As a non-tech user I found your description on Google Play Store
fairly opaque. If you could use some sentences without jargon
perhaps more people would download your app.
I particularly want to know whether I can use the app with Dropbox,
Lastpass and Google. If it's true you could add a phrase such as
"FreeOTP works anywhere that Google Authenticator does" to your
I'm afraid that I don't know what 'TOTP' means, and I don't want
to. Please excuse my being blunt but, I want to make the point
that there are probably millions of people with the same attitude.
How often do you update the app? Duo claim on
their blog that they update their app every month or two and
that this makes them better than Google Authenticator.
Best wishes for the success of your app,
aka Catbells on Ubuntu Forums et al.