I first bought this same dictionary for my iPhone and I found it really useful, so I went ahead and also bought it for my Mac to have it handy on my computer instead of having to take my phone out every time I wanted to look up a sign. This same software company offers another dictionary called 'ASL Dictionary HD'. That is indeed recorded in HD, and this one isn't (the videos here are in SD since this app is older). Despite this, I found it very useful to still have both dictionaries and use them in conjunction because they each feature a different person executing the signs, and sometimes the way a sign is shown in a dictionary differs from how it's presented in the other -- not because one is correct and the other isn't, but rather because they are actually two correct ways to execute the same sign. Therefore, the two dictionaries complement each other. Ideally, the would have included both ways to execute the sign in the newer dictionary, but they didn't. So it's not redundant to get both. Maybe for a future update, the developers can merge both dictionaries and replicate them in both apps, so that no matter which dictionary you buy, you still get to learn all the ways you can sign a word.

this is not fully correct on signs, there should be different ways to sign one specific word. For example Hospital is NOT correct/ that is an SEE sign not an ASL sign. I am a professional Asl Interpreter and wanted something I could refresh myself or add to my vocabulary but now there is no trust in this app. not sure how to get a refund, but I feel like I wasted my money.