Free forever means no payment ever: Screen Time (Apple maintains it), Foqos (open-source, community-supported), ScreenZen (donation-supported). The compromise is rarely the blocking — it is support response, polish, and the durability question of who funds development. For a deeper free-only ranking, our free app blocker comparison owns that topic; this page stays on the no-subscription question broadly.
One-time lifetime unlocks mean one payment, no recurring charge, usually with future updates included. Noff (€9.99) is the cheapest verified lifetime here; Jomo and one sec ($99.99), AppBlock (~$149.99), Freedom's Forever plan, and Opal ($399) are the subscription vendors' exits. The compromise to check: platform coverage (does lifetime include Mac/desktop?), account requirements, and vendor durability — a lifetime deal lasts as long as the company does.
Hardware one-time cost (Brick, $59 device, per our Fella vs Brick comparison) moves the lock off the screen entirely: apps stay blocked until you physically tap. No subscription for the barrier itself — but confirm the companion app's current terms, since hardware and software pricing can differ.
When paying once makes sense
When you know the mechanism works for you (physical friction, fixed windows, strict schedules), when one device is the whole problem, and when you'd rather bet a small one-time amount than audit a subscription yearly. Noff's €9.99 is priced for exactly that bet.
When a subscription still makes sense
Subscriptions fund cross-device sync infrastructure, support teams, and continuous development — Freedom's multi-device sync and Opal's analytics are the visible results. If your habit spans phone plus computer, or you need support when something breaks, the recurring fee buys something real. Reject the model, not the math: compare the subscription's yearly cost against the lifetime exit from the same vendor (Jomo: $29.99/yr vs $99.99 once — the lifetime pays for itself in year four; Opal's $399 takes far longer).