Really awesome app & excellent UI. Very helpful to keep a running record of tasks, which is synchronised & securely shared readily accessible across all devices. Functionality is brilliant & the design is minamlist, but with unparalleled style. Would be appreciated to have further information & summarisation about the security architecture & its implementation in this application. An independent & impartial security audit & some form of certification would be helpful & a description of what (if any) propietary or open source code is being implemented, especially with relation to D2D zero knowledge encryption. Some further information & explanation about what specific "flavour" of D2D zero-knowledge encryption is being utilised & how that has been designed & is being applied would go further to enable users to understand & be further reassured. I have no reason to questiont the motives or legitimacy of the developers, but some of the above might prove to be popular & attract further customers! A future option of device 2FA with a Yubikey 5Ci (or similar product) would strengthen device authentication, authorisation & streamline accessibility. All in all, this app is excellent & really appreciated. Secure cloud based note sharing software is a godsend & it is at a reasonable price as well, which always makes the difference ! Highly recommended to one & all. Glad I found it, as it has suited my requirements perfectly. P.s. If some of information available already please provide it at your leisure !