Just deleted the Whisper App from my Android phone and recovered over 2.5 GB worth of space.
Had been battling with low storage space warnings for the past 2 weeks and never thought that the Whisper App would be the culprit. I believe it constantly downloads the full image whispers in the background not just the text portions for notifications and that process kept chewing up the meagre 4.5gb of my remaining internal storage space. I removed apps I use on a constant basis but the space kept filling up.
Glad to be rid of the app though. It was getting boring to read all those anonymous posts that were not that interesting if you are not into gossip.