LDS Tools is a mobile app that works on a smartphone or tablet and lets you download directory information and the events calendar for your ward, branch, stake, or district. Bishoprics, branch presidencies, and stake and district presidencies, as well as clerks and executive secretaries, can also download additional membership data and reports for their units.
Since LDS Tools for iOS version 2.1.1 was released on October 19, 2012, many users have been unable to update their LDS Tools data on Sundays.
The Church has provided a fix, which is version 2.1.2 now available in the app store, which should resolve this issue.
Please download the update 2.1.2 before trying to update your membership and calendar data.