Mast: Commitment App Blocker

Cut screen time, lock in focus

Only for iPhone

Free · In‑App Purchases

iPhone

Odysseus knew he couldn't resist the Sirens, so he had himself tied to the mast. Mast does the same for your phone. Screen Time limits are easy to dismiss. Mast is different: you create commitments, scheduled blocks where your distracting apps lock, and you decide up front what it takes to get them back. Your apps don't just come back when time passes. They unlock when you act. HOW IT WORKS 1. Choose the apps that steal your time: TikTok, Instagram, games, anything. 2. Schedule your commitments: study sessions, work hours, mornings, evenings. 3. Pick your unlock policy, what it takes to earn your apps back: • Photo: snap a photo to prove you did it: gym clothes on, books open, bed made • Timer: run down a focus timer before anything unlocks • Mark done: apps stay locked until you check the task off • Just wait: or simply lock yourself out for a set time WHY IT WORKS Psychologists call it a Ulysses pact: a binding decision you make now, while you're clear-headed, that your weaker future self can't undo. Willpower fails in the moment, so Mast removes the moment. When the commitment starts, the ropes are already tied. There's no "remind me in 15 minutes" to tap through, and the only way out is the one you chose yourself. • Powerful blocking built on Apple's Screen Time technology • Flexible schedules for study, work, sleep or a full digital detox • See the hours you've won back If you have any ideas or questions, please email us at hello@usemast.app. Terms of Use: https://usemast.app/terms

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Thank you for using Mast! What's new: • A much-improved profile: set a profile photo, edit your name, and manage notifications, permissions, and your subscription from dedicated screens • New Help & Feedback section so you can reach us directly from the app • Forgot your password? Reset it from the sign-in screen, or change it any time from your profile • Created a commitment by mistake? You can now undo it within 5 minutes, and we'll warn you before creating a commitment that locks your apps immediately • Faster Screen Time authorisation, smoother onboarding, and improved sign-in screens • Plus plenty of smaller fixes and polish throughout ~ Mast Team

Version 1.0.1

The developer, Thomas Bryden, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Purchases
    • Contact Info
    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Purchases
    • Contact Info
    • User Content
    • Identifiers
    • Usage Data
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
  • Thomas Bryden
Size
  • 84.7 MB
Category
  • Productivity
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
Languages
  • English
Age Rating
4+
In-App Purchases
Yes
  • Mast Plus - Yearly $49.99
  • Mast Plus - Weekly $7.99
  • Learn More
Copyright
  • © 2026 Tom Bryden
  • Developer Website
  • Privacy Policy