iOS app: filter/sort films by your own rating
Alternatively to be able to sort watched films by your own rating. Or both.
Garrett Foster commented
The Letterboxd iOS app is nearly perfect, but one feature I (and I suspect others) might be interested in is the ability to sort your films by the star rating YOU give them, much like you're able to do on the LB website. As it is right now, you can only sort by the films' average rating on Letterboxd. I think being able to sort by your own star rating would be a good way to compare the experiences you had with films that you gave the same rating to.