Clue Tracker is the ultimate letterboxing app for iOS. Quickly and easily find Atlas Quest and LbNA boxes, organize clues, view maps, record finds, and more.

• Find nearby letterboxes based on your current location.
• Search for boxes by location, box name, planter, box ID, and much more.
• View detailed letterbox information including last found date, series details, and comments.
• Show letterboxes on a map and get directions to a box.
• Built-in compass display (device support required).
• Quickly and easily 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 and filter search results and lists of saved letterboxes.
• Change the location of a saved letterbox.
• Add Word-Of-Mouth (WOM) letterboxes.
• Add your own photos to saved boxes and WOM boxes.
• Add personal notes.

Are you new to Letterboxing? Learn more about this intriguing activity at or

Pearl Crescent and Clue Tracker are not affiliated with Atlas Quest or LbNA.

What’s New

Version 4.0.4

• Added a warning message that is displayed if the Atlas Quest search limit is reached during a search.
• Added support for three Siri Shortcuts (Find Nearby Boxes, Find Nearby AQ Boxes, Find Nearby LbNA Boxes). To add a voice shortcut, first use Clue Tracker to perform the kind of nearby search for which you want to add a shortcut two times and then go to “Siri & Search” within the iOS Settings app and tap “All Shortcuts”.
• Improved how Clue Tracker determines whether a box location is exact or approximate.
• Improved compatibility with recent versions of iOS.

Ratings and Reviews

4.7 out of 5
176 Ratings

176 Ratings

Flwr53 ,

Great app

I’ve been using this letterboxing app for at least 4 years and have never had any problems. It’s so convenient when traveling to pull up a quick search for nearby boxes. I also like the save feature so you can download the clues for later viewing in an area where you know there won’t be cell service. I like being able to log the find from the field.

Glitch?? ,

Love it!

Helpful to have the clues at hand, all together, and sorted however you want them.

MITREite ,

Great App and much needed update - thank you!

This is the best app for letterboxers! Thank you so much for the recent update and the iPhone X support.


Pearl Crescent LLC
10.8 MB

Requires iOS 8.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Rated 4+
© 2019 Pearl Crescent LLC


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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