Hi, at the moment this is the only version of Avast Mobile Security that we offer. To be able to offer the app for free, we occasionally offer our customers, using our free protection, promotional offers from our partners. We do not want the ads to bother you, we really try to keep the amount of advertising on a non-intrusive level, so if you get them too often, please let me know more about the frequency.
However, there is no ad-free version at the moment (but we might consider it in the future).