The dSLR Camera Remote is available in two flavors, a lite version ($1.99) and a professional version ($9.99 on offer!). As expected the lite version is for users who are satisfied with the very limited controls that it offers. Which is triggering the camera's shutter, battery status, memory status and a post capture preview. This lite version however lacks some of the significant features that makes having this app worthwhile.
The professional version of the app is the one to go for. It offers a plethora of powerful features that makes it worth having the app.They include Fire Camera Shutter, see post-view image, Battery Status, Images Remaining, Zoom-in on post-view image, LiveView and much more. The only feature limitation of the app that nags me is that presently the app supports only selected Canon cameras. The developer has stated that support for more canon as well as Nikon cameras are in the pipeline.