Used to work out your monthly bill.
Days your vendor never delivers. These are not counted or billed.
Only if more than one person brings milk. The name at the top is your first vendor. Each kind below belongs to one of them, which is how two vendors can charge different prices for the same milk — and each is billed and owed separately.
Only if you buy more than one sort. Each carries its own price per litre — set it to what your vendor actually charges. Marking a day the ordinary way still uses the price above; long press or right click a day to say it was one of these.
A closed month cannot be changed by a stray tap, on any phone sharing this book. You can always unlock one when you genuinely need to.
Closing months protects the ones that have ended, but the month on screen is the one a thumb actually brushes. While it is protected, tapping a day does nothing and today is marked with the button at the bottom — a long press there sets a different quantity.
Opening a month is for making a correction, not for leaving it open. When the time is up it protects or closes itself again, and the chip above the calendar hands it back the moment you are done.
Turns off every lock at once, for whoever keeps the book. Nothing is hidden and nothing is deleted — it only stops the book refusing you. A banner stays on screen while it is on, so it is never on by accident.
Your records live on your phones and nowhere else. A copy kept somewhere else is the one thing that survives a phone being lost, wiped or replaced.
One file in your own Drive, read when you open the app and written when you change something, so every phone signed into this account shows the same book and a new one only has to sign in. This app can only touch the file it made — nothing else in your Drive — and never sees your password. Nothing here waits on Drive: if it cannot be reached, the book carries on from this phone and goes up the next time it can.
Pick a file inside your Google Drive, OneDrive or Dropbox folder and the book reaches the cloud on its own, without this app ever touching your account. Choose allow on every visit when the browser asks, so it keeps working without being told again.
Restoring adds a copy back in without removing anything already here. Saving the app as a file downloads the whole thing with your book inside it — open it any time, with no internet and nothing to install. That one is a snapshot: days recorded here afterwards will not be in it.
You are using a saved copy. It works entirely offline and keeps its own book, separate from the one in your browser.
Tap a day on the calendar to cycle it. Use this for a different quantity, or to say which milk came.
Leave as your default unless it was different.
For a day when more than one vendor came, or two sorts arrived together.
For a holiday, a week you forgot to record, or a stretch that was all the same.
Everything billed since you started, against everything you have paid.
Part payments are fine. The balance is simply everything billed minus everything paid.
Every payment recorded in this book, newest first.
Every change made to this book, newest first, with the phone that made it.
The book as it stood at the start of each of these days, kept on this phone. If something has been changed by mistake, you can put one of them back.
It gets its own icon and opens full screen, with no address bar. Your book stays on the phone and still works with no signal.
Your data lives on this device and works offline. Sync keeps a copy so your family's phones agree.
Shown to the rest of the household when this phone asks to join, and against every change it makes. Two phones both called "Android phone" are impossible to tell apart.
Anyone with the code can read the book, so only share it with your household. Changing it needs a phone the household has let in. No account, no email, no tracking.
Sync is not a backup. It is where your phones meet to agree, and it can be emptied at any time — whichever phone syncs next fills it again. Your records live on the phones. To keep a copy anywhere else, save the app as a file in settings.