F-Stop Media Gallery
F-Stop Media Gallery 
Replace your clunky stock gallery with alight weight, fast (even fun) gallery that works with you to organize all the photos and videos on your device. F-Stop is an alternative image gallery app that provides you with professional tools and a clean, material-inspired UI to minimize effort and maximize organization.
• Fully optimized for Android 5.0 (Lollipop) including material design
• Instantly search through all your photos to find results based on file name and metadata such as tags          and camera model
• Browse your media on a map with an integrated Google maps experience
•    Save tags (keywords) and ratings[1] in XMP format so they staywith the image and can be read by                popular programs such as Lightroom, Picasa, Aperture, Windows Live Photo Gallery, digiKam and many        more
• Read metadata directly from your images (EXIF, XMP, IPTC)
• Custom sort images using drag and drop
• Choose one of the many themes to make F-Stop look the way you want
• Nested folders[1] let you browse your media using the folder structure instead of the typical flat view
• Access your favorite tag, folder or album with Bookmarks
• Select a couple rules and let Smart Albums update automatically based on them
• Exclude folders easily to get rid of album art showing up in your gallery
• Play animated GIFs
• Share and/or edit with popular apps like Snap seed, Whatsapp, Facebook, Twitter, Flickr and more!
• Hide images and videos from other apps with password protection
• Slideshow mode with popular transition types

New library for GIF images to improve compatibility
New library for saving metadata
Set as wallpaper functionality
Added drag to select like Google Photos
Changed to material scroll bar
Added ability to rename bookmarks
Can now pin albums and tags to the top
Show/hide folders by adding/removing .nomedia file
Added notification to save metadata after rating/tagging/setting favorites
Couple of fixes and tweaks

The app was not found in the store. 🙁