For slabs, i use and prefer over anything else NGC's Registry data base. You can even add front and back pics, descriptions, etc. For my other coins, i sometimes write where i got the coin, when, and how much on the 2x2 or a sticker somewhere. I dont know why i do this since most coin purchases i make dont involve a recepit, so the numbers im recording could all very well be ficticious. It seems like a bit of a crapshoot, the more organized i try to be. I made an excell sheet with raw, graded, and other sections and filled it in a little. But for some reason i havent been updating it regularly
The above about NGC's Registry data base reminds me of the same thing at PCGS. I have a few Registry Sets at PCGS and list a good bit of my inventory there.
Its called "coin collection" and in your app store or Google play it has a cover photo of a Lincoln Cent and I can update my collection on the spot as I buy... I love it
I've tried several different methods and have finally settled on CoinManage. At first I used an Excel but it's difficult to track the value of your collection, just the purchase price. Should something happen to the collection I'd like a rough, easy to grasp, value for insurance purposes. The NGC tool is pretty good except you can't list bullion and mint/proof sets. I've been using CoinManage for about two weeks and here are my thoughts. Upside: - Excellent database with regularly updated values - Once you get the hang of it, pretty easy to use - Extensive reporting features - Flexible in that you can add a coin manually if it's not list Downside: - Not the most intuitive software to use. There are some YouTube tutorials that are extremely helpful. Bottom Line: CoinManage is the most comprehensive software I've found at a reasonable price. Once you get the hang of it, you're GTG.
I use an Excel sheet, which works well for me and helps when I shop. I t is pain to update, particularly coin prices. However, I would like to set up a software program that can periodically and automatically update prices or values and history for various coins or sets. With coin values or bid-ask data coming from various sources, it would be great to create a program using Big Data techniques to display values of a coin or set and their history and also try to determines trends in value.
I'm with @hotwheelsearl I also have CoinManage. http://www.libertystreet.com/Coin-Collecting-Software.htm
the only downside is that you have to pay every time you update to the newest year (to my understanding)