LayerStack’s Arm-based cloud virtual machines, powered by cloud-optimized CPU based on Arm architecture that deliver excellent cost-effective processing power, allowing you to easily complete the most demanding application development.

Opal.so
one sec
Freedom.to
Cold Turkey
LeechBlock
4rem Phone Lock
App Pause
Cognitive app & website blocker for iOS and Chrome that stops doomscrolling with adaptive math puzzles. Generous free tier (up to 3 limits for unlimited apps), 100% local privacy, optional one-time Lifetime Pro.

Website, pricing, platforms and company facts side by side.
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| Website | layerstack.com | novasynapse.com |
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| Company | — | Startup from Estonia · 2026 |
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In their own words, as submitted to SaaSHub.

No description of LayerStack Arm-based Cloud Server yet.
Scroll Brake is a native iOS (Screen Time / FamilyControls API) and Chrome Extension app & website blocker that replaces passive countdown timers with active cognitive friction — requiring you to solve adaptive mental math challenges before distracting feeds open. Key Capabilities Cognitive...
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As answered by people managing LayerStack Arm-based Cloud Server and Scroll Brake.
Scroll Brake's answer:
We noticed that standard app blockers fail in two ways: strict hard blocks force users to delete the blocker during an urgent message, while passive 5-second delays become invisible to muscle memory. Escalating mental math creates the exact cognitive pause needed to close the app voluntarily.
Scroll Brake's answer:
Native Swift, SwiftUI, Apple FamilyControls / ManagedSettings / DeviceActivity frameworks on iOS, and TypeScript / Manifest V3 for the Chrome Extension.
Scroll Brake's answer:
Instead of passive countdown timers or breathing animations that muscle memory learns to ignore within days, Scroll Brake uses active cognitive friction — requiring you to solve adaptive mental math puzzles (with escalating daily difficulty) before distracting apps or websites open.
Scroll Brake's answer:
Scroll Brake's answer:
Developers, students, founders, and knowledge workers with ADHD or high screen exposure who want to stop compulsive doomscrolling on iPhone and Chrome without surrendering their privacy or paying $100/year.
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