POSB Smart Buddy is a free Android application developed by Network for Electronic Transfers SG Pte Ltd. It is the world's first in-school savings and payments wearable for children. The app allows parents to manage their child's finances and encourage smart living and saving habits while on the go.

The app's main feature is the ability to let children tap to pay in school and at selected merchants, check their balances, and track their fitness levels. Parents can set daily allowances, create savings goals, and monitor spending and savings. The app also allows parents to link payment cards such as the Smart Buddy, School Smartcard, and EZ-Link Card. Additionally, parents can link the Smart Buddy Watch for fitness tracking.

Overall, POSB Smart Buddy is a convenient and innovative way for parents to manage their child's finances and encourage smart living and saving habits.