If the download did not start automatically then download the APK file manually from the direct link. Ad blocking plugins may not let you download the file, so please disable them before downloading. Flutter UI Challenges 3.1.35 (com.popupbits.flutteruichallenges).

How to install APK and XAPK (ZIP) packages
If you only have APK file - just do the step 3.
XAPK is a ZIP archive of both APK file and OBB data file for big size games bigger than 100Mb. If you do not have xapk-installer you can do the following steps:
1) if you've got XAPK file - rename it to ZIP extention.
2) Unzip it to your hard drive. Now you should have APK and OBB files.
3) Copy and install APK file to your Android device.
4) Then copy the .obb file named 'com.gameXXXXXXXX.obb' into required location:
/SDCARD/storage/emulated/0/Android/obb/com.gameXXXXXXXX/

Note: Connect your android device to computer USB port using USB cable in order to transfer .apk and .obb files.

Please note that APKDom.com only shares the original and FREE apk packages WITHOUT ANY cheat, crack, mods, unlimited gold patch or any other modifications from GooglePlay AppStore. All android apps and games here are for personal use only. If any apk download infringes your copyright, please Contact Us. Flutter UI Challenges 3.1.35 is the property and trademark from Developer PopupBits, all rights reserved.