This app is really splendid! It has a lot of functions and is really organized, from organizing plot details, thorough character profiles, and even scene creation (one of the best features, I havent had anything decent help with scenes)
Its definitely worth a couple of bucks. Its incredibly clean, stream-lined and thoroughly covers any story element. (Characters have inner and outer motivations. Every scene can be tied to certain plots. Etc etc)
The only reason I am not giving it 5 stars is because certain features (not many) are not self explanatory or intuitive (such as deleting a story or arranging orders of things). I also feel like some of the options in detailing can make it difficult to streamline an individual process. For instance, I might not use two or three character profile spaces but those spaces remain on screen, making me scroll up and down constantly past them to find the parts I actually used. I wish that you could customize what details you needed for your process.
But that is but a minor inconvenience in a superb writing app that can help map and plan virtually any story. In fact, one of its biggest flaws stems from being excessively helpful.
TL;DR
Yes, this app is worth your time and money. As a scatterbrain who needs a lot of structure and organization, I believe this app is a vital tool for being organized and creative, and being able to manage a wild array of concepts with relative ease.