I just released an iOS app called ArXivToPrompt. It takes an arXiv paper, generates a clean LaTeX source, and copies it so you can paste directly into ChatGPT (or any other LLM app).

The idea comes from a CLI tool I built a few months ago, arxiv-to-prompt: https://github.com/takashiishida/arxiv-to-prompt

I’ve been using the CLI tool daily to help me quickly understand arXiv papers. This downloads the arXiv source files, finds the main `\documentclass` file, and flattens everything into one coherent LaTeX source (people usually have multiple .tex files in a single paper by using `\input` and `\include`). It also has options to remove comments and appendices to shorten prompts.

I often used the CLI tool on my laptop, but since I commute by train in Tokyo I wanted somthing I could use on my phone. That's why I built the iOS app.

With equation-heavy papers, it may be better to provide the precise latex notation instead of providing the PDF. Uploading PDFs is also more difficult and time consuming (especially on the phone).

Thanks for reading! This is my first iOS app, and I’d appreciate your thoughts!