> For the complete documentation index, see [llms.txt](https://kb.nssurge.com/surge-knowledge-base/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kb.nssurge.com/surge-knowledge-base/license.md).

# License

- [Surge Pre-sales FAQs](https://kb.nssurge.com/surge-knowledge-base/license/pre-sale.md)
- [Surge iOS Licensing FAQs](https://kb.nssurge.com/surge-knowledge-base/license/ios-faq.md)
- [Surge iOS Feature Update Subscription](https://kb.nssurge.com/surge-knowledge-base/license/ios-fus.md)
- [Surge Mac Licensing FAQs](https://kb.nssurge.com/surge-knowledge-base/license/mac-faq.md)
- [Surge Mac Maintenance Update Subscription](https://kb.nssurge.com/surge-knowledge-base/license/mac-fus.md): This article systematically explains the rules and user rights of the Surge Mac maintenance update subscription model for reference and consultation.