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Scroll Brake VS Nullstack

Compare Scroll Brake VS Nullstack and see what are their differences

Scroll Brake

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.

Rating
0 reviews
Pricing
Freemium $29 / One-off (Lifetime Pro Unlock (Free Forever tier included))
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Alternatives Is it good?
Nullstack

Full-stack Javascript Components for one-dev armies

Rating
0 reviews
Pricing
Open source
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Alternatives Is it good?
Monitask
Employee Monitoring Software with Screenshots, Internet, Activity and Time Tracking sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Website Blocking Software popularity
100% vs 0%
alternatives listed
15 vs 1

Base details

Website, pricing, platforms and company facts side by side.

Scroll Brake
Nullstack
Website novasynapse.com nullstack.app
Pricing
Freemium $29 / One-off (Lifetime Pro Unlock (Free Forever tier included)) Official pricing
Open source
Platforms
iOS Google Chrome
—
Company Startup from Estonia · 2026 —
Listed in
App Blockers Website Blocking Software Focus Personal Productivity Time Management Privacy-Focused +3
Framework JavaScript Tech Typescript +1

About Scroll Brake and Nullstack

In their own words, as submitted to SaaSHub.

Scroll Brake
Nullstack

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...

Read more about Scroll Brake

No description of Nullstack yet.

Features and specs

What each product offers, as listed by its team.

Scroll Brake 3 features
Nullstack 5 features
  • Cognitive Math Friction
    Interrupts automatic doomscrolling with adaptive mental math challenges
  • Escalating Daily Difficulty
    Math difficulty increases automatically on repeat unlock attempts
  • 100% On-Device Privacy
    Zero cloud servers, zero accounts, and zero telemetry via Apple Screen Time API & Chrome MV3
  • Full-Stack Capabilities
    Nullstack allows for the development of both client-side and server-side functionalities within a single project, providing a more unified development process.
  • Seamless SSR
    It offers built-in support for server-side rendering, improving performance and SEO without the need for complex configurations.
  • Zero tooling
    Nullstack provides a setup that requires minimal configuration and does not depend heavily on additional tools, simplifying the development workflow.
  • Component-based Architecture
    Promotes the use of components, encouraging modularity and reusability of code, which can improve maintainability and scalability of applications.
  • Hot Module Replacement
    Supports HMR, allowing developers to see immediate changes in their applications without refreshing the entire page, improving development efficiency.

Possible disadvantages

  • Smaller Community
    Compared to more established frameworks, Nullstack has a smaller community, which can result in fewer resources and third-party tools.
  • Learning Curve
    Developers need to learn the Nullstack-specific ways of handling both front-end and back-end development, which might be a hurdle for those accustomed to other frameworks.
  • Limited Ecosystem
    Due to its newer and less widely adopted nature, there might be limited third-party libraries and plugins readily available compared to more mature frameworks.
  • Rapidly Evolving
    Being relatively new and possibly evolving quickly, developers might face breaking changes more frequently compared to more established technologies.

Videos

Walkthroughs and reviews on video.

Scroll Brake 0 videos + Add
Nullstack 3 videos + Add

No Scroll Brake videos yet. You could help us improve this page by suggesting one.

Full-stack with Nullstack - Part 3

More videos

  • - nullstack ship tracker
  • - Como fazer um Hello World com Nullstack passo a passo

Category popularity

How often each product is chosen within a category, 0–100% relative to the other.

Score bands 0–20 21–40 41–50 51–60 61–100
Scroll Brake
Nullstack
100% 100%
Website Blocking Software
0% 0%
0% 0%
Framework
100% 100%
100% 100%
Time Management
0% 0%
0% 0%
JavaScript
100% 100%

Questions & Answers

As answered by people managing Scroll Brake and Nullstack.

What's the story behind your product?

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.

Which are the primary technologies used for building your product?

Scroll Brake's answer

Native Swift, SwiftUI, Apple FamilyControls / ManagedSettings / DeviceActivity frameworks on iOS, and TypeScript / Manifest V3 for the Chrome Extension.

What makes your product unique?

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.

Why should a person choose your product over its competitors?

Scroll Brake's answer

  • Cognitive System 2 Interruption: Arithmetic challenges break automatic dopamine scrolling loops.
  • 100% On-Device Privacy: Built on Apple Screen Time API (FamilyControls) and Chrome Manifest V3 with zero cloud servers and zero browsing logs.
  • No $99/Year Subscriptions: Generous Free Forever tier (up to 3 active limits covering unlimited apps) + optional $29.99 one-time Lifetime unlock.

How would you describe the primary audience of your product?

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.

User comments

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