FilterSlate

FilterSlate is a private, offline-first household filter replacement and spare-parts ledger. It keeps locations, specifications, schedules, every replacement, and every inventory change together in one trustworthy record without an account, subscription, advertising, analytics, or cloud dependency. • Organize air-conditioner, water-filter, air-purifier, and other filter positions by room and appliance • Save filter names, part numbers, specifications, last replacement dates, intervals, reminder timing, notes, and an optional photo • See overdue, upcoming, and later replacements on one due dashboard • Preserve each replacement as an immutable event; corrections add an explicit reversal instead of rewriting history • Build a spare-parts catalog whose current stock is calculated from stock-in, use, adjustment, and reversal events • Select a linked spare when recording a replacement so replacement history and inventory remain consistent • Schedule local notifications for filters approaching their due dates • Export a readable summary plus filter, replacement, and inventory CSV files • Create a checksum-verified complete backup with selected photos, preview it before import, then merge or replace safely Your filter records stay in the app's private container on your iPhone or iPad by default. Selected content leaves the device only when you explicitly export, share, or submit feedback. Optional feedback can include your message, contact email, selected screenshots, device and operating-system details, and App Attest integrity evidence. FilterSlate does not judge air or water quality, replace manufacturer instructions, or recommend purchases. Always follow the filter and appliance manufacturers when choosing a part and replacement interval.