Keep the tips you learned the hard way.
Figure it out once.
Use it next time.
Keep notes, photos, and personal markers for places.
Hobocode is a location notes app for iPhone.
Leave a note for each place.
The parking entrance, what to order next time. Write down what you’ll need when you’re back.
Parking
Entrance is behind the building.
B2 is less busy.Oct 3
Hangil Jeongol
For two: small hot pot + one fried rice.
Aug 15
Café Sodam
Latte, less sweet.
Sit by the window next time.Oct 14
Department store
Restrooms behind the escalator are quieter.
Sep 28
Community center
Wednesday class: 3rd floor, room 302.
Sep 9
Walking route
Take the riverside on the way back.
Oct 1
Back again?
Your note says hello.
- Turn on a place alertSet an alert radius for each saved place, from 50 m to 500 m.
- Come near it againHobocode checks whether you’re inside that radius.
- See your noteOpen the app from the notification to read your notes.
Location and notification permissions are required. Set location access to “Always” for alerts while the app is not in use. The example below hides note text, as the default setting does.
English notification example · simulated arrival at Ferry Building, San Francisco
What it looks like in the app.
Actual screens in English. The app currently supports Korean, English and Japanese.
HomeShows the notes you left near where you are now. 
MapFind your saved places on the map. 
Place alertTurn on alerts and pick a radius for each place. 
NotesRead and edit a note alongside its place and map. 
Your own markChoose a mark that fits your note. 
Getting startedAn introduction to leaving notes at places.
Captured on October 19, 2026 from a development build at a simulated San Francisco location. Ferry Building is a real public place; notes are fictional planning examples, not a visit review. Onboarding uses the app’s built-in fictional example. Screens may differ slightly from the current version. Map and notification features do not work on this website.
Explore the app in English
Before another lap
around the block.
Download on the App StoreHobocode for iPhone is now on the App Store.