Many years ago, I learned the hard way the dangers of not having backups for sensitive data. I also learned that computers need maintenance on both the hardware side of things and the software side. For the few years I had a full-fledged Windows PC, there was no one I trusted more than IOLO's System Mechanic. Later on, when I moved to Linux, that was no longer a viable option. I still keep an account with IOLO open for the sake of my roommate and a very good friend who still use PCs (the license covers multiple installations). IOLO uses an annual subscription model, frequently with promos and discounts that make the whole operation all the more "set and forget".
When I got my XPeria, I was surprised IOLO didn't have a stronger mobile presence to compete with McAffe and TrendMicro. What I came across instead was CM Security, short for Cheetah Mobile. My experience with them has quickly shrank from mostly favorable to downright annoying.
I'll save my current stance on the subject of blocking ads for another entry, but I will give a small sample here. I understand that ad-support is sometimes necessary to maintain a business model. I don't mind pay-walls for added features. What I absolutely can't understand is making the ad-support option compulsory. CM is by and large free to use. I get ads on my phone, which I was okay with. However, the ads got out of hand, showing up at every corner, in front of every feature, and the worst part was I had no way out of it. Yes, CM was expanding its features, meaning more revenue required, meaning more ads. Here is my problem: there's no option for me besides walking away.
I don't mind paying for apps.
I don't mind paying regularly for apps.
I have a rule against spending real money on Free-to-Play games, but something like an anti-virus or a CPU cooler or a junk organizer is a completely different kettle of fish. Those are useful. Those need constant updating. Those need regular support.
I am completely and utterly content to pay to keep my phone optimized.
Cheetah Mobile, however, did not give me any option to pay them.
As such, I'm using someone else now. I won't say who on the off-chance they turn out worse, but so far they seem far more willing to give me options than CM.