Flow rate first
Grams per second is the fastest sign something is off — before the ratio and the timer look wrong.
Espresso · iPhone
You turn the dial.
But which way?
Log what you pulled — grind size, dose in, yield out, brew time. SingleDose tells you how many steps finer or coarser. And why, written out, so that by the next bag you know what went wrong without opening the app.
How it works
Coming to the App Store · no account, no subscription
One shot in, one adjustment out.
Other apps hand you charts and leave the thinking to you. SingleDose names exactly one change — in the units your grinder actually has.
- Grind
- 25.0
- Dose in
- 18.0 g
- Yield out
- 44.0 g
- Brew time
- 21 s
- Bean
- Medium, 8 days off roast
2 steps finer
Flow is running at 2.1 g/s — far too fast. The ratio is wide at 1:2.4 and
the shot ended at 21 s. Both point the same way.
What the recommendation weighs
No black box. The rule that fired is always shown.
Ratio and brew time
How far the shot drifted from 1:2 and from the 25 to 32 second window — and which of the two is the actual cause.
How old the beans are
Days off roast, weighted by roast level. A dark roast degasses faster than a light one, so the correction arrives before your shots run away.
And the rest
Bluetooth scale
The app notices when flow starts, times the shot and fills in yield and brew time itself. Supported today: the Bookoo Mini. Without a scale everything works the same — four numbers by hand.
Logbook
Every combination of grinder, bean and brew method keeps its own grind setting. Come back next week and the number is still there.
Set up in a minute
The first launch asks for your grinder and your beans, and ends on a starting grind setting — before you pull anything.
What it looks like
Taken from the app, not mocked up.
No account. No cloud. No subscription.
SingleDose has no networking code. Your grinders, beans and settings live on your iPhone and nowhere else — there is no server for them to reach.
Coming to the App Store