This is especially troublesome with 3G (Australia) but also very frequent at home on the wireless.
generally, we don't have a dedicated Todoist iPhone app yet, these are all 3rd party solutions, but we will release our Todoist iPhone app very soon which will work much better.
Still, in order to exclude server based issues, which may have occurred in this case, please describe exactly how these issues look like. Are you unable to add tasks? Are you unable to login? Do you have general issues with loading Todoist?
Also, please let me know when do these issue occur? Always or at certain times?
The up and coming iPhone app will be great. The issue with checkit is login in the first place. I don't have any problems with login or operation of Todoist when using my Mac.
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.