Customize: to personalize
Feature: characteristic
Achieve: to gain with effort
Available: ready for use
Budget: limited money to spend in a specific period of time
Download: to transfer from the web to a computer or cellphone
Trial: a period of time when an application or software is free
Bill: a list of charges for certain service
Pay: to give money in return for a product or service
Reminder: a note to remember
Free: with no monetary charge