Is there any app for mobile phones that works with recent version of CiviCRM? We use CiviCRM ver. 4.7.16. and there is one app CiviSync Mobile on Google Play shop, but it doesn't work.
To use your CiviCRM on small screens a responsive theme is all that's needed.
This is an extension that will make the admin menu responsive: https://civicrm.org/extensions/slicknav-web-responsive-admin-menu
A google summer of code did make one app that interfaces with other phone features. I'm not sure why it's not on the google play, but https://github.com/Jagatheesan/CiviDroid---Alpha https://github.com/MounaAnnavarapu/Cividroid-2.0-Dashlets