@66bookssss I have a google spreadsheet where I simply record every action I take. Every deposit, withdrawal, buy, sell, dividend, split. I note the account it relates to as people can own the same stock in different account types.
Then you can use queries to pretty much filter and figure out anything you want. Every week it just takes a few minutes to record everything but it works a treat at tax time for verifying what has happened.
That said, wealthsimple seems to provide fairly accurate slips in the app. When I checked the ones I got against my records most items were perfect or only a few cents different which is good enough for me.