Boost your mobile site's revenue with app wall ads in addition to Adsense

I use the plugin (Boost your mobile site’s revenue with app wall ads in addition to Adsense) version 1.0.1 for the last 3 days now. Although I see the impressions on my dashboard, I can’t see the ads on my mobile (except google ads I use). Do I have to have a special mobile theme?

https://www.ads-software.com/plugins/interstitial-app-wall-ads-for-a-better-mobile-monetization/