Clue Tracker is a letterboxing app that is compatible with both Atlas Quest and LbNA. Clue Tracker was created by MichKathy and TrailMark (Pearl Crescent).

Features:
- Find nearby boxes based on the current location of your iPhone, iPod touch, or iPad.
- Find boxes by location, name, or box ID.
- View detailed letterbox information including last found date and series details.
- Show letterboxes on a map and get directions to a box.
- Built-in compass display (device support required).
- Record finds.
- Save clues and other letterbox information for offline use.
- Organize saved letterboxes into your own lists and reorder boxes to create custom itineraries.
- Share a list of saved letterboxes with another Clue Tracker user (or transfer the list to another iOS device).
- Sort/filter search results and lists of saved letterboxes.
- Set or modify the location of a saved box.
- Add Word-Of-Mouth (WOM) letterboxes.
- Add your own photos to saved letterboxes and WOM boxes.
- Add personal notes.

Requirements:
- Compatible with iPhone, iPod touch and iPad. Requires iOS 8 or later.
- Available on App Store.

There is a Clue Tracker AQ Forum where you can ask questions or make suggestions.

BoxFinder is another iPhone app for letterboxing, but was officially discontinued in July 2016.

MichKathy and TrailMark created a Clue Tracker app for Android. It is similar to the iOS app; more information is available on the Clue Tracker website and on Google Play.

There is a Clue Tracker AQ Forum where you can ask questions or make suggestions.

There used to be Box Radar for Android, but that app has been discontinued and is no longer available.

Sorry, but no, there are current no native BlackBerry apps for Atlas Quest at this time. If you are interested in developing one or know someone who is, please have them contact Green Tortuga to access that AQ API.