01
The schedule, honestly.
What's due, what's coming, and what we simply don't know yet — said plainly. A reminder shows its work: "oil in ~600 mi, from your July reading." Never a guess dressed as a fact.
MAINTENANCE · HISTORY · VALUATION
Care is what makes
a car worth something.
Known is a maintenance app that keeps a real history file. Scan the VIN once — it tracks what's due, remembers everything you've done, and holds a live valuation from the collector-auction market. The documented car is the valuable car.
SEE THE FILE iOS · TestFlight soon
SPECIMEN FILE — Nº 0001
1995 Porsche 911 Carrera (993)
VIN WP0AA2990SS320481 · 57,644 MI AS OF JUL 2026
MARKET, 993 C2 COHORT
$89,500
▲ 12.4% SINCE FILE OPENED · 41 SOLD COMPS
| DATE | ODOMETER | WORK PERFORMED | COST |
|---|---|---|---|
| MAR 12 2019 | 38,412 | Oil & filter — Motul 8100 | $142 |
| SEP 03 2020 | 41,977 | Brake fluid flush — ATE TYP 200 | $168 |
| JUN 21 2022 | 47,850 | Clutch + RMS, IMS inspected | $3,214 |
| FEB 09 2024 | 52,106 | Tires — Michelin PS4S, DOT 0424 | $1,388 |
| JUL 30 2026 | 57,644 | Oil & filter, valve cover reseal | $611 |
FULL HISTORY · 23 ENTRIES · EVERY RECORD DATED, MILEAGE-STAMPED, APPEND-ONLY
02
The logbook is the asset.
Thirty seconds to log a service. Every entry compounds into the file that makes your car worth more when it matters — the one thing a buyer actually believes.
03
The number, live.
A valuation from real auction results — your cohort, not a black box. Thin data returns no call, not a confident wrong answer.