Pluto.AI
Answers general-knowledge questions and serves up biographies and book summaries on iOS.
At a glance
Starts at
Free
No paid plan found on the App Store, September 2026.
Free tier
Yes
Platforms
iOS
Best for
Self-learners wanting quick answers across topics
Not for
Anyone needing it on Android or desktop
3.9 out of 5
Scored by a Toolio reviewer after real useOur verdict
Pluto.AI positions itself as an AI teacher for general knowledge, covering history, politics, science, and literature, with detailed biographies and book summaries built in. It's aimed at self-learners and scholars who want a broad reference assistant rather than a subject-specific tutor. It's iOS-only, so anyone on Android or a desktop-first workflow won't be able to use it at all.
✓What it does well
Broad topic coverageIt answers questions across history, politics, science, and literature.
Biographies and summariesIt provides detailed biographies and book summaries on demand.
Simple, guided interfaceThe app is built around a straightforward question-and-answer flow for easy use.
✕Where it falls short
iOS onlyIt's only available on iOS, with no Android or web version.
General knowledge, not expert depthIt's built for broad topics, not deep, specialist-level subject matter.
Accuracy needs checkingAnswers on history or science topics still need a manual check against a trusted reference.
Key features
General knowledge Q&AIt answers questions across science, history, politics, and literature.
Biography lookupIt provides detailed biographies of historical and notable figures.
Book summariesIt generates summaries of books on request.
Concept explanationsIt breaks down new concepts to help with learning.