I have very limited experience with Signal, but it has an issue I cannot figure out that massively limits the appeal for me. I very rarely get any sort of notification. If I open the app on my OnePlus 7 Pro running Android 10, it'll flood me with missed notifications. But that's about it. (I think it has notified me in the past without opening the app, but I can't remember for sure.) I'm sure it's not designed to work this way, but I haven't worked out how to fix the broken notification system on my phone. Some online friends use it for coordinating plans, so I'm "forced" to use it (and try to remember to "check" it from time to time), but I do wonder how common my issue is. Presumably quite rare!

Does Signal work better on other platforms? (For me, no - I also have it installed on Windows and do not get notifications.)