Report updated May 26, 2026

TL;DR:Userscripts is an open-source Safari extension for iOS and macOS that enables users to run custom JavaScript and CSS on websites. Users feel Excited, praising utility and functionality but frustrated by script persistence issues. Userscripts is the gold standard for privacy-conscious developers, but it is currently losing the 'ease-of-use' battle to Stay.|TL;DR:Userscripts is an open-source Safari extension for iOS and macOS that enables users to run custom JavaScript and CSS on websites. Users feel Excited, praising utility and functionality but frustrated by script persistence issues. Userscripts is the gold standard for privacy-conscious developers, but it is currently losing the 'ease-of-use' battle to Stay.
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Userscripts is a well-regarded developer tools app that is completely free. With a 4.4/5 rating from 173 reviews, it maintains solid user satisfaction. Users particularly appreciate utility and functionality, though script persistence issues remains a common concern.

What is Userscripts?

Userscripts is an open-source Safari extension for iOS and macOS that enables users to run custom JavaScript and CSS on websites. It targets power users and developers, positioning itself as a privacy-first, non-commercial alternative to mainstream script managers. Its primary differentiator is its complete lack of user tracking and its open-source transparency, which has fostered a loyal, high-trust user base. Despite its technical utility, it faces stiff competition from commercial rivals like Stay, which offer more polished interfaces and integrated script discovery features.

Current Momentum

v1.8 · 3mo ago

Maintenance

Userscripts recently optimized memory usage and resolved iOS crash issues in version 1.8.6. The app is currently in maintenance mode with no recent major feature updates.

AI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.

Active Nemesis

Stay Slim, Weight Loss - Hypnosis & Meditation

Stay Slim, Weight Loss - Hypnosis & Meditation

By Hypnosis & Subliminal

Other Rivals

Tampermonkey
Inspect Browser
AdGuard Pro: Safari Ad Blocker
Web Inspector & Dev Tools

7-Day Rank Pulse 🇺🇸

Developer Tools
#30
2

Rating Pulse 🇺🇸

Recent User MoodAI-powered deep analysis surfacing high-signal insights. Still in beta, accuracy improves daily. For informational purposes only.

What makes this app unique?

What Does It Look Like?

How Is The App's Momentum Right Now?

Loading...

What Are The Key Features?

Custom Script InjectionStandard

Allows users to save and run arbitrary JavaScript and CSS code for specific websites

Privacy-First DesignDifferentiator

Open source architecture with no user tracking or data collection

Remote Script SupportDifferentiator

Ability to add and automatically update remotely hosted userscripts via metadata tags

Cross-Device SyncStandard

Supports syncing scripts between macOS and iOS via iCloud folders

Built-in Code EditorStandard

Integrated editor with features like auto-hint, linting, and syntax highlighting for macOS

How much does it cost?

Free
  • Completely free and open source

The app is distributed as a free, open-source tool with no monetization, relying on community contributions and positive App Store reviews for support.

Who Built It?

Justin Wasack app icon

Providing power users with open-source tools to customize their web browsing experience through privacy-first script management.

Portfolio

1

Apps

Who is Justin Wasack?

Justin Wasack occupies a niche position as an open-source developer providing a transparent, non-commercial alternative to mainstream browser extension managers. The primary moat is the project's commitment to a zero-tracking policy, which builds significant trust among a technical audience wary of data-harvesting in the utility category. This developer-centric positioning allows the project to maintain high user sentiment without the need for traditional monetization or aggressive user acquisition.

Who is Justin Wasack for?

  • Web developers
  • Privacy-conscious power users seeking to customize browser behavior on iOS
  • MacOS
Maintenance

Portfolio momentum

Maintains a single active utility with one update released in the last 6 months.

Last release · 102d agoActive apps · 1

What do users think recently?

High confidence · Latest 100 of 172 total reviews analyzed · Based on 172 reviews. Signal may be noisy.

How did the latest release land?

Overall
4.4/ 5
(173)
Current version
4.4/ 5
0.0 vs overall
(173)
Main signal post-update: utility and Functionality.

What is the recent mood?

Excited

Recent user voice shows a excited sentiment. Users appreciate utility and functionality and open source and free, but report script persistence issues and installation and setup difficulty.

What Users Love

Utility and Functionality
Open Source and Free

What Frustrates Users

Script Persistence Issues
Installation and Setup Difficulty

What is the competitive landscape for Userscripts?

How's The Developer Tools Market?

How does it evolve in the Developer Tools market?

ChartRankChange
iOSFree#256
iOSFree#4123
No rank history available for this chart.

The rivals identified

The Nemesis

Stay Slim, Weight Loss - Hypnosis & Meditation

Stay Slim, Weight Loss - Hypnosis & Meditation

3.0 (2)

Hypnosis & Subliminal

💀

Stay is the most direct commercial rival, offering a polished, feature-rich Safari extension specifically designed for userscript management with a significantly larger active user base.

Head to Head

Stay currently holds the market edge due to its superior script discovery and polished UI, but Userscripts remains the preferred choice for privacy purists and developers who demand an open-source, non-commercial tool.

What sets Userscripts apart

  • Completely free and open-source with no monetization or 'Pro' tiers

  • Privacy-first architecture with zero user tracking or data collection

What's Stay - Userscript Manager's Edge

  • Significantly higher rating count (~1.7k vs 172) indicating broader market adoption

  • Built-in 'Stay Fork' community for sharing and downloading scripts directly

Peers

Full DOM inspection and console access on mobile

Standalone browser environment rather than a Safari extension

AdGuard Pro: Safari Ad Blocker

AdGuard Pro: Safari Ad Blocker

4.4 (2.9K)

Adguard Software Limited

While primarily an ad-blocker, its advanced userscript support makes it a common tool for users looking to manipulate web content.

Massive scale and brand recognition in the privacy space

Focus on content filtering and security over general-purpose script execution

New Kids on the Block

Web Inspector & Dev Tools

Web Inspector & Dev Tools

5.0 (1)

VISUAL MOBILE SOFTWARE S.R.L.

A newer, lightweight Safari extension that brings desktop-class developer tools (including script execution) to mobile Safari.

Focuses on real-time debugging and inspection rather than persistent script management

Modern, native iOS interface designed for quick edits

The outtake for Userscripts

Strengths to defend, gaps to attack

Core Strengths

  • Open-source transparency and high user trust
  • Completely free with no monetization or 'Pro' tiers
  • Privacy-first architecture with zero data collection
  • Cross-device synchronization via iCloud

Critical Frictions

  • Script persistence bugs where scripts stop running automatically
  • High friction in initial setup and script installation
  • Lack of a built-in script discovery/gallery interface
  • Limited mobile editor capabilities compared to desktop

Growth Levers

  • Integrate a curated, privacy-vetted script gallery to compete with Stay
  • Improve onboarding flow to reduce 'stuck' users
  • Market specifically to privacy-conscious users fleeing commercial extensions

Market Threats

  • Stay's superior script discovery and community features
  • Tampermonkey's dominant brand recognition and API support
  • Potential Safari API changes affecting background script execution

What are the next best moves?

high

Resolve script persistence and background execution bugs.

This is the #1 complaint theme ('scripts automatically turn off') and a primary driver of negative sentiment and potential churn.

medium

Redesign the onboarding and setup flow.

Users report being 'stuck on the informational screen,' indicating a UX barrier that prevents successful first-time use.

medium

Implement a basic script discovery or 'Import from URL' gallery.

This addresses a major feature gap compared to the nemesis, Stay, which features an integrated 'Stay Fork' community for script sharing.

Feature Gaps vs Competitors

  • Integrated script search and discovery (available in Stay)
  • Advanced visual editor with mobile optimization (available in Stay and Web Inspector)
  • Wider range of Greasemonkey/Tampermonkey API support (available in Stay and Tampermonkey)

Key Takeaways

Userscripts is the gold standard for privacy-conscious developers, but it is currently losing the 'ease-of-use' battle to Stay. While its open-source nature is a massive strength, the PM must prioritize fixing script persistence bugs and reducing onboarding friction to prevent power users from migrating to more reliable commercial alternatives.

Where Is It Heading?

Stable

v1.8.6 (Jan 2026) added memory optimization and iOS stability — active maintenance on core performance.

Rankings show a slight decline (↓1) in the Developer Tools category, suggesting increased competition.

User sentiment remains 'Positive' despite persistent technical complaints regarding script loading.

Disclosure

Independent intel to help builders create better apps.

AI-powered analysis with editorial review, built from publicly available sources. See methodology.

Marlvel.ai is not affiliated with, endorsed by, or sponsored by Userscripts, its developer, the app publisher, Apple, or Google Play. All trademarks, logos, and screenshots referenced remain the property of their respective owners.

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Cite this report

Marlvel.ai. “Userscripts Intelligence Report.” Updated May 26, 2026. https://marlvel.ai/intel-report/developer-tools/com-userscripts-macos

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