FilterKing.com, rebuilt to earn the subscription
A clickable concept that starts with your filter size, shows honest per-filter prices, and lets shoppers choose auto-delivery instead of finding it preselected — on a phone and on desktop.
Corey Frons · Independent work, not affiliated with Filter King
Product page on a phone — tap to try it
Click through four screens
Built in Filter King's own navy, red and Poppins. On the product pages, switch filter quality, pack size and how you buy, and every price, saving and button label updates. Every screen links back to the case study.
Desktop versions: homepage and product page — best on a laptop.
The moment a phone shopper pays
On filterking.com, "Subscribe & save 5%" is already selected, and the sticky bar shows the subscription total without saying so. In the concept, one-time is the default and auto-delivery is a choice the shopper makes.
Auto-delivery by choice, prices in plain words
Filterbuy and Nordic Pure both default to one-time. A preselected subscription grows sign-ups that cancel, and state auto-renewal laws expect a clear yes.
The concept also drops the struck-through $186.78 — six single filters no one buys — for "$7.99 each in a 6-pack, 74% less than buying one".
All three comparisonsThe audit behind every screen
Sixteen ranked findings on filterking.com, real-user speed and Lighthouse results, a WCAG accessibility review, a competitor benchmark, a roadmap, an A/B measurement plan and an opportunity calculator — plus developer handoff specs.
- Preselected: Subscribe & save is checked by default — rivals default to one-time
- $8.08: each for 12+ MERV 13 filters, more than the 6-pack's $7.99
- 74% OFF: a 6-pack compared with six single filters at $31.13
- 6.6 screens: of scrolling to reach "Shop by MERV rating" on a phone