ScreenZen vs One Sec:
a toolkit to configure, or one pause to trust

ScreenZen and One Sec both use friction rather than an outright block, but they hand you very different amounts of control. ScreenZen is a full toolkit: escalating delays, access windows, limits, schedules, goals, and stricter blocks you configure per app. One Sec does one thing, a short pause before a distracting app opens, and leans on a specific published result to back it.

This page compares the two products directly. For how either one stacks up against Fella specifically, see Fella vs ScreenZen or Fella vs One Sec, or read on for where Fella fits as a third option.

Both apps are asking the same underlying question: can a moment of friction change the habit? ScreenZen answers with more configuration and more places to tune the friction. One Sec answers with one specific, well-studied mechanism and less to set up.

ScreenZen lets you shape the friction per app. Delays, access windows, daily limits, opening goals, schedules, and strict blocks can each be configured differently, useful if different distracting apps need different treatment.

One Sec has almost nothing to configure. The pause appears before a distracting app opens, and the main variable is whether you set up Strict blocks with Cheat Locks. There's no delay length to tune, no schedule to build, no goal to set.

That's a real tradeoff, not just a feature gap. ScreenZen's flexibility is valuable when you want precise control. One Sec's simplicity is valuable when configuration itself becomes something to fiddle with instead of a habit to actually address.

One Sec has a specific, credible number behind it. The Max Planck Institute and Heidelberg University study, published in the Proceedings of the National Academy of Sciences, found the pause reduced social media app openings by roughly 57% on average, real published research, not marketing language.

ScreenZen's current materials don't cite an equivalent study. That doesn't mean its escalating delay and prompts don't work, ScreenZen's own design includes real, considered friction mechanics, but the specific evidence backing One Sec isn't something ScreenZen's current site independently documents for itself.

Worth weighing if evidence-backed claims matter to your decision. If you specifically want a product with a published result behind its core mechanism, that's a point in One Sec's favor. If configurability and cost matter more than citing a study, ScreenZen's toolkit stands on its own.

Choose ScreenZen if you want free, configurable control across more scenarios. Its delays, limits, schedules, and goals let you build different rules for different apps, at no cost.

Choose One Sec if you want a single, well-evidenced mechanism without much setup. Its pause is backed by a specific published study, and there's little to configure beyond deciding whether Strict blocks fit your situation.

Consider your own relationship with configuration. If more settings usually means more places you'll eventually loosen a rule, One Sec's simplicity may hold up better for you. If precise control genuinely helps you, ScreenZen's toolkit is the stronger fit.

ScreenZen and One Sec both leave the final decision with you in the moment. ScreenZen's delay eventually ends and lets you through; One Sec's pause can be clicked past. Both rely on the friction persuading you, not physically stopping you.

Fella removes that moment of decision entirely. Selected iPhone apps stay blocked from the first open, with no delay to wait out and no pause to act on. One 5-minute emergency unlock per session is the only exception, and it relocks automatically.

The right pick depends on whether friction usually works for you. If a delay or a pause reliably makes you reconsider, ScreenZen or One Sec already does that job well, for free or for a small subscription. If you've noticed yourself waiting out the delay or breathing through the pause anyway, that's the gap Fella is built for. See how Fella works or current pricing.