I have both. The "Tasting Notes" app is quite good, but consider it more of a multi-purpose review database that needs a little polishing. The good news is that it's highly configurable so you can change things to suit your preferences. For example I added a "wife rating" to mine, so I recall which ones she likes also. I added a "source" item so I remember where they came from. Etc.

The other one is a reference but just that, and really, you could probably find the same online cheap. I haven't found it particularly useful.