[Android, iOS] Free - Simple Gallery Pro (Android, expired)/Starlight: Explore the Stars (iOS) - Google Play/Apple Store

Another highly rated freebie for your Android devices. Has more than 80,000 reviews and is rated 4.7 out of 5!
Free at the time of posting.

https://play.google.com/store/apps/details?id=com.simplemobi… (expired)

Plus another nice freebie for your iOS devices.

Explore the Stars: https://apps.apple.com/au/app/id762002305

From the website: Simple Gallery Pro:

Simple Gallery Pro brings you all the photo viewing and editing features you have been missing on your Android in one stylish easy-to-use app. Browse, manage, crop and edit photos or videos faster than ever, recover accidentally deleted files or create hidden galleries for your most precious images and videos. And with advanced file-support and full customization, finally, your gallery works just the way you want.

ADVANCED PHOTO EDITOR
Turn photo editing into child's play with Simple Gallery Pro's improved file organizer and photo album. Intuitive gestures make it super easy to edit your images on the fly. Crop, flip, rotate and resize pictures or apply stylish filters to make them pop in an instant.

ALL THE FILES YOU NEED
Simple Gallery Pro supports a huge variety of different file types including JPEG, PNG, MP4, MKV, RAW, SVG, GIF, Panoramic photos, videos and many more, so you enjoy full flexibility in your choice of format. Ever wonder "Can I use this format on my Android"? Now the answer is yes.

MAKE IT YOURS
Simple Gallery Pro's highly customizable design allows you make the photo app look, feel and work just the way you want it to. From the UI to the function buttons on the bottom toolbar, Simple Gallery Pro gives you the creative freedom you need in a gallery app.

RECOVER DELETED PHOTOS & VIDEOS
Never worry about accidentally deleting that one precious photo or video you just can't replace. Simple Gallery Pro allows you to quickly recover any deleted photo and videos, meaning on top of being the best media gallery for Android, Simple Gallery Pro doubles as an amazing photo vault app.

PROTECT YOUR PRIVATE PHOTOS, VIDEOS & FILES
Rest assured your photo album is safe. With Simple Gallery Pro's superior security features you can use a pin, pattern or your device’s fingerprint scanner to limit who can view or edit selected photos and videos or access important files. You can even protect the app itself or place locks on specific functions of the file organizer.

Enjoy!