You may need to use the hive keychain browser on mobile so it allows you to login that way.

We're not very optimized for mobile at the moment as the main attraction, the extension, only works on browsers and PC. But we'll try making it easier in the future.

You also need to search for the movie/tvshow/etc you wanna post about before being able to write a longer article about it currently, once you find the movie there's a "write longer review" option after you rate it.

Let me know if you still have issues.