I have an app which works similar to a to-do list. The user creates tasks which they want to be completed on their iPhone, and they are reminded at a desired time each day to complete that task. However, I am unsure which method of transferring data would be best for my app. I would like the Apple Watch to have the capability to at least view, and complete tasks. I would also like the data to be updated on both the Watch and iPhone when a task is completed, added, or deleted.
Should I use:
updateApplicationContext or transferUserInfo or sendMessage or any other method?