Stayjuice
depends on what you mean. If you want to use them anonym you should rather use the browser version.
(since this way they can acces the least as far as i know, but feel free to correct me if i am wrong)
The rest is just my opinion and i dont know what i am talking about.
If you use them long term on your device, i dont think it does matter that much that they can access the mentioned identifiers. Since most data they steal, is your normal usage data.
I would not realisticly be concerned about them using these to match the usage data to your real identity somehow.
(i mean i think if anything they use these to "track" you in their ad network across apps)