When comparing AntTek Explorer Ex vs A Photo Manager, the Slant community recommends AntTek Explorer Ex for most people. In the question“What are the best file explorers on Android?” AntTek Explorer Ex is ranked 13th while A Photo Manager is ranked 17th. The most important reason people chose AntTek Explorer Ex is:
The Holo like UI looks nice as well as operates fluidly with all of the built in features such as the dual pane view.
Specs
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Pros

Pro Beautifully designed
The Holo like UI looks nice as well as operates fluidly with all of the built in features such as the dual pane view.

Pro Themes
AntTek Explorer Ex has light and dark themes built into the app as well as support for outside themes.

Pro It can zip and unzip
AntTek Explorer Ex has built in .zip file support for compressing and .zip and .rar support for uncompressing files.

Pro Can browse network and cloud files
There is no need to connect a phone to a computer via USB nor a reason to keep all files on the device itself.
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.
Cons
Con SMB support is limited and speed is an issue
SMB support has trouble with larger files. The app also has speed issues when navigating.
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
