DynoLog

DynoLog is the build journal for people who actually wrench on their cars. Whether you're chasing a quarter-mile drag time, documenting a full project car build, or just keeping honest track of where the money's going on mods, DynoLog gives your build a home. No spreadsheets, no scattered photos, no forgetting what you paid for that turbo eight months ago. TRACK YOUR BUILD Log every car modification with cost, vendor, install date, and notes. Watch your total build investment add up. Keep receipt photos attached to each mod so nothing gets lost. LOG YOUR DYNO & TRACK RUNS Record performance runs — ET, trap speed, and horsepower — and see them plotted over time. Correlate mods to gains: see exactly which modifications moved the needle and by how much. DOCUMENT THE JOURNEY Your build's full timeline in one place. Every mod, every dyno pull, every run, every milestone, in order. SHARE YOUR RIDE Publish your build to a clean public page you can share anywhere. Browse the community feed, follow other builders, and like and comment on builds that inspire you — real builds from real car enthusiasts. WORKS WITH HOWFAST Already running HowFast? Send your performance runs straight to DynoLog by direct link, file export, or background cloud sync, and keep all your vehicle data in one build logbook. FREE TO START Track one vehicle, log mods, and record runs for free. Upgrade to DynoLog Unlimited — a single $6.99 purchase, yours forever, with no subscription — for unlimited vehicles, the receipt photo vault, PDF build sheet export, and the full timeline view. Built by enthusiasts, for enthusiasts. Your garage, in your pocket.