LibreOffice Calc is the spreadsheet program you've always needed. A fork of OpenOffice.
ZK Spreadsheet Status Details
ZK Spreadsheet Alternatives
SaaSHub's Down Detector checks the status of services automatically and regularly. However, we cannot promise 100% accuracy. That is why we depend on user reported issues as well. The ZK Spreadsheet status here can help you determine if there is a global outage and ZK Spreadsheet is down for everyone or it is just you that is experiencing problems. Please always report any issues to help others know the current status.