Compare each blocker by what it does, who it fits, and where free access ends. The shortlist covers built-in limits, configurable schedules, stricter controls, and a one-app pause—not five versions of the same tool.
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For most iPhone users, Apple Screen Time is the best free place to start. It is already installed and covers App Limits, Downtime, reports, and family controls. ScreenZen is the stronger dedicated option when you want several kinds of blocking and scheduling. one sec fits a narrower need: interrupting the automatic opening of one app.
We compared blocking style, free access, schedules, stricter controls, and the main limitation of each option. “Free” can mean included with iPhone, donation-supported, limited to one app, or merely free to download. This page makes that distinction explicit. For the wider paid-and-free iPhone market, use the full iPhone app blocker comparison.
| Need | Best fit from this list | Why |
|---|---|---|
| Best overall free starting point | Apple Screen Time | Built into iPhone with limits, Downtime, reports, and family controls |
| Best dedicated free blocker | ScreenZen | Donation-supported listing with delays, limits, schedules, and stricter modes |
| Best for stricter free controls | ScreenZen | Supports blocks based on time, app opens, or Screen Time |
| Best for scheduling | ScreenZen | Schedules can vary by day and time |
| Best for reducing one social-media habit | one sec | The free version can interrupt one selected app before it opens |
These are fit recommendations, not claims that one product wins every category. The right choice depends on whether you need native limits, configurable blocking, or a pause before one recurring app open.
| Option | Blocking style | Current free model | Main limitation |
|---|---|---|---|
| Apple Screen Time | Daily limits and scheduled Downtime | Included with iPhone | The device owner can change or extend self-set limits |
| ScreenZen | Delays, limits, schedules, and stricter blocks | Donation-supported free listing | More rules to configure and maintain |
| one sec | Pause before opening a selected app | Free for one app | Multiple apps require the paid plan |
| Jomo | Schedules, breaks, and configurable blocking | Free download; Plus is paid | The current free feature boundary must be checked in-app |
| Opal | Focus sessions and screen-time tools | Free download; Pro features are paid | The current free feature boundary must be checked in-app |
Jomo and Opal remain here as freemium comparisons, not as confirmed fully free recommendations. The best free tool is the one whose no-cost boundary still covers your actual problem after a week.
Screen Time is already on the iPhone. It offers daily App Limits, scheduled Downtime, Always Allowed apps, Content & Privacy Restrictions, reports, and family controls. There is no separate app subscription.
It is the right first test if you want a 30-minute social allowance or bedtime schedule. Use App Limits for a daily allowance. For scheduled restricted hours, use Downtime and turn on Block at Downtime. For a child, use Family Sharing rather than setting controls only on the child’s device.
The weakness for adult self-control is ownership: if you control the settings, you can change the rule. Screen Time is free and broad, but not automatically strict. If that is the gap, see a Screen Time alternative for stricter app blocking.
ScreenZen’s current US App Store listing calls it a free, donation-supported screen-time blocker. It lists delays before opening, short-use interruptions, app goals, blocking after a limit, schedules by day and time, custom messages, and stricter blocks based on time, opens, or Screen Time.
That makes it the strongest fit on this list for configurable schedules and stricter free controls. It suits someone willing to tune rules and experiment with several kinds of friction. The tradeoff is complexity: a large rule set can require more setup than a single rule.
Read the live ScreenZen App Store listing before installing, or use the Fella versus ScreenZen comparison for a closer look at their different blocking models.
one sec is built around interrupting an automatic open with a pause and optional follow-up intervention. Its current listing says the free version can be used with one app; protecting additional apps requires Pro.
That makes the free plan useful when one social app clearly dominates the habit. It is less suitable if Instagram, TikTok, Reddit, YouTube, and a browser all substitute for one another. It also adds a decision point rather than removing access completely.
Choose it when a moment of awareness is enough to change your action. For a direct comparison with a default-blocked model, read Fella versus one sec.
Jomo and Opal broaden the comparison beyond completely free tools, but neither is presented here as a confirmed fully free recommendation. “Free · In-App Purchases” does not mean every advertised feature is available without payment. Jomo’s listing advertises Plus subscriptions and a lifetime purchase. Opal also offers paid upgrades.
Install one only after defining the requirement: protected-app count, recurring schedules, strictness, breaks, analytics, and device coverage. Complete onboarding, then inspect the upgrade screen. For deeper product-level detail, see Fella versus Jomo or Fella versus Opal.
A free trial is not a permanently free blocker. If a card or auto-renewing plan is required, check the renewal terms before subscribing or choose an option whose free boundary is explicit.
Day 1: choose only the two or three apps that create the most unwanted time. Days 2–6: note every bypass, substitute app, missed essential task, and setting you changed. Day 7: decide whether the blocker changed behavior or merely added taps.
Check five things before paying: whether blocks start automatically, how emergency access works, whether settings can be locked, how many apps the free tier covers, and whether deleting or disabling the tool is visible or restricted.
Fella is not included as a free recommendation. It is a paid product for a narrower need: selected iPhone apps remain blocked by default, and each blocking session includes one 5-minute emergency unlock with automatic relocking. It is not a schedule builder, analytics suite, or free-plan substitute.
Want free + paid in one place? For a broad comparison that includes both free and paid iPhone blockers, see our best app blockers for iPhone.
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Apple Screen Time is built in and has no separate subscription. ScreenZen's current App Store listing describes it as a free, donation-supported blocker. The better choice depends on whether you want native limits or more configurable blocking.
Its current US App Store listing describes ScreenZen as free and donation-supported, with in-app purchases shown for support. Check the live listing because app plans can change.
one sec's current App Store description offers free use with one app; using it with multiple apps requires its paid plan.
No iPhone blocker should be described as impossible to bypass. Free tools vary in strictness, and the phone owner may still be able to change settings, use recovery, delete software, or find another route.
No. Fella is not presented as a free option. It is a paid, narrow blocker for selected apps with one 5-minute emergency unlock per session.
For some people, yes, especially if awareness or light friction is all that's needed. If the free tier's limits (one app, fewer schedules, softer blocking) keep leaving the same gap open, that's a sign the free plan isn't matched to the actual problem.
"Free" on an App Store listing often means free to download, with core blocking features gated behind a subscription screen shown after onboarding. Always check the live in-app purchase screen, not just the listing description.
