Hiking Trail HK is a Hong Kong hiking mobile app. providing offline map and over 100 hiking trails in HK, and supporting route drawing, route sharing, route length/gain/loss calculation, time estimation, GPS location, compass, track logging, deviation alert, and etc.
Before hiking, you can use the route drawing function to plan the route, and use the elevation profile to infer its difficulty, and estimate the time needed. During hiking, offline map is always available even if there is no data connection, and route deviation alert function can prevent you from getting lost.
You can pay for one-time purchase or annual subscription to unlock the trial features or remove the ads in the app and the website.
Route search: https://hikingtrailhk.appspot.com/en/search