Mellow is an easy to use budgeting or expense tracking app for those who like to keep things simple. It can be used for biweekly budgets, monthly budgets, expense tracking and whatever else you can dream up.

Plan.
Titles for your individual budgets.

Line Items.
Anything added to your budget - transaction, allocation, or income.

Income.
Money you received. Always grouped in the income category.

Transaction.
An expense that’s deducted from your total income.

Allocation.
An allotment of money set aside for a specific purpose. Transactions can be added to allocations and the remaining amount is shown on the main budgeting screen. Allocations can be thought of as envelopes.

https://www.apple.com/legal/internet-services/itunes/dev/stdeula/