Ask HN: Building spreadsheets for the mobile era, is it worthwhile?

I have been thinking about a spreadsheets like app that gives you a minimal but required functionality with an ability to share built in. Consider a monthly spends you want to keep, or the say a list of things (along with their prices) you bought for a shared home and you want to share it with your room mates. I think having a excel spreadsheet might solve this for you, but its too cumbersome. Even though there are apps that track specific things like monthly spend (through sms) or split bills, I guess I need something a little more generic where I could keep track of everything. Do you feel it's an overkill, or building something actually might help someone.