I would recommend using eSteem Surfer which is the PC version of eSteem. Version 1.0.6 is the most current version at the moment. I have written a few posts about eSteem features.
I am not a big fan of using apps on my phone, so I was very happy to find the PC version. This version just needs your posting key, unless you want to transfer money.
As you, I also host contests and find it very helpful to bookmark posts inside the app, as well as saving favorites and drafts. It makes it easier to keep track of and manage everything.
The support for eSteem is also good. There is a whole team but you can always leave a message for @good-karma, he is the head developer.
Thanks for the suggestion! I'll look into it more today and see if I can get a post out using the eSteem Surfer