Introduction
a:Drake is a free application for Android devices (Android 9 and newer) designed for paperless geocaching.
If you wonder where the name came from, here is the explanation: cacher in Czech sounds like “kačer” and it is a male duck, i.e. drake 
a:Drake is designed for off-line work, i.e. without an internet connection. It's possible to download data on-line, but this possibility is meant as a tool for quick updates, not as the main way of using the program. Cache data is downloaded via the Geocaching API, which means the user has to be a Premium Member to use this feature without significant restrictions.
Since version 6.15 a:Drake also has a companion app for Wear OS watches – navigation to the cache right on your wrist.
News, questions and bug reports: a:Drake discussion on the geocaching.cz forum (in Czech, English posts are welcome too).
Screenshots
Screenshots come from older versions, the current look may differ.
Features overview
- finger-friendly
- database of geocaches and waypoints (not included)
- database fully compatible with GeoGet, data transfer over Wi-Fi (GeoGet Sync)
- can handle huge data volumes, tens of thousands of caches (plus waypoints)
- complete cache information
- coordinates, terrain and difficulty, distance and direction
- attributes
- listing (original HTML), images for off-line use
- list of assigned waypoints, projection, formula solver
- logs
- own notes
- own log as a draft (Field Note), with images
- navigation to cache or waypoint
- compass, proximity alerts, radar
- navigation on a Wear OS watch
- drafts (Field Notes) and on-line sending to the website
- customizable text of log, include time, note and sequence number
- map
- on-line maps (OpenStreetMap, Mapy.cz, Google etc.) with automatic saving for off-line use
- custom map sources, off-line raster maps in SQLite format (e.g. created by Mobile Atlas Creator)
- Mapsforge vector maps (OpenAndroMaps etc.) with themes loaded directly from ZIP archives
- map rotation by direction of movement
- details in the technical description of maps
- trackables (inventory, own, watched), logging
- GPX import and export
- track recording, export to GPX, KML, PLT