Lexis+® with Protégé™ Mobile vs Justinian
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Lexis+® with Protégé™ Mobile
This app provides legal professionals with AI-powered research tools on mobile devices. It offers features like asking legal questions, summarizing cases, and drafting documents, all synced across devices.
- Ask legal questions with AI
- Summarize legal cases
- Generate document drafts
- Sync conversations across devices
- Secure document sharing
- Track alert results
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Unlock the power of comprehensive legal research on your Apple iPhone® or iPad® with the Lexis+® with Protégé™ mobile app. Seamlessly integrate AI technology with LexisNexis’ trusted legal content to enhance your research on the go. Key Features Ask a Legal Question: Get reliable, insightful answers to complex legal queries with advanced natural language processing. Summarize a Case: Quickly extract key points and insights from legal cases. Generate a Draft: Create well-structured drafts efficiently, saving time and effort. Recent Conversations: Access and review previous interactions with the AI assistant for continuity. Mobile-to-Desktop Sync: Seamlessly sync recent conversations and drafts across devices. Designed for legal professionals, students, and knowledge workers, the Lexis+® with Protégé™ app features a powerful AI assistant that supports your legal research workflows. Continue recent conversations with the assistant to clarify and expand on ideas, enhancing your groundwork. Enhanced Productivity Advanced AI: Leverage natural language processing and detailed query analysis for relevant, insightful responses. Seamless Integration: Sync your offline reading library with Folders on the web. Document Sharing: Securely share documents for seamless collaboration. Client ID Management: Manage Client IDs with ease. Alert Tracking: Track alert results from the web. Subscription Information: An active Lexis+® with Protégé™ subscription with a valid login and password is required to use this application. For full research functionality and access to additional products, visit Lexis+® with Protégé™ on the web. Trademarks: LexisNexis, Lexis+, Shepard’s®, Lexis Answers, and the Knowledge Burst logo are registered trademarks of RELX, Inc., used under license.
Justinian
An AI-powered platform for legal professionals to conduct regulatory research. It offers natural language search, analysis, and document generation against legal texts. Access is provided through organizational agreements.
- AI-powered regulatory research
- Natural language search
- AI-powered analysis
- Professional document generation
- Access to regulations, statutes, and court opinions
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Justinian is the AI-powered regulatory research platform for legal professionals. Built for law firms, government agencies, and corporate legal teams, Justinian provides natural language search, AI-powered analysis, and professional document generation against regulations, statutes, and court opinions. Justinian is enterprise software available exclusively to organizations with an active Vulcan agreement. Account access is provisioned by your organization's administrator. Learn more at vulcan.ai or request a demo at davina@vulcan.ai.
Screenshots
Verdict
The clearest difference is review sentiment: Justinian at 100% against Lexis+® with Protégé™ Mobile's 56%. Justinian also leads on rating (5.0 vs 3.2) and monetization model (free vs subscription). Lexis+® with Protégé™ Mobile's advantage is iOS requirement (15.0 vs 17.0). On price, ratings volume, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Justinian holds the better App Store score, 5.0 against 3.2. Both are backed by a comparable volume of ratings — 12 and 6 respectively. Written reviews point the same way: 56% of Lexis+® with Protégé™ Mobile's written reviews are positive against 100% of Justinian's.
Lexis+® with Protégé™ Mobile ships an update every 11 days, Justinian every 3 days. Both last shipped on October 24, 2026.
| Parameter | Lexis+® with Protégé™ Mobile | Justinian |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (12 ratings) | 5.0 (6 ratings) — better |
| Positive reviews | 55.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 12 — better | 6 |
| Update frequency | Every 11 days | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Subscription | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 87 MB | 310 MB |
| Age rating | 17+ | 4+ |
| Developer | LexisNexis | Vulcan Technologies, Inc. |
Customer experience
Lexis+® with Protégé™ Mobile
Justinian
In-app purchases
Lexis+® with Protégé™ Mobile
No in-app purchases
Justinian
No in-app purchases






