Keeve

A.P.P. CARPENTRY

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About this app

Keeve is a batch log for cider makers using real apples. The app tracks each batch from the day the apples are crushed to the day the cider is bottled: what goes into the press, how the apple juice ferments, and what the cellar needs for the next step. It operates completely offline, with all data stored directly on your phone.

Start on the day the apples are pressed. Select the crushed varieties from a catalog of over two dozen classic apple cider varieties, enter the initial weight in kilograms, liters of juice, and specific gravity, and note how the apple pulp is extracted. The app categorizes the batch using the Long Ashton system (sweet, tart, tart-sweet, or tart-sour) based on the acidity and tannins of the fruit, and estimates the alcohol content at the end of fermentation.

From there, tracking is simple: measure the specific gravity every few days with a hydrometer and record it. Each batch plots its own fermentation curve, compared to the final density range, displaying current alcohol and fermentation levels, and marking the keeving, chapeau brun, and decant dates directly on the chart. The cellar screen consolidates everything into clear steps to take, such as checking the brown cap of the keeving vessel, draining the liquid beneath the cap, or warming up a stalled fermentation batch. You can also set reminders for any batch; Keeve will notify you when it's time for the next measurement or decant.

Traditional keeving is fully supported. Recording enzyme and calcium doses, noting the cap formation and decant times, the app will indicate when the wine made this way reaches a bottling density, allowing for natural carbonation and a gentle sweetness without added sugar.

The blending room allows you to experiment with ratios before making a decision. Add each apple variety, adjust the number of liters of each using sliders, and then see where the mixture falls on the acidity and tannin map. Select your desired acidity level, and the app will calculate how many more sour apples are needed to achieve that level.

When bottling, select your desired carbonation level (petillant, sparkling, or champagne-style) and the type of sugar to use for carbonation. The calculator takes into account the amount of dissolved CO2 based on cellar temperature, giving you the total amount in grams for the batch and for each 750 mL bottle, along with a warning if the specific gravity is too high to safely carbonate.

Key Features:

• Pressing log with apple variety, kilograms, amount of apple juice obtained, and notes on pulp
• Specific gravity measurement with fermentation curve, alcohol content, and fermentation level
• Keeve and decapping timeline, with next-step suggestions for each batch
• Stagnation detection
• Notification reminders
• Apple orchard catalog with 24 wine apple varieties, viewable in a filterable grid or acid-tannin map, with your own collection marked
• Blending room with acidity regulator
• Carbonation calculator for three carbonation levels and three sugar types
• Batch photos, taken with camera or selected from the photo library

With Keeve, the entire cider season is in one cellar logbook that you can open between measurements.

What’s new

First release.