For home I do agree that the online site is better via computer, but for me an app for the phone is beneficiary because of ease of access and also if developed nicely, it would make navigation to features quicker and easier, and also facilitate multitasking better because of less resource and network usage on the phone. In my experience dedicated apps are usually more stable and are less prudent to stop functioning or loosing connection while busy with something else. And since most apps saves a alocated cache the page loading is also quicker which improves swiching between pages and functions than the browser loading every page from scratch, especially after a browser cleanup or cookie and cache relief. But... This is just my personal opinion and preference. It might be different for every one