Apps

This page lists the apps that are available on rahalabs.net. All apps hosted here are for free, although a Google login might be required for some. I have built these apps in my free time, largely out of frustration of not having access to these tools without hitting paywalls or having to watch ads. This is a growing list so check back later too.


Qntafi Options Screener Pro takes the guesswork out of options trading and is the ultimate analytical tool for options traders. Designed to sift through thousands of options chains instantly, QNTAFI algorithm helps uncover the most capital-efficient Put and Call Credit Spreads available in the market at the given time. Try it now (requires Google login for access)


Free Video Compressor is a fast, privacy-first web app designed to shrink massive 4K and 1080p videos down to smaller shareable 320p files. Unlike traditional compressors that force you to wait through long, frustrating cloud uploads, have a paywall or make you watch annoying ads, this app compresses videos directly inside your device’s browser. This means your private videos never leave your phone or computer, processing happens offline, and you can free up gigabytes of valuable storage space. Try it now!


Tired of uploading your personal documents to sketchy online PDF editors? Secure PDF Toolkit is a free, privacy-focused web app that lets you merge, split, and sign your PDFs without ever sending them to a server. Drop a visual anchor on any page to type your signature or initials, featuring a curated selection of elegant, built-in cursive fonts and color controls.  Powered by client-side web technologies, ensuring security of your documents that never leave your browser. Try it now!


LLM Council is a chat platform that queries multiple LLMs  to deliver objective, consensus driven answers. Users can select up to three LLMs and a synthesizer by providing their own API keys (needs Google Login). Groq, NVIDIA NIM, and OpenRouter are available from the settings that give access to open source or low cost LLMs eliminating commercial API token costs and single vendor rate limits.  The Synthesizer provides consensus answers also highlighting key disagreements between LLMs. Try it now!