Watchly Our pick
Best overall for Mac — native app with true cross-platform sync
Watchly is a native Mac App Store app that syncs playback for HBO Max, so everyone in the room hits play, pause and seek at the same instant. It also includes push-to-talk voice chat, live reactions and text messages, so you don't need a second app on the side.
Its real edge is cross-platform sync: someone on a Mac can co-watch with a friend on an iPhone, iPad, Android phone or Chrome. The host shares a room link and friends join right from the browser with no account needed to watch along. HBO Max is a Pro service on Watchly, so hosting an HBO watch party needs Watchly Pro ($4.99/mo or $29.99/yr, with a 3-day free trial) — the same Pro plan also unlocks Disney+, Peacock and Apple TV+ and removes ads.
Pros
- Native Mac App Store app — no browser extension juggling
- Syncs Mac with iPhone, iPad, Android and Chrome
- Built-in voice chat, reactions and text
- Friends join from a link with no account needed
Cons
- HBO Max requires Watchly Pro ($4.99/mo)
- Everyone still needs their own HBO Max subscription