Spliting expense per day basis.
We have been using Splitwise for quite a while now. This is the situation that we have to deal with:
One of out roommate has a job where he has to travel so often and usually he just stays 3 days a week at home.
Now, portion of the rent is clear: pay whatever the share is.
But for other shared expenses like groceries, utilities we account him for the number of days he stayed.
Which lead us to formula: calculate one day amount for all shared expenses total monthly expense and dived ( no days one stayed * expense per day).
Is there anyway we can get it done on Splitwise?
Seconds,
Is there anyway you can lock the past expenses?
For ex. Admin or Group admin (whatever you may want to name it) has write to lock the group so no one can add expense to it?
You guys have done great job.
Thanks,

We have added expense by shares in the website interface, so you could now split your utilities by shares for each day you are in the apartment.
We will not be adding admin or locking controls to the group, though you can register for emails on expense changes in your account settings if you are worried about housemates cause issues with this. We also track deletions.
Marshall