Be sure to check out the latest Chronicle update. In addition to some small bug and performance fixes, you can now enable an extended keyboard to make adding in-line timestamps easy as you write. There's also two buttons to make navigating you writing easier - tapping will move the cursor to the next word, for example. There are a few other changes sprinkled throughout. I leave finding them as an exercise for the reader ;)
As always, let me know if you need help or have questions.