First of all, Id like to note that this app does actually compile locally on your device without any internet connection or any connection to some compiling server. It comes with basic packages, but the app dev provides a detailed description of how to install custom packages, and it works just fine (for most parts). As for font, it actually is a challenge for non-expert users such as myself, exactly as described by the app dev. To note is how well the app actually works on a mobile device!!! Also, the communication with app dev is excellent. They provide you with all the help required and are pretty quick in responding. I would definitely recommend this app for those whod like to write or edit tex on the go, and would like to compile locally to visualize their document. Definitely worth investing 10$ for those who are willing.