Litmaps alternatives · AI Research
Litmaps alternatives with an iPhone and iPad app
The Litmaps listing does not include an iPhone and iPad app. 15 of the 69 other AI research tools in this directory list an iPhone and iPad app.
Litmaps has a free plan. Paid plans start at $10 per month, billed annually, with an academic email ($40 commercial). 10 of them are free or have a free plan.
15 tools · Listings checked up to Nov 13, 2026 · Where the facts come from
The 12 closest to Litmaps
- Free trial · from $95/yr
ReadCube Papers
Reference library with an AI assistant for cited answers
- ReadCube Papers starts at $95 per user / year, billed annually ($10 billed monthly). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Litmaps has a free plan. ReadCube Papers does not, though it has a free trial.
- Only ReadCube Papers lists iOS and Android apps.
- Only ReadCube Papers lists a browser extension.
- Free plan · from $12/mo
SciSpace
AI research platform for literature review and reading papers
- SciSpace starts at $12 per month, billed annually ($20 billed monthly). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only SciSpace lists an iOS app.
- Only SciSpace lists a browser extension.
- SciSpace also covers chat assistant, AI search and AI agents.
- Free plan · from $89.99/yr
ChatPDF
Ask questions about PDFs and get answers with citations
- ChatPDF starts at $89.99 per year or $14.99 per month (US App Store in-app purchase). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only ChatPDF lists macOS, Windows, iOS and Android apps.
- ChatPDF also covers chat assistant and AI search.
- Free plan · from $8/mo
Anara
AI research assistant that cites the exact source passage
- Anara starts at $8 per seat / month, billed yearly ($10 billed monthly). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only Anara lists macOS and iOS apps.
- Only Anara lists a browser extension.
- Anara also covers chat assistant, AI search, web clipper and AI agents.
- Free plan · from $11.99/mo
AskYourPDF
Chat with PDFs and other documents and get cited answers
- AskYourPDF starts at $11.99 per month, billed yearly ($14.99 billed monthly). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only AskYourPDF lists iOS and Android apps.
- Only AskYourPDF lists a browser extension.
- AskYourPDF also covers chat assistant.
- Free plan · from $69/yr
R Discovery
Paper discovery app with an AI assistant, PDF chat and audio
- R Discovery starts at $69 per year, or $12 billed monthly (US prices). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only R Discovery lists iOS and Android apps.
- Only R Discovery lists a browser extension.
- R Discovery also covers chat assistant and AI search.
- Free plan · from $14.99/mo
Liner
AI search with cited answers, research agents and a writer
- Liner starts at $14.99 per month, billed annually ($17.99 billed monthly). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only Liner lists macOS, Windows, iOS and Android apps.
- Only Liner lists a browser extension.
- Liner also covers AI search, AI agents, long-form writing and highlights.
- Free plan · from $7/mo
Otio
AI research workspace for chatting across many sources
- Otio starts at $7 per month (Lite), billed monthly or $84 per year. Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only Otio lists macOS, Windows, Linux and iOS apps.
- Only Otio lists a browser extension.
- Otio also covers chat assistant, AI search, notes and AI agents.
- Free plan · from $20/yr
Zotero
Free, open-source reference manager from a nonprofit
- Zotero starts at $20 per year for 2 GB of file storage. Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only Zotero lists macOS, Windows, Linux, iOS and Android apps.
- Only Litmaps lists a web app.
- Zotero is open source, according to its own site.
- Free trial
Eightify
AI summaries and key insights for YouTube videos
- Litmaps has a free plan. Eightify does not, though it has a free trial.
- Only Eightify lists iOS and Android apps.
- Only Eightify lists a browser extension.
- Only Litmaps lists a web app.
- Free trial · from $8.30/mo
Paperpile
Reference manager built around Google Drive, Docs and Word
- Paperpile starts at $8.30 per month, billed annually. Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Litmaps has a free plan. Paperpile does not, though it has a free trial.
- Only Paperpile lists iOS and Android apps.
- Only Paperpile lists a browser extension.
- Free plan · from $8/mo
alphaXiv
arXiv reading and discovery site with an AI research assistant
- alphaXiv starts at $8 per month (alphaXiv Go). Litmaps starts at $10 per month, billed annually, with an academic email ($40 commercial).
- Only alphaXiv lists an iOS app.
- Only alphaXiv lists a browser extension.
- alphaXiv also covers chat assistant, AI search and highlights.
Common questions
Which Litmaps alternatives have an iPhone and iPad app?
ReadCube Papers, SciSpace, ChatPDF, Anara, AskYourPDF, R Discovery, Liner, Otio and 7 more list an iPhone and iPad app.
Does Litmaps have an iPhone and iPad app?
The Litmaps listing does not include an iPhone and iPad app. It lists Web.
Which of these AI research tools are free?
SciSpace, ChatPDF, Anara, AskYourPDF, R Discovery, Liner, Otio, Zotero and 2 more are free or have a free plan.
When was this checked?
Each listing shows its own date. On this page they run from Oct 5, 2026 to Nov 13, 2026. Vendors change prices and plans without notice, so confirm on their site before you buy.
This page is built from the listings. A tool is here because its listing says so, and the order is how close each is to Litmaps: the alternatives its listing names first, then the tools that share the most features with it.