*(note: I know this is an old post but it came up in a search result and I thought I'd update it)* **For those looking for an app** I suggest you can use [maps.me](https://maps.me/). It's available on Android and IOS, uses OSM data, makes it easy to add POIs (which you can then "star"), and naturally it's open-source and [available on Github](https://github.com/mapsme/omim).

*(note: I know this is an old post but it came up in a search result and I thought I'd update it)* **For those looking for an app** I suggest [maps.me](https://maps.me/). It's available on Android and IOS, uses OSM data, makes it easy to add POIs (which you can then "star"), and naturally it's open-source and [available on Github](https://github.com/mapsme/omim).

**For those looking for an app** I suggest [maps.me](https://maps.me/). It's available on Android and IOS, uses OSM data, makes it easy to add POIs (which you can then "star"), and naturally it's open-source and [available on Github](https://github.com/mapsme/omim).