I'll just repeat what everyone else has said:
1. You will not be able to rely on your vet to adjust the dose because (a) vets simply don't know enough about FD (b) they aren't responsive enough if you have to call, leave a message, wait for a call back.... (c) it's too expensive
2. It doesn't matter what meter you use.
3. The current dose is too high
4. There are plenty of people here who can help guide you: with dosing, with getting your cat onto lower carb food, with saving money, etc.
So here is the link to the spreadsheet:
http://www.felinediabetes.com/FDMB/threads/fdmb-spreadsheet-instructions.130337/
That is a powerful tool in figuring out how to adjust your dose. Once you get it set up and enter the data you have so far, we can help you figure out next steps. If you have trouble getting it set up, ask for help. There are some tech-y folks around here who can help if you need it.
There is a lot to learn at the beginning, but it will get easier, and we'll help you get it sorted out.