2D Helper is a free Android application developed by Han Lin Tun for 2D lottery sellers. It offers an easy and safe way to record customer information and get calculated summary data. With this app, sellers can know how many people buy for a particular 2D number and how much amount is collected for that number. This enables them to decide which number exceeds their ability to play a match and take necessary actions. Additionally, in the reports screen, sellers can generate a report including total sale, total profit, total payback, and total hit amount for a specific 2D number.

In the app settings, sellers can adjust some functions, such as payback rate and the amount of their ability to play a match. They can also delete all recorded data to renew the app for a new match. Overall, 2D Helper is a smart solution for 2D lottery sellers who want to improve their business field and gain more reliability from their customers.