In practice
Four screens worth capturing
You do not need a statement export. The views you already use contain more than enough.
The subscriptions view in your banking app
Most banks now group recurring payments on their own screen. This is the richest single source, because it catches charges made directly by card rather than through a store.
App Store or Google Play subscriptions
Everything billed through the store sits here, including the ones you set up years ago on a device you no longer use.
PayPal automatic payments
A separate world again, and the one people most often forget they have.
An e-mail receipt
Useful for a single service you suspect but cannot find elsewhere — the receipt usually carries the amount and the renewal date together.
What to crop
Balances, account numbers, the last four digits of a card, anything belonging to someone else. None of it is needed to list a subscription, so none of it should be in the frame.
Start with the questionsAbout a minute