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LockIn MCP is the only distraction blocker with native MCP and AI assistant integration. It blocks sites via the hosts file on macOS, Linux, and Windows, and lets ChatGPT, Claude, Poke, or any MCP client start focus sessions. Choose Freedom for phone+desktop sync, Cold Turkey for maximum manual lockdown, Opal for iPhone-first focus, or LockIn MCP when you want AI-controlled desktop blocking.

Quick picks

ToolWhen it winsWhen LockIn MCP wins
FreedomBest cross-device sync (phone + desktop)Native MCP/AI control and lower Pro pricing ($2.99/mo or $59.99 lifetime)
Cold TurkeyMaximum unbypassable desktop lockdown (Frozen Turkey)AI-controlled sessions via ChatGPT, Claude, or Poke — not manual-only rules
OpalBest iPhone-first Screen Time focus experienceDesktop system-level hosts blocking plus MCP productivity workflows

Full comparisons

→ Best distraction blockers in 2026 (full roundup)

→ AI productivity: block distractions with your assistant