My top app ist Money Wallet, a really powerful financial management package. I use it to administer daily, weekly and monthly income and expenses in different currencies for differenct accounts. Due to it's very powerful and flexible reports, I have a perfect overview of my financial situation in the moment I need it. It is also one of the very few WP apps allowing the import von QIF-files (QIF-import worked flawlessly for me). Withouth that app, I may already have switched to IOS or Android. The functions and power of Monew Wallet are comparable to the legendary Windows Phone Software SPB Finance.