Plan the brew
Use Ratio Calculator to solve for dose, water, or ratio, or choose a starting recipe from Recipe Library for the brewer and roast in front of you.
COFFEE TOOLS · 10 BUILT IN
Keep the coffee math you use at the brew bar in one toolkit.
OLLA includes 10 coffee tools on iPhone and iPad: brew timer, extraction yield, espresso parameters, coffee ratio calculator, water recipes, cupping, grind conversion, roast degree, flavor wheel, and a recipe library. The result can continue into the coffee record instead of ending in a calculator.
MEASURE · BREW · RECORD
The tools are part of the workflow, not a drawer of isolated calculators.
Plan a ratio, brew, measure TDS and extraction yield, then save what happened. OLLA keeps the common calculations in one app so you do not have to jump between unrelated utilities.
Follow the brew
Brew Timer presents bloom, staged pours, and target timing from the selected brewer, filter, and recipe.
Measure the result
Enter dose, beverage mass, and TDS to calculate extraction yield, then check water, grind, or roast references when you need more context.
Keep the record
Save final parameters and sensory notes to the same coffee so the next brew can start from evidence rather than memory.
BREW MATH
Coffee ratio, TDS, and extraction yield without dead-end calculations.
Ratio Calculator solves forward or backward from the amount you know, while Extraction Yield combines dose, beverage mass, and TDS after the brew. They answer different questions: one plans the recipe, the other checks the extraction that actually happened.
- Ratio Calculator: solve dose, water, or ratio and scale recipes
- Extraction Yield: Dose + Beverage + TDS → Extraction Yield
- Espresso Lab: dose, yield, time, flow, and pressure references
- Brew Timer: bloom, staged pours, and target timing in one guided flow
WATER · GRIND · ROAST
Replace three fuzzy variables with references you can look up.
Water, grind, and roast degree are often communicated as rough adjectives. OLLA uses GH × alkalinity, verified bottled-water specifications, micron references, and Agtron values to give those discussions a more consistent coordinate system.
- Water Recipe: blend and compare water on a GH × alkalinity map
- 80 bottled-water records checked against manufacturer specifications
- Grind Guide: micron-based references across 26 grinders
- Roast Reader: eight roast levels with Agtron references
TASTING & REFERENCE
After the brew, keep working with what is in the cup.
The toolkit is not only about arithmetic. Cupping, Flavor Wheel, and Recipe Library connect planning to tasting: find language for a flavor, record the cup, revisit the recipe, and attach the result to the coffee history.
- Cupping Score for structured cupping records
- Flavor Wheel expands from broad families to 85 specific descriptors
- Recipe Library contains 105 recipes filterable by difficulty, roast, dose, and ratio
- Equipment reference covers 48 drippers and 72 paper filters
FROM NUMBER TO CUP
The calculation is only useful if it helps the next cup.
OLLA's tools share one recording workflow: plan, brew, measure, taste, and save. Parameters and sensory results stay together instead of scattering across calculators and notes apps.
DOSE→RATIO→BREW→TDS→EY→TASTE→SAVE
10 TOOLS · ONE APP
Open fewer tabs. Keep the coffee tools you actually use at hand.
OLLA Brew Lab runs on iPhone and iPad, with coffee tools and coffee records in the same local-first workbench.