I have been using ToDo for iOS for a few years and love it. I even loved the Mac version, but the iCloud sync is totally messed up and Appigo’s develoment and support team are completely useless. I have reported the issue since Novemember and every week I get a response of “it is submitted to Apple”, “we are waiting for Apple”, “it is Apple’s fault”, etc… I have multiple applications that have updated so I know Apple is approving updates for Mac, it is clearly a delay tactic by this company. Many people have been complaining about this and starting a new year with a productivity application that simply doesn’t work is not acceptable. It is now time for a New Year and a new app, good bye todo, good bye Appigo… It was nice knowing you… UPDATED: 1/13/15 Today Appigo finally updated the App and I immediately started using it. First you have to add iCloud as your sync service but after that so far so good. The UI is cleaner and looks more like Yosemite than in the past, so that is a positive. I will continue to increase the star ratings after I have used it for a few weeks and there are no issues. I will never give it 5 stars because it took Appigo 4 months to upgrade to support Yosemite and iCloud, even though a Developer Preview has been available for at least 9 months prior. Hopefully, Appigo will put more effort into it next time and stop spending time/effort on their own ToDo Cloud service.