CallHero is described as 'Phone answering solution designed for small businesses of every kind. The way that CallHero works is that if you have an incoming call instead of it going straight to your phone ringing it goes through our customizable automated AI-powered secretary' and is an app. There are more than 25 alternatives to CallHero for a variety of platforms, including Android, iPhone, Web-based, Android Wear and F-Droid apps. The best CallHero alternative is SpamBlocker, which is both free and Open Source. Other great apps like CallHero are Yet Another Call Blocker, Truecaller, Sereniphone and Silence: Block Unknown Callers.
SMS Shield is a Machine Learning-based SMS spam filter for iPhone. We trained it on what spam SMS looks like by showing it tens of thousands of spam SMSs beforehand. SMS Shield then learns and, to a high degree of confidence, can identify spam even it haven't seen it before.
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