Suzanne is looking for an expense app for her iPhone and desktop. Leo says he suggests using a cloud based option to minimize the hassle of syncing. Mint is a great option, and they use the same clearing house that the banks use -- Yodely -- so security isn't a worry.
The Chatroom says that XERO is the latest cloud based accounting option. But if she just wants to keep track of her expenses, go with Mint. She should make sure to turn on second factor authentication if she has the option, but sadly Mint doesn't support it.