Track Notes is a per-track notebook in the AVB RaceLabs Pit Kit. Each track gets one note with five fields: Gearing that worked, Personal best, Braking markers & kerbs, What worked, and Try next time. Your tracks are listed alphabetically, and each card shows its gearing and PB at a glance, so you can find the right note in the awning without scrolling through a season of sessions.
Karting knowledge goes stale quickly. You might go back to a circuit after six months and not remember whether 11/78 or 11/80 was right in the damp, or which kerb unsettled the kart. If you write it down while it is fresh, your next visit starts from last time's answer rather than from scratch. That means fewer wasted laps in practice, which matters when a test day only gives you a handful of sessions.
The note also links to your timing. If you have saved sessions in Stopwatch & Laps under the same track name, opening the note shows a "Stopwatch best" pill with your quickest saved lap at that track. Track names are matched without regard to capitals. You can type the track name yourself or tap Pick from track library to choose from the AVB track catalogue, which also refreshes the pill straight away. The library needs you to be signed in and online to load, but typed notes work without either.
Notes are saved on your phone, so you can read and edit them at a circuit with no signal. On Free you can keep notes for 3 tracks, and you can always edit those 3. Premium lifts the cap and adds PitSync cloud backup, so your notes come back on a new phone.