Get the most out of CoreMaster.

Easiest via Google Play (recommended for devices with Play Store). For TV boxes without Play Store there is the direct APK on our download page – with a step-by-step guide and checksum.

Home → Sources → Add. Pick the type (Xtream, XUI.One, 1-Stream, M3U/M3U8 or Stalker) and enter your provider's credentials. CoreMaster ships no content – you connect only your own sources.

In the Add dialog tap “Fill in on your phone (QR)”: the TV shows a QR code, you scan it with your phone camera (same Wi-Fi) and type everything on the phone keyboard. The values jump straight into the TV form – the link works exactly once and nothing touches the internet.

Every new device gets a full 7-day trial – no account, no payment details. Afterwards you activate per device: 1 year or lifetime.

The bright focus ring always marks the active element. One press of Back always goes exactly one level up – all the way to the home screen.

OK/arrows reveal the bar and drive the buttons. With the bar hidden: left/right seeks in movies and series (hold = faster), M mutes, F cycles the aspect ratio.

Right in the running picture: with the bar hidden, Up switches to the next and Down to the previous channel of the current category – with a short channel overlay. The program keys (P+/P−) always zap, even via HDMI-CEC with your TV remote. On the phone: just swipe up or down on the video.

All forms open a dedicated full-screen input – no focus chaos with the on-screen keyboard. And for credentials there is the QR way via your phone (see Getting started).

Every list has instant search and sorting (default/A–Z). Search responds immediately, even with huge libraries.

Long-press a category (or use “Remember group”) to pin it on top. In Settings you can hide or lock categories and even switch off entire sections (e.g. series).

The “View” button sets tile size (small/medium/large) and how many entries load per page – ideal to tune lists for TV or tablet.

♡ bookmarks channels and titles; “Recently watched” and “Continue watching” fill automatically.

On reopening, the player offers “Continue from minute X”. Progress is saved every few seconds while playing.

CoreMaster remembers season and episode per series – the continue button jumps to the right spot across seasons.

On the target: Settings → Local network → “Make visible”. On the other device “Search device”, tap the target – both show the same 6-digit code, press OK on the target. Done, without typing anything.

“Transfer (Sync)” sends your sources and app settings to the paired device – a new box is set up in a minute. License, language and favorites stay per device on purpose.

On the movie page on your phone: “Stream to device” → pick the target (unpaired devices are paired right in the dialog) → press “Play” on the TV. The TV even takes over your continue-watching position – and fetches the stream itself afterwards, your phone can go to sleep.

Both devices must be on the same Wi-Fi and “Make visible” must stay open on the target. Some routers separate 2.4/5 GHz networks or have client isolation enabled – put both devices on the same network or disable isolation and search again.

Aspect ratio (original/fill/stretch) right in the player via F or the bar; seek steps (1×/2×/3×/6×) live in the player settings.

Subtitle size and color are adjustable; pick subtitle and audio track from the bar.

In player settings: Automatic (recommended), Force or Off. The info panel shows codec and active decoding mode live – handy for stutter diagnosis.

If 4K H.264 stutters on weaker boxes, the chip is usually at its limit. Tip: pick the HEVC (H.265) version of the same content – modern hardware decodes it far more efficiently.

Updates arrive automatically via the Play Store – nothing to do.

The app announces new versions on start (once per version) and installs them with one tap. Anytime manually: Settings → Info → “Check now” – that always gives feedback.

Your sources and credentials – encrypted and local only. CoreMaster has no source cloud and no user account; nobody can see what you watch.

Only license, trial and payment – per device, without an account. Pairing, syncing and streaming between your devices run entirely on your own Wi-Fi, serverless.

Close the app completely and restart it with internet – it re-syncs its license with the server automatically (also after a reinstall). If it persists: compare the device ID in the app with the one used at purchase and contact support.

Refresh the source with “Reload” and check the credentials. If a single title fails, it's almost always the source itself – try another title of the same category.

The start prompt appears once per version (dismissing counts as “later”). Settings → Info → “Check now” always works.

See Player fine-tuning → hardware decoding and the 4K/HEVC tip.