Promising but slows down

Downloaded it immediately after reading about this app in Business Insider, because I shoot some 2,000 photos per month and its a challenge sorting them out to save storage. So Ive always wanted an app like this. Now, having discarded 600 pictures from last month, the app began to slow down considerably and became rather uncomfortable (seemingly affecting other apps, too?). And I have hundreds more left to sift through, so this is a concern. Hopefully this gets improved in future updates. The idea is great and promising and, like I said, I need an app like this. Desperately.

Inextinguishable about Flic | Delete & Manage Photos, v1.0