When comparing A Photo Manager vs Dir - Open Source File Manager, the Slant community recommends A Photo Manager for most people. In the question“What are the best file explorers on Android?” A Photo Manager is ranked 17th while Dir - Open Source File Manager is ranked 19th. The most important reason people chose A Photo Manager is:
i.e. all photos that where added/modified since last backup can be added to a zip file on an attached usbstick
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Incremental photo backup to zipfile
i.e. all photos that where added/modified since last backup can be added to a zip file on an attached usbstick
Pro Support for virtual albums
... that are independant of locaton in the physical-filesystem.
Pro Powerful geotagging/openstreetmap integration
A map shows where photos where taken. if you zoom in you see more details. Geotagging: select one or more photos + "set geo" + pick a point in the map ==> the selected images get that point. Filter images through the map: after selecting an area in the map (i.e. North Germany), the gallery will only show images from North Germany.
Pro It is free
Open-source, no ads, no user tracking.
Pro Can handle big image collections
15000+ images in 1000+ folders.
Pro Find photos by tags (aka keywords)
Pro Build in Vault mode
If enabled only selected/filtered Images can be seen. This allows you to savley hand over your android phone to someone else and allow him/her to view only those images in Gallery-View, Geographic-Map and Image-View that you have chosen before.
Pro Exif-Tag support (Edit and Find)
Pro Quick hirarchical folder navigation
Only folders that contain pictures are shown.
Pro Light on resources
The app doesn't take up much storage space; dark mode serves as a battery-saver.
Pro Privacy-focused
This app doesn't collect any of your private data and it doesn't require any unnecessary permissions.
Cons
Con It is not available on the Google Play Store
You have to download it via f-droid.org store.
Con Only support for local photos
Con Out of date
Latest commit on Mar 26, 2018
Con Very Basic
It has basic features only. You can copy, paste, move files but no root explorer, SMB etc .