What will it really cost?
A cheap gadget with a monthly plan can cost more than an expensive one without. Enter two options to see the total over one, two or three years.
Result
Example figures are marked "example". Replace them with today's prices from the retailer or brand. PitPat figures are from PitPat's UK pricing as of October 2026.
What to include
Price to buy: what you pay for the device today, including any starter kit.
Subscription: the monthly plan cost. If you pay yearly, divide the yearly price by 12. Yearly or multi-year plans are often much cheaper per month.
Refills: filters for fountains, liners or litter for self-cleaning boxes, dock bags for robot vacuums, and replacement batteries.
Not sure what something costs to run? Each of our buyer's guides lists the subscription and running costs for every pick.