I'm really warming up to this app. I've been using Annotate and Monosnap side by side for about two weeks now. Annotate is so much easier on the eyes; and it provides everything I need in my workflow.
- is simple & fast
- has all the tools you need to mark up a screenshot if required (incl. redaction)
- provides the necessary (basic) options for sharing your snaps (Dropbox, email, Twitter, Facebook, and Message; I mostly save to Dropbox or share via Message and email)
- allows you to keep multiple screenshot windows open (love it)
- won't shrink quality/resolution of snaps on Retina systems (an option under Preferences)
- records time-limited GIF movies for quick demos
- won't grab the title of the window you snap (unlike Monosnap; when I have to take many shots in a row, I keep going back to Monosnap so files in my designated Screenshot folder are not just an endless list of files named by date and time, but categorized by window/app snapped)
- won't let you customize the file name (default is eye-mm-dd at hh.mm)
- won't let you specify a custom default Save folder under Preferences (but will remember your last Save location in the app)
- does not have a Timer feature (although the developer is working on it, I believe)
The developer is very responsive, if contacted, and open to suggestions. Their goal seems to be to keep things simple so as not to overwhelm "nonpower" users — so if you want a ton of customization options, you are not the target audience. However, if you want a nice, quick, reliable screenshot and annotation app, check it out — at $1.99 it's a steal; but at this point, I would even pay $4.99 for it (having the option to keep multiple snaps open at a time alone is worth it for me).