After 3 years of being a part of the Sktchy community, I can safely say that Sktchy is not only my most used app, but my favorite one as well. As a developing portrait artist, Sktchy provided a safe & and supportive environment for me to post my art work, as well as an endless supply of reference photos to work from. Ive been continually impressed by the apps development and by the personal responsiveness of Sktchys developers, too!
The coolest feature when I first started using the app is still a huge draw--you can swipe right on any artwork to view the source photo that inspired it--but now Im in for so much more than that: the weekend prompts, the community interaction, and the amazing art by so many talented artists...
Bonus: I never know when one of those talented artists is going to draw me!
Whether an artist (of *any* level!), an appreciator of art, a model (or all of the above) Sktchy is a an awesome place for portraiture. I highly recommend!