Fairly useless. There is no way of finding a specific photo or subject. Photos can be sorted by date taken or date uploaded. That's all. I have a lot of scanned photos uploaded so the upload date has no relevance to the photo contents. In effect the app is just a jumbled box of pictures. I used it because it's free with Prime but I wouldn't pay a penny for it. Edit: support is a joke too, an email to the developer address shown here just gets a reply that they are not accepting emails.