Yes, Android certainly has some excellent journalling apps too. But before jumping in and using them, you may want to consider why you are doing a journal…
Quite often, the content created stays within that app. If you switch apps or phones later on, will you still have access to that content. Will it be readable in 10 years’ time when the app is no longer supported?
Something that is capable of being exported maybe to a Markdown, or similar open standard format, can at least stand a chance of being readable.
Although I’m a big fan of technology, sometimes writing in a paper journal can actually be a lot better. No content format issues, and someone will probably be able to read it in 200 years’ time still. I have some old family journals that were written over 100 years ago, and they are still readable. If our ancestors had smartphones back then, you can be pretty sure we would not be reading their journals today.
But if you just want to write for now and the intention is that no-one ever reads your journals, then an app may be the perfect thing. Just don’t get disappointed after losing your phone, forgetting your password, or migrating to a new phone, and you find you’ve possibly lost the last few years of journal entries.
See https://www.androidpolice.com/best-iphone-journal-app-alternatives-for-android/