The app

Offline field notes.

GeoJSONic is a field journal for places. It runs on iPhone, iPad, and iPhone Duo. You write the note where you stand. The note stays on the device as GeoJSON. There is no account and no ads.

Download GeoJSONic on the App Store

Capturing field notes at the crosshair, with quick actions for photo, audio, and starting an activity — A note at the spot where you are standing.

What you write down

A field note can hold the words, photos, and a voice recording from that place. You can record a route while you hike, bike, or drive. You can walk a boundary and keep the acreage with the note. On a wide screen, including iPhone Duo and iPad, the notes and the map sit side by side.

The free app includes notes, routes, areas, and an online globe. Pro is $3.99 a month, with the first month free, or $39 a year. Pro adds offline map downloads, satellite imagery, place search, multi-stop trip planning, turn-by-turn directions, and PDF field reports.

Ways to use it

Walk a property line and keep what you saw with the note. Property line notes

Write what you see on a job site, with a photo, a voice note, or the walk. Job site notes

Keep a personal log from a hunt. Hunting notes

What it is not

It is a personal log for field notes and trips. It is not a trail catalog, and it is not a land-ownership map. Download maps before you lose a signal. Place search, weather, and new directions need a connection. GPS capture itself does not.

Keep reading

The desert story is on the homepage. Essays from building the app are in Field Notes. Handing a note to someone else, with no server in the middle, is the Sneakernet.