FilterFlow: Replacement Log

FilterFlow is a free, local-first workspace for mapping filter systems and keeping condition-based service evidence. Build the actual flow path, plan checks from your own inputs, and preserve the decision behind every change without creating an account or subscribing. MAP COMPLETE FILTER SYSTEMS • Create ducted or split HVAC, whole-house or under-sink water, air-purifier, range-hood, refrigerator, vacuum, humidifier, dust-collector and custom systems • Save equipment-specific capacity, unit and configuration details • Arrange intake, pre-filter, main-filter, post-filter, carbon, membrane, grease, UV-sleeve and custom stages in flow order • Record each stage’s part number, dimensions and media or rating PLAN BY CYCLE AND CONDITION • Enter a base replacement cycle from your own maintenance source • Apply explicit light, standard, heavy or continuous usage load • Account for clean, dusty, pet, smoke, construction, hard-water or grease environments • See the transparent base-cycle × usage × environment calculation • Put a user-marked condition flag ahead of the date queue RECORD WHAT ACTUALLY HAPPENED • Choose replaced, keep in service, cleaned, deferred or stock unavailable • Save one or more reasons, including visible loading, pressure change, flow drop, taste or odour, damage, manufacturer guidance and routine inspection • Capture optional before/after pressure-drop, flow-rate, airflow, runtime or custom readings • Keep the exact condition and cycle-factor snapshot with the decision CONTROL SPARE STOCK • Create separate bins by exact part and storage location • Set a reorder threshold and link compatible stages • Derive on-hand quantity from dated opening, receipt, use and count-correction movements • Link one consumed spare directly to its replacement record KEEP AN IMMUTABLE LEDGER • Maintenance records cannot be individually edited, deleted or undone • Add a linked correction record without changing the original evidence • Archive systems while retaining their service history • Export system, stock and record CSV files, a readable log or a complete schema-2 JSON backup A RESPONSIVE TECHNICAL WORKSPACE Due, Systems, Stock and Records use a compact phone dock and a persistent tablet rail. Ordered schematic nodes make multi-stage airflow and water-flow layouts easy to scan. EVERY FUNCTIONAL FEATURE IS FREE Unlimited systems, stages, cycle planning, condition checks, stock bins, immutable records, reminders, exports and restore are available without purchase. FilterFlow has no in-app purchases, subscriptions, trials or paid-only tools. FilterFlow is supported by conservative advertising. A labelled banner stays outside editors. App-open advertising begins after the first session and is frequency-capped. An optional rewarded ad changes only a temporary visual accent; it unlocks no functional feature. There are no interstitial ads. IMPORTANT PLANNING BOUNDARY FilterFlow organises user-entered maintenance evidence. It does not recommend or predict service life, diagnose equipment, assess contamination, air or water safety, compatibility, servicing or installation. Follow manufacturer instructions and qualified advice.