Okay, so this is actually a huge pain point for a ton of people right now. There are like a dozen web novels with some variation of 'Dragon Master' in the title, and they're all over different platforms. The real trick is figuring out which specific one you're after. Is it the cultivation story where the MC tames ancient dragon spirits, or the VRMMO LitRPG one, or maybe that romance-fantasy about a dragon rider academy?
Once you pin that down, your options split. For official, legal chapters, Webnovel (Qidian) and NovelUpdates are your best starting points for discovery. They'll list the official source, which is often an app. Those apps usually have a 'read for free' model using daily passes or ad-watching to unlock chapters, but it's a grind. The first 30-50 chapters are frequently free as a sample to hook you.
Then there's the... other side. Aggregator sites. They scrape content, often have all chapters up fast, but the translations can be machine-garbage, full of pop-up ads, and they literally steal from the authors. I get the frustration with slow unlocks on official apps, but clicking those shady sites just tells the publishers we don't value the work at all. My personal rule is to use an aggregator ONLY to find which official platform a story is on, then jump ship. The comment sections on those pirate sites are weirdly active though, I'll give them that.