Build a local-first browser and Android blocker sold through a transparent one-time device license, with an optional paid filter-update plan that is never required for core use. The product should show a pre-purchase compatibility test, blocked-content counter, simple category controls, explicit renewal status, and self-service license management. Start with browser distraction and page-element blocking, then add Android-wide blocking only after the simpler product proves demand.

Recent reviews across several unrelated products show persistent resistance to subscription-only pricing and repeated distrust around trials, billing, and cancellation. A focused entrant can differentiate through ownership-style pricing, verifiable performance, and unusually clear account controls rather than another broad feature bundle.