Why blocking LINE specifically
LINE is not just a messaging app. It is closer to a super-app: one tap from your friend's message to a news feed (LINE TODAY), a short-video surface (VOOM), a sticker shop, a games tab, a payments wallet, and a mini-app platform. This architecture is by design. The more surfaces inside the app, the more reasons the OS has to send a notification, and the more likely you are to open it for one reason and leave 20 minutes later having done something else entirely.
The notification loop is the core problem. A sticker reply from a friend, a LINE NEWS breaking alert, a VOOM post from a brand account you followed once -- each one is a separate push notification that opens the same app. For many users in markets where LINE is the default communication layer, turning off notifications entirely is not an option. Selectively muting the non-essential categories while keeping one-to-one and group message alerts is the realistic middle path.
Unlike TikTok or Instagram, LINE is harder to remove because removing it severs contact with people who use it as their primary channel. The right frame is almost never "block LINE completely" -- it is "block the passive-consumption surfaces inside LINE and cap total daily time." The five methods below reflect that distinction.
Method 1: App Limit
How: Settings > Screen Time > App Limits > Add Limit > (uncheck all) > expand "Social" > check LINE > Next > set time (30 minutes, 45 minutes, or whatever reflects an honest daily need) > Add.
Strength: 2/10 without a passcode; 7/10 with one. The "Ignore Limit For Today" button bypasses this in two taps. A passcode you do not know eliminates that button.
LINE-specific note: consider setting the limit to your realistic messaging time rather than an aspirational low number. If your team communicates on LINE and you genuinely need 40 minutes per day, set 40. An unreachable limit defeats itself -- you ignore it once and the habit of ignoring it forms quickly.
When to use: first attempt, audit phase. The data Screen Time generates in the first week is often more useful than the limit itself. You will learn where the time actually goes inside LINE -- messaging vs feed vs sticker browsing.
Method 2: Screen Time passcode
How: Settings > Screen Time > Use Screen Time Passcode > set a 4-digit code different from your unlock code. Then set the App Limit from Method 1. Ask a trusted person to set the code on your behalf without telling you what it is.
Strength: 5/10 if you know the passcode; 9/10 if you do not. With the passcode held by someone else, the "Ignore Limit" button shows a passcode prompt you cannot satisfy. The only bypass is asking your contact for the code, which is a friction-bearing social interaction rather than a two-tap override.
LINE-specific note: if the concern is emergency messaging access, set the limit high enough to cover genuine usage (say, 45-60 minutes) and only lock the overage. You should never be in a situation where an important message is blocked because you hit your self-imposed limit.
When to use: after Method 1 has failed. This is the cheapest hard commitment device that exists. No subscription, no hardware -- just a relationship with someone who cares enough to hold the code.
Method 3: Mute notifications and disable LINE TODAY / VOOM
How (notification triage inside LINE): LINE app > Settings (gear) > Notifications. Disable "LINE NEWS," "VOOM," "Timeline," "Stickers," "Coin," and any service alert categories you do not need. Keep "Messages" and "Group messages" on. This reduces notification volume substantially without touching messaging.
How (turn off LINE TODAY / VOOM): LINE app > Settings > Privacy > "Information provided to LINE." Turn off personalized content settings. Also: on the main LINE tab bar, long-press the "VOOM" tab if your version allows tab reordering and move or hide it. Some LINE versions let you hide tabs via Settings > Home > Display Items -- uncheck VOOM, News, and Wallet if you do not use them. The fewer tabs visible, the less passive surface area.
How (iOS notification filter): iOS Settings > Notifications > LINE > turn off "Allow Notifications" entirely if you have an alternative channel for urgent messages, or switch to "Deliver Quietly" so alerts arrive in Notification Center without badge counts or sounds.
Strength: 6/10. This is the LINE-specific method that most guides skip because it requires in-app changes rather than OS-level controls. Notification-driven checking is often the whole problem -- if you are opening LINE 30 times a day in response to alerts, removing alerts removes the trigger. The feed and VOOM surfaces do the rest of the damage when you are already inside.
When to use: in parallel with any other method. Think of this as reducing the supply of triggers rather than the demand for the app. Even if Method 1 or 2 is your primary lever, doing Method 3 first reduces how often you are tempted to open LINE in the first place, which makes the limit easier to stay under.
Method 4: Content Restrictions (block install)
How: Settings > Screen Time > Content & Privacy Restrictions > (turn on) > iTunes & App Store Purchases > Installing Apps > Don't Allow. Delete LINE after enabling this. The app cannot be reinstalled until the restriction is removed, and removing the restriction requires the Screen Time passcode.
Web fallback note: LINE's web app at line.me is minimal -- it does not replicate the full messaging experience. Blocking the native app is therefore a more meaningful cut than it would be for, say, a service with a full-featured web version. That said, some users will adapt to the web version, so if this is a concern, add line.me to the blocked websites list under Web Content in Screen Time.
Strength: 7/10 alone; 10/10 combined with a Screen Time passcode you do not control. The app cannot be reinstalled without the passcode, and the web version is too limited to replace daily messaging for most users.
When to use: when the goal is an extended period off LINE and you have an alternative way to reach the people who matter (SMS, phone calls, email, or a separate device). This is not realistic for users in markets where LINE is the default communication layer for work groups or family. For those users, Methods 1-3 are the more practical path.
Method 5: Add a verified-exercise consequence
How: Set a daily phone-time limit in iOS Screen Time (e.g., 60 min/day total or a higher number that accounts for legitimate LINE messaging). Install ScreenFine ($1/week subscription). When you go over your daily limit, ScreenFine logs a fine -- 25 pushups per 15-minute overage block -- tracked via camera-counted reps. LINE time counts toward the total. You can pause the jar at any time from settings, so there is always an exit, but the pause requires a deliberate action rather than a two-tap dismiss.
Strength: 8/10. The consequence is physical and immediate rather than monetary, which matters for behavioral change. The pushup count is camera-verified, so the consequence is real rather than honor-system. The pause-at-any-time design means you are never locked out -- the mechanism works through friction and accountability rather than hard blocking.
LINE-specific note: because LINE is often essential communication, the daily limit you set should reflect your actual minimum messaging need, not an aspirational low number. If you genuinely need 45 minutes for work and family messages, set the limit at 45 and let ScreenFine enforce the overage. The goal is capturing the passive-consumption drift above your legitimate use, not penalizing necessary communication.
When to use: when Methods 1-4 have failed, or when you want a structural commitment device rather than a passcode-held-by-someone-else relationship. Loss aversion -- the fact that a concrete cost hurts more than an equivalent gain feels good -- is the mechanism that makes this work when willpower-based methods do not. See the loss aversion guide for the underlying research.
Which method should you pick?
- First attempt: Method 3 (mute notifications and disable VOOM / LINE TODAY) + Method 1 (App Limit). Do both simultaneously. Reducing triggers and capping time together is more effective than either alone.
- If Method 1 fails within a week: Method 2 (passcode held by someone else). Cheapest escalation. Set the limit at a number that covers your genuine communication need.
- If LINE is non-essential in your context: Method 4 (Content Restrictions, install blocked) + delete the app. 14-day experiment to see whether you actually need it or just feel like you should have it.
- If you need LINE for work/family but cannot stay under your limit: Method 5 (verified-exercise consequence). Hard commitment device calibrated to your actual usage, not an arbitrary number.
- If 1-4 have all failed: Method 5 combined with Method 2. Passcode for the override and a physical consequence for the overage. Two layers that address different bypass routes.
The distinction that matters for LINE specifically: most people who struggle with LINE time are not addicted to messaging -- they are addicted to the feed and notification loop that surrounds the messaging. Separating the signal (conversations) from the noise (VOOM, LINE TODAY, sticker promotions, badge counts) is often enough to solve the problem without needing to block the app at all. Method 3 is underrated because it addresses the actual mechanism rather than the symptom.
The honest read on when to escalate: if you have tried a method three times and bypassed it each time, that method does not work for you and you should move to the next level. Three failures is a signal about the strength of the habit, not a failure of willpower. Escalating to a harder method is rational, not a sign of weakness.