The app worked great for the 1st month, now in the app on my phone, the notes freeze, add multiple rows between words, and I lose saved notes etc. I paid for the premium SecNotes and loved it. Now I find it very frustrating and unreliable to use to save important notes and messages. Works great on my desktop, but that is not effective for on-the-go use. Please help!

I have developed the same issue, I hope they fix it. I have S21 Ultra also.