I want to to use a service for crash reporting and I see that there are a few options Crashlytics, Instabug, Bugsnag, Bugfender, Splunk Mint, Visual Studio App Center, etc.
- I am cost constrained, so I don't want to spend a lot particularly at this early stage.
- I want more than just crash information, I want to be able to log exceptions and things which don't crash the app but impact the user experience.
- Can additional logging be added?
- Not essential, but I would like to see how users are using my app as well.
I see Crashlytics is free but it even address items 2, 3, and 4? Do people use multiple tools?
- Crashlytics does the crash collection part very well, but I don't think it does the rest. It's free, although there are the privacy implications of using a Google service.
- Bugfender does all of the functions you mentioned: it collects crashes/exceptions and other errors that do not crash your application (called "issues"). Besides exceptions, you can collect application logs and navigation. It has a free plan that might be enough for your purposes, especially if you mention you're early stage.
- Splunk is "enterprise". They might have a free plan, but they're not advertising it. I think it does most of what you are looking for, as well.
I do not know in detail the rest of the tools you mentioned, so I prefer to keep my opinion to myself.
Disclosure: my answer might be biased, I'm co-founder of Bugfender.