pheebo - Grammarly for your AI math

pheebo is a Chrome extension that automatically detects mathematical errors in LLMs, guarding your back and simplifying your workflow.

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Hi, producthunters!

I am Giuseppe, the maker of pheebo – thank you for checking us out!

I created after stumbling upon mathematical errors of ChatGPT while working on my engineering projects. Currently, over 800 million users turn to ChatGPT every week for personal or professional aims. Within those conversations many errors are left unnoticed. I built as a tool that will assist spotting and resolving those in a fast and effortless manner.

is a Chrome extension. Using it, you don’t disrupt your workflow by turning to external math solvers, or continuously asking ChatGPT to use Python for calculations.

With anyone can fully exploit LLMs’ capabilities, whether it is for your kid’s homework, your daily calorie intake, your mortgage or prices for the menu of your restaurant.

We are ready to launch helping you cross-check your computations in two modes:

  • Selection mode: click and drag to frame the mathematical expressions to instantaneously verify if the result is correct;


  • Automatic mode: works in the background, guarding your back and flagging incorrect expressions while you work.

doesn’t use LLMs for the computations, so you are sure that the result is correct to computer precision. We are still in the early stages of our project and our core aim is to make sure it is functional. Therefore, we would appreciate your honest feedback. Check old conversations and you might discover errors you overlooked in the past.

Thanks for stopping by and trying it out. Your opinion will help us make pheebo better and we are looking forward to answer any questions.

Giuseppe and Plamena, Team pheebo

Super useful concept. Having a Chrome extension like Pheebo that automatically flags those hidden numerical or logical errors feels like a real productivity boost. Excited to see how it evolves and integrates with more AI workflows!

thank you! We are excited to see where this approach is taking us 😃

Congrats on the launch! 🔥 Love the idea, finally someone tackling the math hallucination problem head-on. If Pheebo can seamlessly flag LLM miscalculations without slowing the flow, that’s a total game-changer.

  Thank you!

Yes!! A problem I'm interested in. Also I appreciate chrome extensions, think developers should focus on them more.

  Thank you!

Catching ChatGPT’s math mistakes before they slip by 😅 The idea of automatic and selection modes is genius, especially for people working on data-heavy or technical projects

 Thanks Esther, that's the idea behind pheebo - catching LLMs' errors while it's not too late...Indeed, the automatic mode is seamless, so it is really easy to use. Thanks for your support and comment!