# ApexCalc vs insideout: which to pick

> ApexCalc vs insideout: pricing, platforms, launches, upvotes and founders side by side on ProductsFarm, with notes on which to pick.

Canonical: https://productsfarm.com/compare/apexcalc-vs-insideout
Last updated: 2026-11-06

|  | [ApexCalc](https://productsfarm.com/product/apexcalc) | [insideout](https://productsfarm.com/product/insideout) |
| --- | --- | --- |
| What it is | Free online calculators for medicine, engineering, finance and science | for engineers who want to understand AI and quant, not just use them. |
| Pricing | Free | Freemium |
| Platforms | Web | Web |
| Categories | Productivity, Education | Education, AI |
| Made for | students, professionals, finance teams | engineers, quant job candidates, people learning AI |
| Built with | [Tailwind CSS](https://productsfarm.com/tech-stack/tailwind-css) | [Vercel](https://productsfarm.com/tech-stack/vercel), [Google Fonts](https://productsfarm.com/tech-stack/google-fonts) |
| Upvotes | 14 | 0 |
| Website | [apexcalc.net](https://apexcalc.net/) | [insideout.sh](https://insideout.sh/) |

## About ApexCalc

ApexCalc is a free web platform that gathers calculators across more than 50 disciplines, including medicine, engineering, finance, science, law, and sports and fitness. The site lists over 11,600 tools, which can be searched or browsed by category and opened in the browser without signing up or installing anything.

Each calculator opens on its own page. The site says its tools include formula logic, sourced citations and links to related tools. It also lists regional finance, tax, mortgage and legal tools for 150 countries, alongside everyday calculators such as BMI and mortgage tools.

The platform is aimed at students, professionals and anyone who needs a quick answer in a specific field. The site states that every calculator is free with no account required. It also describes paid tiers for saved bookmarks, PDF export and API access, but these are marked as coming soon and are not yet available.

## About insideout

insideout teaches two subjects, AI engineering and quant engineering, through short lessons with live examples that readers can play with. Each lesson covers one idea in plain words, asks the reader to make a guess, shows how wrong it was, and ends with a few lines of real Python.

Every module opens with free lessons, and each day includes one free practice set. Pro adds all lessons, interview practice for roles such as quant trader and AI engineer, unlimited practice sets, timed runs and tracks that let learners skip what they already know.

It suits engineers who want to understand how models like GPT work, and people preparing for quant roles. Lessons run in the browser and work on a phone. No maths background is needed, though a little Python helps with the code examples.

## Related

- [ApexCalc](https://productsfarm.com/product/apexcalc)
- [insideout](https://productsfarm.com/product/insideout)
- [More comparisons](https://productsfarm.com/compare)