M3U vs Xtream Codes
Most providers hand out both, without explaining that they are the same content over two different mechanisms. The choice changes how fast the app opens, whether the line-up stays current, and whether you get a programme guide at all.
What an M3U playlist is
One text file listing every channel and its address. The player downloads all of it, then plays from the list. It is universal — every player made in the last twenty years reads it — and it is a snapshot: when the provider changes the line-up, your copy is stale until you refresh it.
What the Xtream Codes API is
A conversation instead of a file. The player asks for categories, then for the channels in the one you opened, then for a stream when you press play. Nothing is downloaded before it is needed, so the app opens at once however large the library is.
Where the difference shows
On a large subscription. Twenty thousand channels as a playlist is several megabytes parsed on every refresh; as an API call it is a category list. The API also carries structure a flat file loses — films and series as their own things, with seasons, episodes and often the programme guide.
Which to choose
Use Xtream Codes when your provider offers it. Use M3U when it is all you were given, when you are testing a trial, or when the playlist comes from something that has no API at all — your own file, a free public list, a home media server.
Common questions
How do I tell which one I was given?
A single long link, usually containing get.php, is a playlist. A short address plus a separate username and password is an Xtream account. A link with get.php contains the username and password inside it, so it can be turned into an Xtream login.
Do they give different channels?
No. Same account, same content, different route. If a channel is missing from one it is missing from the other.
Is one of them more private?
They are equivalent. Both send your credentials to the same provider. Neither involves the player's developer, because there is no account and no server in between.
Can I use both at once?
Yes. Tivsy treats each source separately, so you can add a work playlist, a home server and an Xtream account, and search across all of them.
Whichever you use, the app is the same empty player: it brings the interface, the guide and the resume, and you bring the source.