1) From setup click 'Salesforce1 Quick Start'.
2) Click on 'Launch Quick Start Wizard'.
3) Click 'Let's Get Started'.
4) Click, drag and drop the item 'SF1 Timba Surveys' form 'Available Items' to 'Navigation Menu'.
5) Click 'Save & Next'.
6) Click 'Next' on all the remaining steps and 'Finish'.
After you completed all the steps you will be able to see the 'SF1 Timba Surveys' tab on Salesforce1 like so...