DO NOT DOWNLOAD THE APP!!!!
I used the app once or twice and it seemed to work well, but I opened it this morning and immediately I started getting smses that payments were coming off of my account, within 5 minutes almost R20000 had been stolen out of my account. I immediately froze the account. I haven't had any confirmation from Standard bank yet that the App is insecure, but it was just too much of a coincidence that as soon as I opened the app my account started being debited.
I recommend that no one use the app until Standard Bank confirms that it's secure enough!!!