees it.