Batch log and alarms for mead makers

The idea

Modern meadmaking lives and dies by staggered nutrient additions: precise gram amounts of Fermaid at pitch, 24, 48, and 72 hours, then at the one-third sugar break. Miss one and you get a stalled ferment or a mead that tastes like rocket fuel for a year. Today this is tracked in spreadsheets, TOSNA web calculators, and phone alarms labelled MEAD, none of which know about each other.

Brewfather and Brewers Friend are built for beer and treat mead as an afterthought, so a 200k-member subreddit runs on copy-pasted calculator links. The wedge is collapsing calculator, schedule, and alarm into one object: create the batch, get the grams, get the pings.

Who pays

The buyer is a hobbyist with 30 dollars of honey per batch on the line and a fermentation fridge in the garage; 20 dollars a year is cheap insurance against a ruined five-gallon batch. Free tier covers two active batches to hook beginners. Distribution is unusually concentrated: r/mead, the Meadmaking subreddit wiki, and a handful of YouTube meadmakers (City Steading, Man Made Mead) whose comment sections beg for exactly this.

MVP scope

• New batch wizard with honey/volume/yeast inputs and computed starting gravity
• TOSNA and staggered Fermaid K + DAP calculators generating a per-batch schedule
• Local push-notification alarms per addition, with done/snooze logging
• Gravity log with SG/Brix support and automatic ABV
• Batch sync via Supabase magic-link accounts
• Skip for v1: beer/wine modes, recipe sharing, inventory management, Tilt hydrometer integration

Build MeadMinder, a React Native (Expo) app for mead and cider makers built around staggered nutrient schedules, the thing Brewfather ignores.

Batch creation flow: user enters batch volume, honey weight (or target starting gravity, compute the other), yeast strain from a preloaded list with nitrogen requirement (low/medium/high), and picks a nutrient protocol: TOSNA 2.0/3.0 (Fermaid O only) or a classic staggered Fermaid K + DAP schedule. The app computes gram amounts per addition using standard YAN maths and generates the schedule: additions at pitch, 24 h, 48 h, 72 h, and the 1/3 sugar break, each as a scheduled push notification tied to the batch.

Notifications deep-link to a Done screen that logs the addition with timestamp and lets the user snooze 2 hours. Missed additions surface as a red banner on the batch card.

Also include: gravity log with automatic ABV calculation (support both hydrometer SG and Brix with conversion), free-text notes with photos, and batch status (primary, secondary, aging, bottled).

Screens: Batch list, New Batch wizard, Batch Detail (schedule timeline, gravity chart, notes), Settings.

Backend: Supabase with magic-link auth so batches sync across devices; schedule notifications locally on-device so they fire without connectivity. Pricing: free for 2 active batches, 20 dollars per year for unlimited.