I did some research too, over the past 4 weeks about these software types. I came to the conclusion that everyone needs fast internet, an audio interface (lower latency and noise issues), preferably wired internet, and the ultimate way is a private server.
Since there are not a lot of people that want to put so much effort into making these programs work, I believe that other rehearsal exercises are the answer, at least for my band.
I made some videos on the subject, because it intrigues me why most stuff is outdated, and due to quarantine I need a creative outlet.
If you're interested, here are links:
link: 9 Tips for Band Practice During the Corona Crisis
basically, I believe there's four things a band can do together:
1. Hang out without playing
2. Songwriting excercises
3. Remote recording your music, layer per layer
4. Try one of the aforementioned softwares.
I guess if Jammr works for you, it will work for some other people as well. I had some tough luck with Jamkazam, Jamulus and Ninjam, which I reviewed in another video:
link: Online band practice in 2020.. does Zoom work? (sorry for the clickbait titles)
If anyone is looking for a list of real-time rehearsal software, here's what I found:
- Jamkazam
- Jamulus
- Ninjam
- Jammr
- Sofasession (out of date website)
- Jamlink (some weird interface needed)