Decide what the inventory is for
An app list tells you what is installed on a device. A digital inventory goes further: it records the services and accounts you use across devices, including ones you access only through a browser. It can help you find an account when you change phones, review recurring payments or decide whether you still need a service.
Start with a small, consistent set of details for each entry: the service name, its purpose, the email address or sign-in method you use, whether it has a paid plan, and its status. Useful status labels include active, rarely used, canceling and closed. You can also add a short note about where important files or purchases live. Leave passwords, backup codes and answers to security questions out of the inventory; those belong in a more secure place designed for sensitive information.
Gather accounts from several places
Begin with the services you can name without looking anything up: email, cloud storage, messaging, banking, shopping, entertainment and work or study tools. Then check each phone, tablet and computer for installed apps. An installed app is a clue, not proof that you still have an account, so confirm its status before adding details.
Next, search your email for welcome messages, sign-in notices, receipts, renewal reminders and cancellation confirmations. Review your device’s subscription settings and the services connected to any sign-in account you use, such as an account that lets you continue with a single tap. If you use a password manager, its saved entries may reveal services you have forgotten. These checks may overlap; that is useful because one source can fill gaps left by another.
As you gather entries, mark anything uncertain rather than guessing. For example, “account may still exist” is more useful than labeling a service closed based only on the absence of its app. You do not need to finish the entire inventory in one sitting. Cover your most important accounts first, then add older or less-used services as you encounter them.
Choose a format you will maintain
A spreadsheet works well if you want to sort by category, status or payment type. A notes app can be enough for a shorter list. Either way, use one row or entry per service and keep the field names consistent. A practical set is: service, category, sign-in identifier, sign-in method, payment status, last reviewed and action needed. If a service has separate personal and work accounts, give each its own entry.
Make the inventory easy to find but not easy to expose. An entry showing that you use a service may still reveal personal information, especially when paired with an email address or billing note. Use the access controls available in your chosen tool, and avoid sharing the list broadly. If you keep an offline copy, think about where it will be stored and how you will update it. You can record that multifactor authentication is enabled, but do not put recovery codes in the same document.
Turn the list into a manageable review
Once the entries are in one place, look for duplicates, unclear charges and accounts you no longer recognize. Check a service directly before changing a subscription or closing an account. Some services may hold files, purchase histories or messages you want to keep, while others may be tied to sign-ins elsewhere. Note any download or transfer you intend to complete before closing an account.
Give every unresolved entry a next action, such as “confirm billing,” “check stored files” or “update recovery email.” This keeps the inventory from becoming a static collection of names. Prioritize accounts that hold important information or control access to other services, including your main email and cloud storage accounts. For those, verify that your listed sign-in details are accurate and that your recovery options are still accessible.
Keep it current with a light routine
An inventory is most helpful when it reflects your habits now, not when you first made it. Add a new service when you create an account, change its status when you cancel, and note when an account is fully closed. A quick review alongside another recurring task, such as checking subscriptions, can catch entries you forgot to update.
Do not aim for a perfect record of every app you have ever opened. Focus on accounts that store data, cost money or matter to your daily setup. With a consistent format and a small maintenance habit, the inventory becomes a practical map of your digital life rather than another file you have to organize.
