I think I found an issue but not major but could be a deal breaker for me at least...
Add me to the list of using this CR app (Call Recorder - SKVALEX) and I too used to use ACR and it worked great on my S5 but not on my new Note8. At the time I was using BoldBeast on my Note8 since none of the other apps were working consistently. That's the key, I need it to work consistently and have the peace of mind that it's always working like it should. At the time, I actually did a search for BoldBeast and came across this thread for CR. BoldBeast seems to be working fine but the trial only lets you record 30 seconds of every call until you upgrade to the paid version. So I uninstalled BoldBeast and tried this one, plus this one has a nicer interface and I think more options. And CR is working great EXCEPT when using the MUTE button (and I'm still on the trial version of CR btw, so maybe this has something to do with it???)...
So far it has recorded every call BUT I think I found a bug and I emailed the dev last night and haven't heard back yet. Apparently this app kills the audio from BOTH sides if you press the MUTE button. It still keeps recording but I can't hear the other person. The problem has been very inconsistent, sometimes it continues to record the other person and sometimes it doesn't. ACR never had this issue when I pressed the mute button and neither did this app until last night. Like I said sometimes it happens and sometimes it doesn't but I emailed the dev a sample recording where I pressed mute on and then off every 5 seconds and the recording was automated on the other line so you can hear it, then you can't, then you can and then you can't again throughout the recording. Then I tested it again this morning and it DIDN'T happen. Then I tested it again just now and it happened with AT&T wireless. I started muting the call and I went back to listen to the recording and sure enough, the recording cuts off the other person and it's just silent.
The reason this is a problem for me is I have to call in to a conference line for training. It lasts for about an hour and there are several others on the line, so we're all told to use our mute button so we don't hear the background of everyone else on the conference call. I had it muted the entire time. The entire recording had no audio! HOWEVER, I did this SAME exact thing twice last week and it worked perfectly fine. I called the same # did the same thing so it's frustrating again NOT to know if this app is recording correctly. ARG! I mean, if I don't want someone to hear something in the background while I'm listening to them, I want to keep hearing what they are saying in the recording, especially when I'm on my conference call training.
I hope it's just a bug or better yet a setting I can change, so I'm waiting to hear back from the dev and maybe someone here can test it. I tried testing it on my wife's Note8 and hers worked fine but then again, so did mine until last night. The other thought I had was to uninstall the app, reinstall it, make sure my settings are all the same as my wife's and then see if it continues to happen. But for now, the mute button seems to be an issue.