Litmus

WHAT'S NEW (for version 1.0) Litmus is here. Score academic preprints across six quality dimensions. Browse arXiv, bioRxiv, medRxiv, and 5 more sources in one feed. Integrity detection flags tortured phrases, phantom references, and retracted citations. All processing on-device. Free to start, Pro when you need it. Litmus scores academic preprints so you can focus on research that matters. Every paper is evaluated across six quality dimensions — methodology, transparency, reproducibility, author credibility, writing quality, and integrity flags — giving you a single Litmus Score (0-100) before you invest time reading. No AI detection guesswork. Only verifiable signals. HOW IT WORKS Browse preprints from 8 sources in one feed: arXiv, bioRxiv, medRxiv, ChemRxiv, SSRN, EarthArXiv, Research Square, and OSF Preprints. Select your research fields and Litmus delivers relevant papers scored and ready to evaluate. SIX SCORING DIMENSIONS Methodology — Study design signals, controls, sample size mentions, statistical methods. Transparency — Data availability statements, code sharing, pre-registration, conflict disclosures. Reproducibility — Protocol detail, replication potential, materials and methods clarity. Author Credibility — Publication history, h-index, and retraction checks via Semantic Scholar. Writing Quality — Readability, structure, clarity, and academic writing conventions. Integrity Flags — Tortured phrases, phantom references, retracted citations, and paper mill patterns. INTEGRITY DETECTION Litmus flags papers with potential integrity issues using verifiable signals: - 290+ known tortured phrases (synonym-substituted terms common in paper mills) - Phantom reference detection (DOIs that don't resolve in Crossref) - Retracted citation alerts - Suspicious patterns in author metadata All detection uses local dictionaries and public APIs. No probabilistic "AI-generated" claims. FREE TO USE - All 8 preprint sources - 5 Litmus Scores per day - Full integrity alerts on every scored paper - Save up to 25 papers - APA citation copy LITMUS PRO (one-time purchase) - Unlimited Litmus Scores - Unlimited library - AI Summaries — structured summaries via Apple Intelligence, entirely on-device - Author Credibility Profiles - Citation Export — BibTeX, RIS, MLA, Chicago (import into Zotero, Mendeley, EndNote) - Offline Reading — download papers for flights, trains, conferences - Field Notifications — alerts when high-scoring papers arrive in your fields - Text-to-Speech — listen to abstracts with LaTeX stripped PRIVATE BY DESIGN All scoring runs on your device. Your reading history never leaves your phone. No account required. No tracking. No cloud AI. One-time purchase — no subscription. Built for researchers, by someone who reads papers. PRIVACY Privacy Policy: https://kirwana.github.io/litmus-site/privacy.html Support: https://kirwana.github.io/litmus-site/support EULA: Apple Standard License Agreement (EULA) Data Collection: None Data Linked to You: None Data Used to Track You: None Third-Party APIs (not linked to user): Semantic Scholar (author h-index lookup), Crossref (DOI verification)