Celtx

The fact that I am able to collaborate with other Writers to work on the same project is one thing I love most about Celtx.
With its cloud feature, it is impossible to lost a file as all works are automatically saved to the cloud.
The tips on the blog section is another feature of Celtx i love so much. Those tips help you overcome "Writer's Block".
The software is pretty simple to navigate and use.
It is available for both PC and Mobile Phone users.

I really don't have anything negative about Celtx. But they should integrate "TITLE PAGE" feature in the mobile version. Unlike the PC version, mobile phone version don't allow writing "Title Page" in your screenplay.

It doesn't matter if you are a student, an amateur, or a teacher. This program, used even by great screenwriters, is excellent. Celtx helps you to correctly divide the sequences, to space the dialogues, to easily indicate the entrance of the characters, the general objective is that you concentrate on the creativity, and the program takes care of the formatting.
Scripts can be shared from within the program to harmonize teamwork, and can also be sent in text (.txt) or pdf format via e-mail. The texts remain stored in the cloud, which makes it great for possible loss of physical devices.

There are not many cons to this program. Perhaps the most significant one is the price, but this depends on who you are and by this I mean: if what you are looking for is a casual immersion into the world of film writing (among others) perhaps it is not the best option, at least I would take it as an unprofitable investment. Taking into account that its costs range from twenty to thirty dollars. But out of that and some small "bugs" in its mobile version. This program is great, not for nothing it is chosen.

The ease in ability to separate between all the different styles within a screenplay. The name save feature is great.

It does take a bit to get into the habit of using the different sequences. The export options are minimal.