[Quot]

I used StreetComplete when I had an Android phone. It looks for missing data near you, and gives you a really nice interface to input that data.

They are working on an iOS build, and I can't wait to start using it again.

https://github.com/streetcomplete/StreetComplete/

Edit: Also, OSM has a few wiki pages for editing software on different platforms.

- Android_apps_that_can_upload_changes_to_OSM - https://wiki.openstreetmap.org/wiki/Category:Android_apps_th...

- Android_apps_that_can_record_GPS_tracks - https://wiki.openstreetmap.org/wiki/Category:Android_apps_th...

- IOS_software - https://wiki.openstreetmap.org/wiki/Category:IOS_software

- Mobile_editors - https://wiki.openstreetmap.org/wiki/Category:Mobile_editors