This is excellent! I've discovered that I value very similar features as I have tried other journaling apps.

I found that my personal favorite solution so far is actually a chatroom with just myself in KakaoTalk. It also has the extremely simple input, which is critical to make sure capture and journaling actually happens, and fast search using substrings and tags, which make recall simple.

EDIT: Also, automatically timestamped input! Which puts both your app and my solution a step above a plaintext file

It's not without its warts, which your app does away with. However, I personally find the ability to post photos, videos, and audio recordings very useful, and for that reason will likely stick to my existing solution for now. Regardless, it's really great to find others share similar values in journaling, and I'll be following closely! Thank you!