Handy lah is a free mobile application that aims to help Hong Kong homemakers save money and make informed purchasing decisions by providing instant price information. With the rising prices and inflation, it has become increasingly difficult for the general public to keep up with the increasing cost of consumer goods. However, Handy lah offers a solution to this problem by providing instant price comparisons across different supermarkets, allowing homemakers to buy more with less money or buy the same amount of product with the same cost.

One of the key features of Handy lah is its price watch function, which enables users to set up their personal shopping list and receive alerts when the price of a product drops below a certain level. In addition, Handy lah provides historical lowest prices of a product sold within a month, and a trend line showing the price trend of the product within a month to help users study the trend of the price. With the price information of each product, Handy lah can provide additional data on the trend, which allows Hongkongers to make informed purchasing decisions, increasing market transparency.