Official Happ sources: website, app stores, GitHub

The project's official website is happ.info. The old address happ.su remains as a redirect to the same site, so both links end up at one official resource.

The documentation runs separately from the main website, at docs.happ.info. It covers system requirements, adding configurations and subscriptions, errors, provider parameters and other technical topics. For practical “how do I set this up” questions you usually need the documentation, not the website's home page.

In every store listed, the developer is shown the same way: Flyfrog LLC. This is the fastest way to check that you are looking at the official app and not a program with a similar name from another company.

For Windows, macOS, Linux and Android there is an alternative source: the repositories of the Happ-proxy organization on GitHub, where files download directly, without an app store. A detailed look at the repositories, file formats and the difference between a stable release and a pre-release is on a separate page, “Happ on GitHub”.

Searches in app stores and on the internet at large turn up websites and programs with names that resemble Happ but belong to other developers. Here are a few landmarks that concern the source itself, not the content of the app:

• Website address. The official one is only happ.info (and happ.su as a redirect). Any other similar address has nothing to do with the project.
• Developer in the store. Flyfrog LLC is the only company connected with Happ in all official app stores.
• Direct link from the documentation. Links for Russia and other special cases are best opened from the documentation, rather than searched for by name in the store search.
• Files only from GitHub. For installation on a computer, or the APK on Android, the official source is exclusively the github.com/Happ-proxy repositories, not third-party archives and forums.

A fuller walkthrough of checking the file itself, by hash, digital signature and a match with the release data, is on the page “How to verify the authenticity of an installation file”. If Happ is already installed and you need to connect a server, the next steps are collected on the pages “Adding a server manually” and, for a whole subscription, “Updating a subscription”. You can also read about adding keys and subscriptions and the Happ documentation FAQ.