Octopus for Tourists
Free; top up from HK$100
Puts an Octopus card in Apple Wallet with a foreign card โ the one thing that works on minibuses, small shops and vending machines where a bank card does not.
Before you fly
MTR Mobile
Free; most rides HK$5โ30
The official metro app: journey planner, fares, and โ most usefully โ which lettered exit to take.
Good for walking and the MTR. Download the territory offline before you land.
Better than Google for buses, trams and minibuses โ it knows the routes the MTR does not reach.
A Hong Kong data eSIM installed before you fly, so maps and Octopus work from the arrivals hall.
Before you fly
The Hong Kong Observatory's own app โ the one source for typhoon signals and rainstorm warnings that close the city.
Where Hong Kong itself rates restaurants. Better than Google for the small places, and it can take a queue ticket for you.
Klook
Free; usually a little below the gate price
Hong Kong-founded booking app. Skips the ticket queues for the Peak Tram, Ngong Ping 360 and Disneyland.
How Hong Kong messages โ hotels, tailors, tour guides and junk-boat operators all use it.