Well you buy refills. So first purchase is a fancy box with metal tube of about 24 strips IIRC plus the card. Download app on to phone, enter tank description and then you make a measurement. Basically this entails:
Tell app you are doing a test and the app starts a 60 sec timer
Place strip in tank for 3 secs
Remove strip and shake off excess water
Place strip on test card and find some where with a non reflective background . So not the marble work top.
At 0 sec the app opens the phones camera and you show it the test card and strip.
App looks at the colours and decides the various parameters.
You can store data in the app and it also backs up to their website. It is not perfect but I like it as I am red green colour blind so test strips are a right PITA otherwise.
Tell app you are doing a test and the app starts a 60 sec timer
Place strip in tank for 3 secs
Remove strip and shake off excess water
Place strip on test card and find some where with a non reflective background . So not the marble work top.
At 0 sec the app opens the phones camera and you show it the test card and strip.
App looks at the colours and decides the various parameters.
You can store data in the app and it also backs up to their website. It is not perfect but I like it as I am red green colour blind so test strips are a right PITA otherwise.













