As long as such applications are not officially issued by the forum admins/developers, their use involves a risk.
Being open source does not mean that it is 100%.
There are some browsers like Opera, Puffin, and UC that give nice and good interfaces when browsing this forum but using PC to browse this site give you better results.
That is exactly what being open source means. That it is 100% safe. If it wasn't people would be able to test the codebase and find out vulnerabilities.
With that said, I tried that app, the signatures didn't appear okay on my device... maybe because I used a phablet.
does anyone know if the new software is mobile friendly?