Mobile-Companion is designed for in-person gaming sessions, catering to players who prefer not to micromanage their inventory. This module provides a streamlined, clean user interface that displays all relevant information for items, and will soon include spells and other features. With Mobile-Companion, players will never need to look up items in the rulebook again.
Well... no. Sheet-Only is intended to provide the whole character sheet and developed quite fast to a semi-interactive experience where player can do things to in-game token.
Furthermore, Sheet-Only uses the system's own character sheet implementation (and modifies it if necessary) and therefore is quite system-agnostic. Mobile-Companion on the other hand only uses the underlying data model and foundry functions, but the UI is made from scratch. Therefore, Mobile-Companion is not system agnostic.
Also, system sheets do not provide all the data necessary for in-person sessions. Most of them don't show the roll formula. Mobile-Companion adds all the information a player needs.
And last but not least: Mobile-Companion is intended to work on smaller displays like smartphones!
Starting with version 0.6.4, the free (light) version does not include all the features offered in the pro-version. Find out more about this on my Patreon.
I will at least do the aforementioned systems as well as adding spells. If everything goes smoothly I'll also add additional information, useful to the players like feats, combat maneuvers etc.