depends what stocks you want to buy. self wealth don't have access to otc markets.
May I recommend CommSec ?
everyone hates the fees they charged to place trades and get position. but I never had an issue about the app / website being down, my trades always go through , get app etc .
I guess it's true pay peanuts you get monkeys.
self wealth app is hard too use I don't like it .
still use to and do day trades on asx . make sure you registered a different hin if you already have another account with another firm it doesn't hurt