Is this the official Clash Meta website?
No. cmfa.dev is not an official site — it gathers the official release page and basic instructions in one place. The project, its source and the APKs belong to MetaCubeX; the GitHub project is the authority.
Which build should I download?
Universal if you are unsure. Most phones from the last few years are arm64-v8a, emulators are usually x86_64. Pick wrong and it simply will not install — download another.
Android says the file could be harmful. Should I stop?
No. Every APK from outside an app store gets that notice. Check the file name against the release page, and continue if it matches.
Is CMFA a VPN? Do I need to buy anything?
It is a proxy client that uses Android’s VPN interface; it has no servers of its own. You supply the nodes, from whichever provider you choose.
I imported a subscription and see no nodes
Open the link in a browser first — if nothing downloads, the link is expired, out of traffic, or needs to be regenerated. If it works, pull down to refresh the profile in the app.
Can I keep the old Clash for Android installed too?
Not really. Android allows one active VPN at a time, so the two will fight over it and the connection drops repeatedly. Uninstall the old app before switching.
Does it drain the battery?
A little more than being offline, which is expected. Rule mode is lighter than Global, and excluding CMFA from battery optimisation stops the system from killing the tunnel.