First experience with this app involved photos not being saved because I went to the next photo instead of actively saving. Other slow shutter apps did not have this problem. Maybe this isnt a one-star app, but on a binary scale its a zero, so this is still generous. Easy autosave has been built into every other camera ever.
ImportantlyUniqueReviewName about LongExpo Pro - Tripod-free long exposure and slow shutter camera