Shower Score
The TENDRA Shower Score
How much is your water working against you?
Five quick questions. You get a score out of 100, your yearly shower hours, and exactly how often your cartridge needs changing.
0/100
Typical hardness where you live
Hours a year you spend in the shower
How often to change your cartridge
Your best fit
Your Shower Score is an estimate of how much hard, chlorinated water you're exposed to. It combines typical hardness for your postcode area (published water company data) with your shower time. It isn't a water test or medical advice. Cartridge timing assumes about 70 showers per cartridge.