Comparison

Scrible Extension vs SA_agent

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Scrible Extension

This browser extension allows users to save, highlight, and comment on web pages, PDFs, and articles. It integrates with a cloud-based research platform to organize and search saved content, offering features like automatic citation capture and bibliography creation for educational users.

Highlights
  • Save webpages, PDFs, and articles instantly
  • Highlight key passages
  • Add comments and thoughts
  • Tag articles for organization
  • Automatic annotation loading on revisited pages
  • Full-text search of saved library
  • Automatic citation capture (Edu Plan)
Features
Read full description

SCRIBLE ACCOUNT This Scrible Extension App accompanies and must be used with a Scrible account. Sign up for a free Scrible account at https://www.scrible.com SCRIBLE OVERVIEW • Scrible is the most advanced research and writing platform ever built. • Historically, you had to manage multiple tools through the research and writing workflow. Scrible consolidates these tools, streamlining and centralizing the process of curating, annotating, citing and writing all in one place. • Scrible integrates with Google Docs and Microsoft Word to support writing. • Scrible is great for anyone curating, reading and researching online. • Scrible is particularly useful for students, educators and researchers. THIS EXTENSION APP • This Scrible Extension App adds the Scrible Extension to the Safari Web browser. • While reading or researching online, click the extension button in Safari to launch Scrible and load the Scrible Toolbar and Sidebar on the article. That lets you: • Save webpages, PDFs and database articles instantly • Highlight key facts and passages while reading • Add comments to capture your thoughts • Tag articles to organize your research • If you later revisit a webpage you previously annotated, the Scrible Extension will automatically load your annotations on it. This feature can be disabled/enabled. SCRIBLE LIBRARY • Your articles are saved in My Library in your Scrible account, where you can: • Browse, sort, filter and full-text search them • Organize them using categorical tags • You can also curate information into My Library by: • Opening a PDF from your desktop or Google Drive • Uploading PDFs and other docs from your desktop • Adding bookmarks and importing them from your browser SCRIBLE FOR EDUCATION In our free Edu Plan, K12 students and educators can also: • Capture citations automagically • Create bibliographies with 1 click • Use read aloud, dictionary and translation features for text assistance and comprehension • Use Class Libraries to quickly and easily share a set of texts • Do more with Scrible Writer, Scrible’s word processor add-on for Google Docs and add-in for Microsoft Word. Learn more here: https://scrible.com/writing-tools Scrible supports teaching and learning across content areas (e.g., ELA, social studies, science, foreign language), programs (e.g., AP, IB), support areas (e.g., SPED, ELL), project types (e.g., science fair, National History Day) and initiatives (e.g., personalized learning, project-based learning, writing across the curriculum). Learn more at https://www.scrible.com/edu HELP Have questions? Email us at help@scrible.com or visit us at https://www.scrible.com/help — Team Scrible

About

SA_agent

Features
Read full description

SA_agent is a Safari Web Extension for researchers who use Google Scholar on iPhone and iPad. It adds local journal context to supported result pages. A 7-day free trial, then $4.99 per year, unlocks the extension. Summaries use Apple Intelligence on your device. RESEARCH WITH LOCAL JOURNAL CONTEXT • See color-coded SJR quartiles and available JCR, CAS, CiteScore, indexing, and discipline-list fields beside supported Scholar results. • Match journals on device with an ISSN hit, a result cache, a Bloom filter, a sorted prefix index, a token index, and a trigram index that checks plausible titles with a banded edit-distance test. • Search more than 35,000 bundled journals by title or ISSN without contacting a journal-ranking service. • Choose, reorder, and hide ranking badges to match your workflow. • Import a private custom journal list from CSV or JSON and display its ranks alongside bundled data. Custom datasets stay in extension-local storage. OPTIONAL AI RESEARCH TOOLS • Create focused paper summaries from Scholar results. • Choose a 30–1,000-word target and Academic, Formal, or Casual tone. • Regenerate or improve a summary, then copy it or download it as text. • Connect an optional Zotero Web API account, format up to 50 library items in APA, Chicago, MLA, or Harvard style, and generate a downloadable literature-review draft. • Summaries and literature reviews are created with Apple Intelligence on your device. SUBSCRIPTION Start a 7-day free trial in the SA_agent app, then subscribe for $4.99 per year. Apple confirms the price before the trial begins. Cancel during the trial and you will not be charged. An active trial or subscription unlocks Scholar rankings, Journal Search, custom datasets, summaries, and Zotero literature reviews. You do not paste an extension token. Earlier credit packs do not unlock the subscription. PRIVACY BY ACTION Journal matching, ranking lookup, and custom datasets are processed locally. Summaries and literature reviews use Apple Intelligence on your device and are not sent to an SA Agent server. Optional Zotero credentials are used for Zotero API requests. SA_agent does not sell personal information, collect general browsing history, or run advertising analytics. See the Privacy Policy for complete details. GET STARTED 1. Open SA_agent and start the 7-day free trial. After the trial, the subscription is $4.99 per year. 2. Enable the SA_agent extension in Safari and allow access to supported Google Scholar pages. 3. Open the extension Options page to choose badges, search journals, add a custom dataset, or connect Zotero. Availability of optional ranking fields depends on the licensed data included in the installed release. SA_agent is intended for academic research workflows. Google Scholar and Zotero are trademarks of their respective owners. SA_agent is not affiliated with or endorsed by Google Scholar or Zotero. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://swiphtgroup.com/sa-agent/privacy/

Screenshots

Scrible Extension3 screens
SA_agent4 screens

Verdict

The call

The clearest difference is in-app purchases: Scrible Extension at none against SA_agent's 4. SA_agent's advantage is update cadence (every 3 weeks vs every 17 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SA_agent sells 4 in-app purchases, starting at $4.99 per year. Scrible Extension asks for nothing beyond the download.

UpkeepUpdate frequency

Scrible Extension ships an update every 17 months, SA_agent every 3 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 7 level
Scrible Extension versus SA_agent: the parameters behind the verdict, then further details
ParameterScrible ExtensionSA_agent
PriceFreeFree
Rating5.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 17 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPod, MaciPhone, iPad, iPod, Mac, Vision Pro — better
Requires iOS15.015.0
Further details — not scored
Size2 MB6 MB
Age rating4+4+
DeveloperScrible, Inc.鹏帆 常

In-app purchases

None

Scrible Extension

No in-app purchases

4 purchases

SA_agent

Subscriptions1
  • SA_agent Annual7 Days trial$4.991 Year
One-time3
  • SA Agent Credits$0.99
  • SA Agent Credits$4.99
  • SA Agent Credits$19.99

Questions

Is Scrible Extension free?
Scrible Extension is free to download, with no in-app purchases.
Is SA_agent free?
SA_agent is free to download, with in-app purchases available.
Do Scrible Extension or SA_agent have ads?
Neither Scrible Extension nor SA_agent shows ads.
Which is updated more often, Scrible Extension or SA_agent?
Scrible Extension ships an update every 17 months, and SA_agent every 3 weeks. Most recently, Scrible Extension was updated on November 3, 2026 and SA_agent on October 31, 2026.

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