1) HDR (exposure bracketing) using either the camera's bracketing feature or bulb-mode bracketing where the exposure is controlled by how long the shutter is held open - up to 9 exposures and in many different possible patterns
2) Exposure ramping using bulb mode - ramping the exposure either up or down following any of eight selectable ramping curves
3) Daily sleep period for when you are doing a very long timelapse over many days but only want to take photos during a specific time period every day
4) Location and orientation information using your phone's GPS and compass
5) Optional creation of an email when you start taking the timelapse that contains all the technical details of sequence as well as your GPS coordinates and orientation - you could also use this to send your coordinates to someone even if you aren't making a timelapse.
6) Save and reload named setting sets for a sequence with a simple button tap
7) Ability to concatenate multiple saved sequence sets into one combined set. You could use this for example to combine a ramp-up, non-ramped, and ramp-down sequence in order to cover the entire day.
8) Automatic recall of most recent settings without having to do anything at all
9) Ability to use the mirror-lockup feature of your camera if it has one.
10) Ability to specify many different characteristics of your camera, like its shutter lag and preferred pulse times for firing the shutter, waking the camera out of sleep, doing mirror-lockup.
No other timelapse device or program comes close to having all these features.