The HK Immigration Department mobile application is a free utility tool that provides a comprehensive range of immigration services. It is designed to cater to the needs of Hong Kong residents and visitors alike who require immigration-related services. The app offers several functions, including appointment booking, application services, form filling, and land boundary control points waiting time.

The app's "My Tag Status" feature allows users to check their immigration status, while the "e-Visa" feature enables visitors to apply for a visa online. The app also provides submissions of documents, a hotline for assistance, and contactless e-Channel services. The "I-RemindU" feature helps users keep track of their visa expiry dates. Additionally, the app provides access to the Immigration Department YouTube Channel for more information.

It is important to note that using the HK Immigration Department mobile application may incur data transmission fees. Therefore, users are advised to keep track of their data usage. The app is available on Android devices and is developed by HK Immigration.