iOS/macOS
Currently, the only way to free up space by FYI is to delete the app and re-install it.
In a future update we plan on implemeenting a setting that will allow users to free up space by clearing the app's cached data.
Android
To free up space on your phone, you can use the Clear Cache operation. This will delete data stored by FYI on your phone but keep the app installed on your device.
Navigate to Settings > Apps > FYI > Storage > Clear cache.
Note: It is imporatnt to note that the Clear Data operation will delete any data related to FYI including your saved encryption key.