I highly recommend TapForms if you don’t already have a method for keeping track of your pen and ink collections. You can secure the database with a password, which is especially useful if you keep it on your iPad or on a computer accessible to others.

For computers, TapForms is Mac only, but if you own an iPhone or iPad, there’s a stand-alone app. If you own both a Mac and an iPhone/iPad, you can sync your data across all devices (and you can even have it on your Apple Watch if you like).

The iPhone/iPad app is $16.99, and you can download it from the App Store here. The Mac app is $49.99, and you can purchase it directly from TapForms (or download a trial) or purchase it in the Mac App Store here.

(I purchased TapForms for Mac and iPad with my own funds.)