Use Unity 2018.4.17f1 or higher
Get Android build support & iOS build support installed
To deploy to Android
Target Android API level 22 or higher
Using .NET 4.x or equivalent (build settings / android / configuration / scripting runtime version)
To deploy to iOS
Xcode 10 or higher
iOs 8.4 or higher
Be sure that Metal Editor Support checkbox is disabled in unity/playerSettings/OtherSettings/rendering
Use the link below to download the Unity package for the Palmup Ads plugin
Open your project in the Unity editor. Select
Assets > Import Package > Custom Package and find the
PalmupAds-vx.x.x.unitypackage file you've downloaded.
Click 'Import' at the bottom-right of the window that show up.
You should see the PalmupAds folder in your Assets folder as below