Quarterly, or yearly trends for utilites.
Right now I have to do this on my own, but it would be great if you had a spending analizer that could show trends in how much user based utilities, such as gas, electricity, and sewer change over time. Basically I know it costs more to heat my house in the winter with gas, but it would be fantastic to be able to give averages and trends to suspected roommates so that I know they are figuring that in when the agree to live with me. Also, though my suggestion is different than your matching suggestion of "editing future dates and quarterly bills", i do think there suggestion is a great one.
Jon
shared this idea
This isn’t really a core Splitwise feature. We do have an API for third parties to use to develop related apps at dev.splitwise.com that could be used to put this together. It’s possible we might do something similar with monthly spending graphs in the future that could be used to get this kind of information.
Marshall