I've been using this app for several years and have really found it useful, not only to plan my field work, but as an educational tool for students in my oceanography or marine biology courses.
Unfortunately, the newest version has taken a step backwards, in my opinion. The satellite images are a nice visual touch, but take some time to load (10s?) when you are switching views. Please consider returning to a faster or less graphic intensive mode.
Second, the calendar view of 'month' is much less informative that in the previous version, at least graphically. In the previous version, the colors for rising/falling/neagive tides were displayed on the month view. In the current version, the calendar view graphics have been simplified and there isn't a way to display these colors. This was useful in showing students the changes in a month at a glance and makes it easier to find that elusive minus tide. You can still see the colors in the DAY view, but no longer the calendar month view. Please consider providing the colors as an option on the calendar view. (And gimme back those old moon phase icons - they were cool!).
Lastly - what happened to the "X" in the app name?
In any case, I hope you will consider my suggestions and continue to improve the app.