Stone Keeper

Build a private, visual catalog of the rocks, minerals, crystals, fossils, and other geological finds you collect. Photo comparison in version 1.0 covers five types only: calcite, chalcopyrite, fluorite, granite, and marble. This experimental feature makes a best-effort comparison and may be wrong, return no identification, or show several possible alternatives. Suggestions have low evidence and are never a definitive identification. You can always save a find as unidentified. Other rocks, minerals, and fossils can be collected, but are not covered by this photo comparison. Stone Keeper helps you: • add one to three photos of a find • record the date, a broad place label, notes, and simple observations • organize finds in a visual cabinet and timeline • search, favorite, edit, and record where the physical specimen is stored • compare photos on device with bundled reference specimens…