Yes, it is possible to download custom maps for Minecraft Pocket Edition. Custom maps can be a great way to experience new and interesting game worlds created by other players or even yourself. Here's how you can download custom maps:

Find a custom map that you want to download. There are many websites that offer Minecraft Pocket Edition custom maps for free download. Make sure to download the map from a reputable website.

Once you've found the map that you want to download, tap on the download link. The map will likely be downloaded as a .zip file.

Extract the files from the .zip file. You can do this using a file manager app on your device or by using a desktop computer. Extract the files to a folder on your device.

Open Minecraft Apk Pocket Edition from apkinu.com and tap on the "Play" button. From there, select the "Create New" button and set the game parameters to your liking.

Once you're in the game, tap on the "Edit" button and then select "External" from the menu. This will allow you to access the folder where you extracted the custom map files.

Tap on the folder containing the custom map files and then tap on the "Select" button. The custom map should now be loaded into your game and ready to play.