I accidentally found out about the most convenient program for a mobile phone, called «Coins of Tsarist Russia», developer Trion, installed from Google Play. Naturally a complete catalog of coins of the Empire, which can be installed on your mobile phone. I installed it on Android, I don’t know about iPhones.
The free, stripped-down version leaves out all the earliest and most delicious things and begins only from the reign of Alexander II. However, in just a heel of the green you can open all other sections, starting with Peter I. In addition to the database, the catalog contains additional functionality. It consists in the ability to keep track of cash coins in the collection. While crawling through the catalog, you can mark which coin carriers you already have, and then even display the entire list in the form of an Excel table.
Just imagine, being in the field you can estimate the value of the find. All rare coins are marked in yellow, undoubted rarities — red. A sophisticated numismatist may find fault with an inaccurate price list or the absence of something there. In general, a very useful thing!
Kameraden, what other necessary programs would you recommend for your phone?
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