Omnifocus does [end-to-end encryption](https://www.omnigroup.com/blog/omnifocus-now-supports-end-to-end-encryption https://www.omnigroup.com/blog/omnifocus-now-

Omnifocus does [end-to-end encryption](https://www.omnigroup.com/blog/omnifocus-now-supports-end-to-end-encryption https://www.omnigroup.com/blog/omnifocus-now-supports-end-to...) now. They have no reason to access and sell your data because they have a healthy business model built around premium priced apps. I think the reason a lot of companies don't use iCloud is because some of the various ways in which iCloud worked have not always been reliable or suited to the task at hand.