Is there a reason this friend is suggesting you check the pH?
Do you have hard water stains that you don't want to reappear? That's water hardness, not pH (although the minerals do tend to be alkaline).
If you are on "city water", I believe the pH, hardness, turbidity, .... all have to be within certain standards when it reaches your property. You can get a water quality anaylsys from the water district that serves you. Unless you have something really crazy going on in your pipes, you shouldn't see much change from the meter to your faucet.
That being said, the simplest way to check pH would be to get some test strips at the pet store for testing aquarium water. Also try a pool/spa store for water test kits.
No need to send away for something online and pay as much in shipping as the item costs in the first place.