I think banks should implement a feature where you can navigate to a tab on their website that shows you all repeating charges you have been paying for, maybe even giving estimates of total future cost. This would be very easy for them to implement. I have written to my credit union suggesting this.
This is one advantage of having an app-store manage my subscriptions - I am the person who forgets what all I am subscribed to.
A number of credit cards have apps/websites with recurring charge trackers. As much as I love credit unions, they don't do 2-5% cashback, so it can be wise to stack recurring payments onto credit cards for benefits.
HSBC in the UK does something like this. It detects the regular monthly outgoings from your account, like bills paid by Direct Debit or other regular payments, groups them by whether they’ve been paid yet this month or not (based on the date that you entered as your payday) and estimates what your remaining bank balance will be after the bills are all paid.
This is one advantage of having an app-store manage my subscriptions - I am the person who forgets what all I am subscribed to.