Logline is described as 'screenwriting and outlining app that lets you see the structure of your screenplay' and is an app in the Video & Movies category. There are seven alternatives to Logline for a variety of platforms, including Mac, Windows, iPhone, iPad and Linux. The best alternative is Scrivener. It's not free, so if you're looking for a free alternative, you could try OmniaWrite or Highland. Other great apps like Logline are Final Draft (Paid), Slugline (Paid), NovaScriber (Free Personal) and Fade In (Paid).
Use your creative energy to focus on the content; let Final Draft take care of the style. Final Draft is the number-one selling word processor specifically designed for writing movie scripts, television episodics and stage plays.
A most awesome writing tool Create novels, short stories, research papers, notes. Track progress on individual documents and your entire project. Relate documents and items to people, places, plot points and actions.
Fade In Professional Screenwriting Software is a complete application for writing motion picture screenplays, including tools for outlining, organizing, and navigating, plus extensive screenplay formatting and robust tools for managing rewrites and revisions.