it's return 400 error
Unknown error happened: time data did not match format: data=va fmt=%Y-%m-%dT%H:%M:%S
are you referring to this: https://todoist.com/m/ or to a specific 3rd party Todoist app?
In case of the above URL - indeed, some queries don't work. I've forwarded this to the developers. Thank you for pointing it out and sorry for any inconvenience.
Also, please be advised that this is just a temporary mobile solution, we will soon release a better Todoist Mobile App.
We are pleased to announce that the Todoist Mobile application for iOS is now available at the App Store: http://itunes.apple.com/us/app/todoist/id476672770?ls=1&mt=8
It can be downloaded for FREE. It's compatible with iPhone, iPod Touch and iPad (requires iOS 3.0 or later). Beside all standard Todoist's features, Todoist for iOS also includes OFFLINE SYNC.
We will soon release the Android version as well and will notify you once it's been published.
Thank you for your patience and continued support, we hope this App will increase your productivity and provide a great extension for Todoist's functionality which we will continue to develop according to your suggestions and feature requests posted in our Votebox: http://todoist.com/Vote/
If you have any questions or suggestions for the improvement of this App or experience any issues with it, please post them in this thread: http://todoist.com/Support/showQuestion/720/
We appreciate any feedback.