Good coffee.
Better math.
One Jura E4. Your daily ritual.
A surprisingly good return.
Estimated annual operating savings
your machine's recovery.
Your daily rhythm
Explore the math. Your saved routine stays put.
Small ritual. Long game.
View the numbers behind the curve
The year in coffee
Past estimates use dated prices. Missing history stays labeled.
Coffee math is wild.
Same ritual. Changing prices.
A little journal for the prices behind your savings.
Prices applied to the savings model
Observations only affect savings when you explicitly apply them. A new price applies from its effective date; earlier prices remain intact.
Compare all six daily routines
Good math starts with honest assumptions.
Estimated, not logged
Consumption is your daily routine × average usage frequency × completed calendar days. Today is not counted until tomorrow. A purchase date is a first-use proxy only if you choose it.
Two kinds of savings
Operating savings compare Starbucks with beans and additional running costs. Net savings also subtract the machine purchase. Recovery is 100% at payoff; net ROI is 0% then.
Your price sources
Initial bean and Starbucks prices are editable estimates, not verified offers. Recorded prices keep their own source, date, store, and tax basis. Future projections hold the latest applicable prices constant.
Made for your browser
Data stays on this device. There is no automatic price collection or cross-device sync. Export a backup to keep your history or move it to another device.