LENGO is a language learning app for more than 25 languages. It’s made by Nils Bernschneider, a friend and fellow indie app developer.With our new free integration, one sec forces you go through a quick vocab exercise before you can use social media.<img src="https://67a2a5955e92fab9e3aa313b.featurebase-attachments.com/c/article/69b82eb5dce49f807a56d629/019cf777-bbc2-7df6-9d08-0b5b823ecc75/b64u-MDE5Y2Y3NzctYmIyNy03ZWNjLTkwNDYtZDFjNjEzMzMxNTJm.png?X-Amz-Expires=3600&amp;X-Amz-Date=20260522T220000Z&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=DO801TYC4FCVNNEKURKM%2F20260522%2Ffra1%2Fs3%2Faws4_request&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Signature=de2195be7136e9b42a7d1e259fe56cd76f495bdebd6e765c6b765ac4ee1b2a61" data-width="100%" data-align="left" alt="" data-featurebase-content-key="67a2a5955e92fab9e3aa313b/article/69b82eb5dce49f807a56d629/019cf777-bbc2-7df6-9d08-0b5b823ecc75/b64u-MDE5Y2Y3NzctYmIyNy03ZWNjLTkwNDYtZDFjNjEzMzMxNTJm.png" data-featurebase-content-filename="019cf777-bb27-7ecc-9046-d1c61333152f"><h2 id="65pror606s6" data-toc-id="65pror606s6">How to link LENGO with one sec</h2>First, make sure that you’ve installed the latest updates of <a target="_self" rel="noopener noreferrer nofollow" class="kb-link kb-link link" href="https://lengo.io/">LENGO</a> (v1.9.10) and <a target="_self" rel="noopener noreferrer nofollow" class="kb-link kb-link link" href="https://one-sec.app/?qu=lengo">one sec</a> (v3.7) from the App Store. Then, open one sec → Customize → LENGO Integration. Enable the LENGO Integration and select the language you’d like to learn.<img src="https://67a2a5955e92fab9e3aa313b.featurebase-attachments.com/c/article/69b82eb5dce49f807a56d629/019cf777-fde8-7339-954c-3fda550ad322/b64u-MDE5Y2Y3NzctZmQ4Ni03ZWNjLTg1NDEtNjJjNjc3MjkzOTAz.png?X-Amz-Expires=3600&amp;X-Amz-Date=20260522T220000Z&amp;X-Amz-Algorithm=AWS4-HMAC-SHA256&amp;X-Amz-Credential=DO801TYC4FCVNNEKURKM%2F20260522%2Ffra1%2Fs3%2Faws4_request&amp;X-Amz-SignedHeaders=host&amp;X-Amz-Signature=4647a425fe32b3a4a8c72744874c3e5c40f3b018f88435cde4ae0482486579cd" data-width="100%" data-align="left" alt="" data-featurebase-content-key="67a2a5955e92fab9e3aa313b/article/69b82eb5dce49f807a56d629/019cf777-fde8-7339-954c-3fda550ad322/b64u-MDE5Y2Y3NzctZmQ4Ni03ZWNjLTg1NDEtNjJjNjc3MjkzOTAz.png" data-featurebase-content-filename="019cf777-fd86-7ecc-8541-62c677293903">You can configure much more about the intervention behavior, such as the amount of vocabulary required to complete the intervention, the frequency, … Happy learning!

Learn how to link the Lengo language learning app with one sec. Replace distracting interventions with quick vocabulary exercises to learn a new language while you use your phone.

Lengo ↔️ one sec Integration [iOS]

Feedback

Roadmap

Set up and use one sec on your iPhone or iPad. Covers Shortcuts, Screen Time, interventions, blocking, and troubleshooting.

Install one sec and set up your first app with Shortcuts and Screen Time.

Getting Started (iOS)

Step-by-step guide to setting up one sec on iOS 17+. Learn how to create personal automations in the Shortcuts app to activate interventions and break impulsive habits when opening social media apps.

Initial one sec Setup on iOS (iOS 17+)

Download one sec for your iPhone or iPad and start your journey toward a more intentional and less distracted relationship with your device.

one sec for iPhone and iPad

Fix issues with interventions, Screen Time API, battery usage, and known bugs.

Troubleshooting

Having trouble with app shielding or the Screen Time picker? Learn about known iOS bugs affecting the Screen Time API and find workarounds for crashes, inconsistent shielding, and permission issues.

Screen Time API Issues & Known Bugs [iOS]

Experience delays with your one sec automations? Learn about the performance improvements in the latest iOS versions and how to fix slow shortcut triggers.

Shortcut Automations are Slow [iOS]

Avoid seeing a brief glimpse of your target app before the intervention triggers. Learn how to replace app icons with one sec shortcuts for a faster and cleaner experience.

Prevent target app preview (Avoid the “Glimpse”) [iOS]

Is one sec not triggering when you open a target app? Follow this step-by-step guide to debug the issue using the built-in debug banner and verify your iOS Shortcut settings.

Intervention not showing up when it should [iOS]

Is your target app opening and closing in an endless loop? Learn how to fix a common configuration error in the Apple Shortcuts app to restore normal one sec behavior.

Stuck in an endless loop [iOS]

Learn how to use a custom Shortcut to open apps that don't have a native URL scheme. This workaround ensures one sec can always redirect you back to your target app.

App doesn't have a URL Scheme? Use this workaround! [iOS]

Are your one sec notifications (e.g., for Re-Interventions or Emotion Tracker) arriving with a delay? Learn how to disable Apple Intelligence features like 'Summarize' and 'Priority' to restore instant delivery.

Notifications Delayed or Slow [iOS]

Is your Phone-Free Morning block not triggering? Learn why HealthKit sync might be slow and how to set up a reliable alternative using your morning alarm.

Phone-Free Morning / Good Morning Countdown not Working? [iOS]

Is one sec showing unusually high background activity in your battery settings? Learn why this is a known iOS display side-effect and how to verify the actual battery impact on your device."

Extremely high background usage / Battery Life [iOS]

Are your one sec Re-Interventions failing to trigger? Follow this quick guide to reauthenticate Screen Time permissions and learn about known iOS 26 system glitches affecting this feature.

Re-Intervention not working [iOS]

Does one sec trigger every time you take a screenshot on iOS 26? Learn how to adjust your system settings or use 'Intentional App Switching' to prevent unwanted interventions.

Intervention triggers again after taking a screenshot on iOS 26

Block apps and websites, schedule blocks, lock settings, and prevent bypassing.

Blocking & Discipline

Learn how to schedule your one sec interventions on iOS. Set specific active hours or create an individual schedule for each day of the week to match your routine.

Scheduling of Interventions [iOS]

Learn how to set up a Phone-Free Morning on iOS. Use your Apple Health sleep data to automatically block distracting apps for a set time after you wake up, ensuring a mindful start to your day.

Phone-Free Morning [iOS]

Learn how to set up Recurring Blocks on iOS. Unlike standard interventions, these blocks completely prevent access to distracting apps during specific hours, showing a blocking shield instead.

Recurring Blocks [iOS]

Learn how to enable the Adult Content Detox on iOS to block adult content across all web browsers. Discover how to lock your settings for long-term discipline and understand the system-level privacy of this feature.

Porn Blocker – Adult Content Detox [iOS]

Learn the various ways to completely block apps and websites on iOS using one sec—from manual Quick Blocks and Control Center toggles to automated schedules.

Block Apps & Websites [iOS]

Learn how to protect your focus by preventing the deletion of one sec and locking your settings. From internal app locks to system-level restrictions, discover how to stay disciplined.

Prevent Deleting one sec & Bypassing Interventions [iOS]

Find yourself tempted to disable your one sec automations? Learn how to lock the Apple Shortcuts app to prevent your 'short-term self' from bypassing your focus goals.

Prevent Deleting or Disabling Automations [iOS]

Stop your 'short-term self' from disabling one sec's permissions during a strict block. Learn how to set up an automation that locks the iOS Settings app whenever a block is active.

Lock Screen Time Permissions (Prevent Cheating) [iOS]

Journaling, Focus Filters, Dynamic Island, integrations, custom apps, and more.

Features & Extras

Learn how to set up and use Intention Tracking on iOS to add an extra layer of reflection before opening distracting apps, helping you stay focused on your actual goals.

Intention Tracking [iOS]

Learn how to enable and use the Journaling feature in one sec for iOS. Replace your morning or evening doomscrolling with mindful reflection using the Emotion Explorer and custom journal prompts.

Journaling [iOS]

Learn how to set up Healthy Alternatives in one sec for iOS. Display custom activities, hobbies, or alternative apps during interventions to motivate you to spend your time more mindfully.

Healthy Alternatives [iOS]

Learn how to use Apple's Focus Filters to automatically modify one sec's intervention behavior based on your active Focus mode. Make interventions longer, disable them, or block apps completely.

Focus Filters [iOS]

Learn how to set up 'Don’t get lost' reminder notifications on iOS. Stay mindful while using apps and configure sticky banners, Focus mode overrides, and Apple Watch settings.

“Don’t get Lost” Reminder Notifications [iOS]

Learn how to use the Dynamic Island on your iPhone to display your app usage time and your intention in real-time while using distracting apps.

Dynamic Island Timer [iOS]

Learn how to link the Structured planner app with one sec. Block distracting apps during active tasks until they are completed and see your upcoming schedule as healthy alternatives.

Structured ↔️ one sec Integration [iOS]

Learn how to set up Re-Interventions on iOS using the Screen Time API to interrupt doomscrolling and limit your time spent on target apps.

Re-Intervention [iOS]

Learn how to set up intentional app switching on iOS using Shortcuts. This allows you to quickly switch between apps for productive reasons without triggering a new intervention.

Intentional App Switching [iOS]

Learn about the different intervention modes in one sec for iOS: Immediate, Delayed, and Always Ask. Find out which mode works best for your habits and how to configure them.

Delayed Interventions [iOS]


Customize interventions, Re-Interventions, app switching, and intervention modes.

	Configuration

Learn how to customize interventions in one sec for iOS. Choose from different exercises like breathing, rotate phone, or follow the dot, and adjust durations and phrases to fit your needs.

Customize the Intervention [iOS]

Learn how to set up and enable the one sec Safari extension on your iPhone or iPad to intervene and block distracting websites directly in your mobile browser.

Setting up the Safari Extension [iOS]

Learn how to easily add specific websites to your one sec interventions on your iPhone or iPad using the Safari extension.

Add Websites to Intervention [iOS]

Learn how to add custom apps to your one sec intervention list on iOS if they are not included by default. Find out how to use URL schemes to configure any app.

Adding Custom Apps [iOS]

Want to use one sec in your native language? Learn how to change the app's language settings on your iPhone or iPad.

How can I change one sec’s language? [iOS]

Running one sec on Progressive Web Apps (PWAs) isn't natively supported by iOS, but it is possible with a clever workaround. Follow this expert guide to set up interventions for your home-screen web apps.

Using one sec with Progressive Web Apps (PWAs) [iOS]

Understand the different intervention types in one sec. Whether you want to pause before opening an app or limit your session time afterward, find the perfect mode for your habits.

Immediate vs. Delayed vs. Always Ask – which one is the right intervention mode for me?

How to create new block categories (for automations in Shortcuts) [iOS]

Set up and use one sec on your Android device. Covers permissions, battery optimization, and manufacturer-specific settings.

Android

Install one sec, grant permissions, and configure background settings for your device.

Getting Started (Android)

Step-by-step guide to setting up one sec on your Android device. Learn how to correctly grant the required Accessibility and App Overlay permissions to enable interventions for your distracting apps.

Initial one sec Permission Setup on Android

Download one sec for your Android device and learn how to set up the necessary permissions to start breaking your mindless scrolling habits.

one sec for Android

Fix issues with permissions, virus scanner alerts, split-screen, and purchases.

Having trouble upgrading to one sec pro on Android? If purchase options are missing or grayed out, learn how to resolve Google Account connectivity issues and restore the upgrade path.

Cannot purchase one sec pro [Android]

Is your Android device or anti-virus app (like Avast) flagging one sec as a threat? Learn why this is a 'false positive' and how to safely proceed with the app.

Flagged by Android Virus Scanner (False Positive)

Is one sec not working on your Android device? Many manufacturers use aggressive battery-saving techniques that stop one sec from running. Find the specific settings for your phone model (Samsung, Xiaomi, Huawei, etc.) here.

one sec not triggering (Additional Background Settings) [Android]

Is one sec not triggering on your Android device? Check this guide to verify accessibility permissions, disable battery optimization, and troubleshoot common background issues.

Intervention not showing up when it should [Android]

one sec intervention opens in split-screen / multi-window

Prefer not to use Android's Accessibility Service? Learn how to set up one sec using the 'App Usage Access' legacy method and understand the trade-offs in performance and stability.

Can I use one sec without the Accessibility Permission?

Is one sec compatible with my phone?

Customize interventions, Re-Interventions, and remove in-app distractions like Reels.

Configuration & Features

Learn how to customize the intervention duration and text phrases for your blocked apps in one sec for Android.

Customize the Intervention [Android]

Learn how to enable intentional app switching on Android. Quickly leave and return to your configured apps without triggering another intervention.

Intentional App Switching [Android]

Learn how to set up Re-Interventions on Android. Automatically interrupt your scrolling sessions after a set time limit and regain focus.

Re-Intervention [Android]

Learn how to block specific distracting features within apps, like Instagram Reels or YouTube Shorts, on your Android device using one sec.

Remove In-App Distractions (Reels, Shorts, …) [Android]

Use one sec on Chrome, Firefox, Edge, Brave, or Safari to block distracting websites on your computer.

Browser

Getting Started (Desktop Browser Extension)

Learn how to install and set up the one sec browser extension for Google Chrome, Mozilla Firefox, Microsoft Edge, and Arc. Available cross-platform for macOS, Windows, and Linux.

Installing and Setting up the one sec Browser Extension

Step-by-step guide on how to install and enable the one sec browser extension for Safari on your Mac via the Mac App Store.

Installing the one sec Safari Extension

Learn how to access the one sec Browser Dashboard to add new websites, customize intervention durations, and adjust website-specific behaviors.

Customize the Intervention [Browser]

Learn how to add new websites to your one sec desktop browser extension, customize intervention settings, and allow specific sub-domains for productive work.

Add Websites to Intervention [Browser Extension]

Configure your one sec browser extension to allow intentional website switching, letting you temporarily leave and return to a blocked tab without a new intervention.

Intentional Website Switching [Browser]

Enable Re-Interventions in the one sec browser extension to automatically interrupt long browsing sessions and stop doomscrolling on distracting websites.

Re-Intervention [Browser]

Install the one sec browser extension for Chrome, Firefox, Edge, or Opera to break your mindless browsing habits on any computer.

one sec for Desktop Browsers (Chrome, Firefox, Edge...)

macOS

Download one sec for macOS to intervene in both native desktop apps and websites. Learn how to set up the Safari extension included with the Mac app.

one sec for Mac

Bring the power of one sec to your workstation. Learn how to install our browser extensions for Chrome, Firefox, and Safari, or download our native Mac app to block desktop applications.

Can I use one sec on my computer as well?


See what's coming next, vote on features, and share your ideas with the one sec team.

Feedback & Roadmap

Provide Feedback

Upcoming Features


Manage your one sec Pro subscription, billing, invoices, and family sharing.

Account & Membership

Upgrade to Pro, cancel your subscription, get invoices, or buy for your team.

Subscription & Billing

Discover the benefits of one sec pro. From unlimited apps and website blocking to advanced re-interventions and privacy-first focus—learn what you get when you upgrade.

What’s included in one sec pro?

How do I cancel my subscription?

Can I buy one sec for my team / school?

How can I get an invoice for my purchase?

Set up Apple Family Sharing and manage access for family members.

Family & Access

Having trouble sharing your one sec pro subscription with family members? Follow this guide to verify your plan eligibility and ensure your Apple Family Sharing settings are configured correctly.

Apple Family Sharing Troubleshooting [iOS]

How can we help you?

Help Center

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♾️ All Platforms

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Universal Roadmap

iOS Roadmap

Android Roadmap

MacOS Roadmap

Browser Extension Roadmap

— Lucas Customer Support • Blog one sec app · <a target="_blank" rel="noopener noreferrer nofollow" class="link" href="http://riedel.wtf">riedel.wtf</a> apps S.L. · Riera Principal 8 · 08328 Barcelona · Spain<a target="_blank" rel="noopener noreferrer nofollow" class="link" href="mailto:info@one-sec.app">info@one-sec.app</a> · VAT-ID: ESB56693781 · CEO: Frederik Riedel

 apps S.L. · Riera Principal 8 · 08328 Barcelona · Spain

 · VAT-ID: ESB56693781 · CEO: Frederik Riedel

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