Great app but fills disk with iOS10

I love the app. I regularly empty the cache. But since a iOS10 cleaning the cache seems not enough. The storage used by the app grows and grows.

I have to delete the app from time to time and wait until iOS cleans the storage before I reinstall it. Unfortunately I loose my favorites when I reinstall the app.

mscharf about imgTumble for Tumblr, v2.3.4