Our anyTide app is now available in the app store. Search for "anytide" or go directly to:
There's a page on our website that describes how to use it in reasonable detail. Worth looking at, since there are some useful, subtle features like the use of bookmarks to allow offline predictions :
AnyTide App - Products | National Oceanography Centre | from coast to deep ocean
Unfortunately, Apple didn't like us giving time-limited free data (i.e. up to the end of June), so we've had to take that out.
The free version gives free predictions for the current day anywhere in the "NW European shelf" plus a preloaded bookmark near Liverpool, which is unlimited and allows you to see how it works over longer periods of time. A calendar year's worth of predictions in all included locations costs £1.49 via in-ap purchase.
I'd welcome any feedback, either via PM or contact me via the mail link on the NOC webpage shown above.