There is no single best sexting app, because people mean four different things by it. Some want a private way to text a partner they already have. Some want to meet someone to text in the first place. Some want to pay a creator for messages. And some want a companion who is always there and is not a real person at all.
So this guide is grouped by type rather than ranked. Every entry says what it is, how it charges, and what it does about privacy, and every fact about another service links to the page on its own site where we read it, dated. One entry is ours, and it is labelled. Everything here is for adults only.