The AA 4th Step app, also known as "Vault," is a secure and convenient way for members to enter their 4th Step Inventory information. Developed by 12 Step Apps LLC, this app allows users to complete their inventory by column or row, with prompt lists for jogging their memory for people, principles, and institutions. Users can type or speak their answers and easily check-box answers for "Parts of Self Affected."

One of the standout features of the AA 4th Step app is its 100% Vault Secure system. All data is stored securely on the iPhone itself and nothing is stored in the cloud, ensuring the information remains safe from potential hacks. The app also offers a "Set Daily Reminder" option using iPhone push notifications, making it easy for users to stay on track with their inventory.

Once completed, users have the option to email their inventories to themselves or their sponsor in PDF format. Additionally, they can print the inventories out in a horizontal spreadsheet style for easy reading and organization. The app even allows users to handwrite any additional inventory information they want in empty rows.

It's important to note that the AA 4th Step app is not AA reviewed or approved, as AA does not endorse or approve anything or anyone. However, this app was created by members for members, and thanks to their generous support, it is available for free worldwide. The primary purpose of the app is to provide a convenient tool for individuals to work on their 4th Step anywhere and anytime they are free and in a safe place.

For those who prefer to write out their 4th step with pen and paper, the app can still be utilized to collect inventory information, which can then be printed out and copied over by hand. Overall, the AA 4th Step app offers a secure and user-friendly solution for individuals working on their 4th Step Inventory, allowing them to focus on their sobriety and helping others.