This app was mentioned in 2 comments, with an average of 1.00 upvote
You can just look up expense manager on google play or the app store. There are tons of free utilities. I personally use
https://play.google.com/store/apps/details?id=com.moneytower.expmngr
It's basic, but does the job for me. Also, regarding your budget, as long as you know your monthly expenditures, it should not matter if you can track bi-weekly, or monthly. Your outgoing expenses won't change (much) if you have a budget and stick to it. And then anything over that budgeted expense amount is just savings. Remember - budgets are really meant to track expenses, not income.
Its called 'expense manager' for android. It's probably on iTunes too.
https://play.google.com/store/apps/details?id=com.moneytower.expmngr