Survey Solutions Tester is a free application developed by the World Bank for Android devices. It is designed to test the functionality of questionnaires created with the Designer of World Bank's Survey Solutions system. Users can log in to the Tester using the account credentials they created on the Survey Solutions website.

The application emulates the process of data collection by allowing users to enter data, validate conditions and skip patterns, and display reports on the progress of the questionnaire completion. However, it is important to note that Tester should not be used for actual data collection as its database is purged after every testing session.

Overall, Survey Solutions Tester is an essential tool for testing questionnaires created with the Survey Solutions system. It is user-friendly and provides a comprehensive solution to test the functionality of questionnaires. For more information about the World Bank's CAPI/CAWI system, please visit their website.