Kero

Free plan iPhoneWeb

What Kero is

Kero is an AI study workspace for working with course material, exam practice, and writing review. It accepts PDFs, Word files, PowerPoints, YouTube videos, websites, links, documents, videos, and pasted text as study sources. Summaries and note chat let users ask questions about uploaded material and continue with follow-up questions tied to that material. Practice tools generate flashcards, multiple-choice quizzes with explanations, fill-in-the-blank prompts, and open-ended exam exercises. Explain gives a step-by-step answer from a pasted question or uploaded image. AI Check reviews pasted text or documents with an overall human-writing percentage, sentence-level scores, and readability context; Kero says this should be treated as one signal rather than a final verdict. Kero runs on the web and iOS, with a free plan. Unlimited usage remains subject to reasonable fair-use limits.

Who it suits

Kero suits students who want one workspace for importing varied study material, asking source-based questions, practicing, and reviewing writing. It is available on web and iOS and includes a free plan.

What it does well

Imports PDFs, Word files, PowerPoints, videos, websites, and text
Generates flashcards and quizzes with explanations
Supports source-grounded note chat and follow-up questions
Explain answers pasted questions or uploaded images step by step
Includes a free plan on web and iOS

What to know first

AI Check is not a final verdict
Unlimited usage remains subject to fair-use limits
Yearly Pro offer costs $79.99 a year

Plans

Plan	Billed and limits	Price
Free	Start studying for free; plan limits not stated	Free
Kero Pro Yearly Offer	Yearly Offer · In-app purchase; feature limits not stated	$79.99 a year
Kero Pro Weekly	Weekly · In-app purchase; feature limits not stated	$9.99 a month
Kero Pro Yearly	Yearly · In-app purchase; feature limits not stated	$99.99 a year

As kero.study lists them, read 11 Oct 2026. The maker's own page has the final word.

Verdict

Kero combines source-based study help, practice generation, explanations, and writing analysis in one web and iOS workspace. Its free plan provides an entry point, while paid Pro pricing and fair-use limits should be checked before relying on intensive use.

Facts from Kero's own pages

AI Check: AI Check analyzes pasted text or documents with an overall human-writing percentage, sentence-level scores, and readability context. · kero.study, 11 Oct 2026
AI Check limitation: Kero says AI Check results should be treated as one signal rather than a final verdict. · kero.study, 11 Oct 2026
Data rights: Studio Ray says users retain ownership of uploaded content and grant it a license to use and process that content to provide and improve the service. · studioray.co, 11 Oct 2026
Explain: Explain accepts a pasted question or uploaded image and provides a step-by-step answer. · kero.study, 11 Oct 2026
Fair use: Kero's terms say usage described as unlimited remains subject to reasonable fair-use limits and may be temporarily limited for unusually intensive or disruptive use. · studioray.co, 11 Oct 2026
AI flashcards: Yes · kero.study, 24 Sept 2026
Free plan: Yes · kero.study, 24 Sept 2026
Integrations: Studio Ray's terms say the app may integrate with PostHog for analytics, RevenueCat for payment processing, and AI service providers for content processing. · studioray.co, 11 Oct 2026
Mobile app coverage: ios · kero.study, 24 Sept 2026
Note chat: Users can ask questions about uploaded documents, videos, websites, or pasted text and ask follow-up questions grounded in that material. · kero.study, 11 Oct 2026
Platforms: Kero describes study tools for desktop web and review of notes and sessions on a phone; its App Store listing identifies the app as for iPhone. · kero.study, 11 Oct 2026
Practice: Practice modes include generated flashcards, multiple-choice quizzes with explanations, fill-in-the-blank prompts, and open-ended exam practice. · kero.study, 11 Oct 2026
Product: Kero is an all-in-one AI study workspace for understanding study material, practicing for exams, and checking writing. · kero.study, 11 Oct 2026
AI quizzes: Yes · kero.study, 24 Sept 2026
Source inputs: Kero accepts documents, videos, links, and text as sources for summaries, note chat, and practice tools. · kero.study, 11 Oct 2026
Source uploads: Yes · kero.study, 24 Sept 2026
AI summaries: Yes · kero.study, 24 Sept 2026
Support: Studio Ray lists [email protected] for questions about its terms. · studioray.co, 11 Oct 2026
Supported study sources: Release notes list PDFs, Word files, PowerPoints, YouTube videos, websites, and pasted text as importable material. · kero.study, 11 Oct 2026

Where Kero stands on Freedom251

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