# Sigma Vision
> Sigma Vision is an AI adult-content blocker for Windows and Mac, made by Sigmaio s.r.o. in Slovakia. It is not an iPhone or Android app.

Sigma Vision runs on the computer. Layer 1 blocks known adult websites. Layer 2 watches the screen with on-device AI. Layer 3 can lock screen, keyboard, mouse, and voice after the warning limit. Detection stays on the device. Family and Pro can email a partner or parent. There are no third-party screen reports.

Official site: https://sigmaio.sk/
Checkout and device management: https://app.sigmaio.sk/
Contact: hello@sigmaio.sk

Plans (euros, billed monthly): Starter 3,99 € (1 device), Family 6,99 € (up to 5, dashboard, partner or parent email), Pro 9,99 € (up to 10). First month free with code TRYSIGMA at checkout until 30 September 2026, first 100 customers.

## Product
- [Home](https://sigmaio.sk/): What Sigma Vision is and who it is for
- [How Sigma Vision works](https://sigmaio.sk/how-sigma-vision-works/): Blocklist, on-device AI, session lock
- [Pricing](https://sigmaio.sk/pricing/): Starter, Family, Pro
- [FAQ](https://sigmaio.sk/faq/): Common product questions
- [Contact](https://sigmaio.sk/contact/): helo@sigmaio.sk

## Who it is for
- [I cannot stop on my Windows or Mac PC](https://sigmaio.sk/cant-stop-on-my-pc/)
- [Sigma Vision for couples](https://sigmaio.sk/couples/): Home computers, not a screenshot report
- [Parental controls on a shared Windows or Mac](https://sigmaio.sk/parents-shared-computer/)

## Guides
- [How to block adult content on Windows and Mac](https://sigmaio.sk/how-to-block-adult-content-on-windows-and-mac-step-by-step-guide/)
- [Parental controls on a shared family computer](https://sigmaio.sk/how-to-set-up-parental-controls-on-a-shared-family-computer/)
- [Best adult content blocker for Windows and Mac (2026)](https://sigmaio.sk/best-adult-content-blocker/)

## Comparisons
- [Covenant Eyes alternative](https://sigmaio.sk/covenant-eyes-alternative/)
- [HardStop alternative](https://sigmaio.sk/hardstop-alternative/)
- [ZenView alternative](https://sigmaio.sk/zenview-alternative/)
- [Canopy alternative](https://sigmaio.sk/canopy-alternative/)
- [Qustodio alternative](https://sigmaio.sk/qustodio-alternative/)
- [Bark is not a Windows or Mac substitute](https://sigmaio.sk/bark-alternative/)

## Legal
- [Terms of Service](https://sigmaio.sk/terms/)
- [Privacy Policy](https://sigmaio.sk/privacy-policy/)
- [Cookie Policy](https://sigmaio.sk/cookie-policy/)
- [Obchodné podmienky](https://sigmaio.sk/obchodne-podmienky/)
- [Ochrana osobných údjjov](https://sigmaio.sk/ochrana-osobnych-udajov/)

## Optional
- [Blog](https://sigmaio.sk/blog/)