Log Book
Privacy
Log Book is a private tool run by Ange Grayndler for herself and a few other people. This page says exactly what it holds. It is short because the app does little.
What it stores
Your email address and a hashed password, so you can sign in. If you sign in with Google, your email address and nothing else from that account.
Your cars: what you call them, the rego if you enter one, and a colour.
Your odometer readings.
Your trips: the date, the kilometres, the odometer readings, where you went, and what the trip was for.
Taken together that is a record of where you were on which days. Treat it the way you would treat a paper diary.
What it does not store
Nothing about your money. No receipts, no fuel costs, no invoices, no bank details. The Year screen works out the cents per kilometre figure from your kilometres and a published rate, and that is the only dollar amount anywhere in the app.
It has no access to your calendar, your mail, your files or your contacts.
There is no analytics, no advertising and no tracking of any kind.
Who can see it
Only you. Each row in the database is tied to the account that made it, and the database refuses to return anybody else's rows regardless of what the app asks for. That rule sits underneath the app rather than inside it, so it holds even when the app has a bug.
It is not encrypted end to end. Anyone with administrative access to the hosting could in principle read the database, as with any normal app. If that is not a trade you want to make, do not put your trips in here.
Where it lives
The app runs on Vercel and the database is Supabase, hosted in Sydney. Both are ordinary commercial hosting companies with their own privacy terms.
Getting your records out, and deleting them
Any year of trips downloads as a spreadsheet from the Year screen, including dates, destinations, purposes and odometer readings. Do that at the end of each income year and your records are yours no matter what happens to this app.
Individual trips, readings and logbook periods can be removed in the app. Ask and the whole account goes, in full, including every trip.
Nothing is kept as a backup copy beyond the hosting companies' own routine backups, which they age out on their own schedules.
Tax records
The ATO expects you to keep records supporting a claim for five years after you lodge. This app is not a substitute for that, because it is one person's hosting bill away from disappearing. Download the spreadsheet each year and keep it somewhere you control.