Userscripts is an open-source Safari extension that allows users to save and execute custom JavaScript and CSS code on websites.
Product velocity
Dormant
Daily rank 🇺🇸
#27
▲1Developer Tools · free
Sentiment
4.4
173 reviews
Nemesis
Stay - Userscript Manager
The App DNA
What makes this app unique?
It removes the dependency on proprietary, ad-supported script managers by providing a transparent, privacy-focused tool for web behavior modification.
For Power users and web developers who want to customize browser behavior and site styling on Safari.
What does it look like?
Key features
Executes arbitrary JavaScript and CSS code on visited websites via Safari extension.
Automates script updates using @version, @updateURL, and @downloadURL tags.
Synchronizes script files between macOS and iOS via iCloud folder selection.
How much does it cost?
The app is distributed as a free, open-source tool with no monetization or subscription tiers.
Velocity
Dormant developmentperformanceShow more...
Development has stalled, with no new feature builds or updates released in over six months. The latest release focused exclusively on performance and stability, specifically addressing memory usage and crash issues. Given the 199-day gap since the last update, the app currently shows no signs of active maintenance or ongoing development.
Who built it?
User Sentiment
What do users think recently?
Fresh user feedback skews excited. Users appreciate open source nature and lack of hidden monetization build significant trust with power users and safari extension capability allows users to inject custom scripts and modify web page behavior.
How are ratings & reviews evolving?
What users say, by theme
- Open source nature and lack of hidden monetization build significant trust with power users
- Safari extension capability allows users to inject custom scripts and modify web page behavior
- Minimalist design and clean interface provide a superior experience compared to legacy script managers
- Scripts stop functioning or fail to load automatically, requiring frequent manual app re-opening
49 of 49 recent reviews analyzed · high confidence · Excited overall
Read the full review analysisUnlock 2 more frustration themes and 2 user requests, each backed by review evidence.
Access the full report for freeCompetition
Competitive landscape for Userscripts
How's the Developer Tools market?
Userscripts maintains a 4.39 rating across 49 reviews, positioning it as a niche utility for Safari power users. Its lack of monetization differentiates it from legacy script managers, though the 199-day update gap limits its ability to address performance regressions.
Read the market outlookThe rivals identified
By Maple Labs Co., Ltd
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.
- Integrated script search and discovery within the app
- More advanced visual editor with better mobile optimization
- Support for a wider range of Greasemonkey/Tampermonkey APIs
TampermonkeyContenderHHyperwebContenderUnlock the head-to-head verdict: where this rival wins, and where it loses.
Access the full report for freeThe Analyst's Read
Key takeaways for Userscripts
Where is it heading?
The market for Safari-based script management is consolidating around privacy-focused, open-source tools. Userscripts remains advantaged by its trust-based positioning, but the 6-month release gap leaves it vulnerable to performance regressions that could drive users to more actively maintained alternatives.
- Persistent script-loading failures force manual app re-opening, which erodes the utility of the automation users expect.
- Users report: The open-source, non-predatory model continues to drive high trust and positive sentiment among the core power-user base.
The SWOT
- Transparent development model builds high trust with power users
- Minimalist interface avoids the clutter of legacy script managers
- Implement a one-click script creation shortcut from the Safari extension
Next best moves
Rebuild background script-loading logic because it is the top-cited reliability complaint → improve retention
The counter-intuitive read
The lack of monetization is not just a…
Read the full takeSince the last report: Development activity has stalled, moving the app into a zombie state with no updates in 199 days. This inactivity has deepened user frustration regarding script persistence and memory performance.
Bottom line
Addressing the background script-loading reliability is the critical path to retention, as the current manual re-enabling requirement creates high friction for power users.
Unlock 2 critical frictions, 1 market threat and the analyst’s take.
Access the full report for freeFAQ
Is Userscripts safe to use for my custom scripts?
Does Userscripts work on both macOS and iOS?
Why do my scripts stop working after a few days?
Sources
- [1] App Store, source
Report last updated