Two things can improved;
1. If you sync data to/from a google spreadsheet fied that has user validation set up, it is ignored. Being able to set up user validation makes it a lot easier to enter data in the google spreadsheet and then sync it to memento, thus improving the workflow.

1. If you link memento to a google spreadsheet then you cannot filter the spreadsheet any more. Easy filtering the memento data in the google spreadsheet gives a better overview over the data than filtering in the app plus adds the possibility to use multiple filters and sortorders.