Water tools that bring people back
Four free tools, no email required, nothing sent anywhere - each one runs in your browser and answers a question filter shoppers actually have.
Filter Finder quiz
Six questions about your home, water source, worries and budget - one recommendation with the runner-up and the reasoning shown. It will also tell you when the honest answer is "a countertop filter can't do that job."
Take the quiz →True-cost calculator
System + replacement filters vs. bottled water, over five years, in real dollars - prefilled with the prices we track, every figure editable.
Run the numbers →Replacement reminders
Pick your system and your last change date; get your next four change dates and a calendar file you can keep. The cheapest performance upgrade is a fresh cartridge on time.
Set a reminder →Replacement filter hub
Every cartridge, interval and annual running cost for all 21 systems we track, in one table - the page to check before you fall in love with a cheap machine.
See the hub →Not sure where to start?
Start with the facts about your own water - a free utility report or one lab test beats guessing.
Get the tools by email, monthly
Certification-first picks, price-drop alerts on the systems we track, and a nudge before your cartridge is due - about once a month. No spam, unsubscribe anytime.
Prefer not to share an email? The reminder tool gives you a calendar file instead - no signup at all.