Skim vs Instash
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Skim
Transform documents into bite-sized learning cards with AI. Choose from four learning modes, ask questions about terms, and track your progress. Ideal for students, researchers, and professionals.
- AI-generated learning cards
- Multiple learning modes (Deep Understanding, ELI5, Memorize, Quick Review)
- Ask AI questions about document terms
- Progress tracking (streak, mastery, accuracy)
- Supports PDF, Word, PowerPoint, text, and Markdown
- No ads or data tracking
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Pick how you want to learn: Deep Understanding, ELI5, Memorize, or Quick Review. Skim's AI breaks the document into bite-sized cards in that mode. Upload any document — PDF, Word, PowerPoint, plain text, or Markdown and get tailored cards. Swipe any term to ask Skim about anything unclear, quiz yourself to see what stuck, and track your progress along the way. Same dopamine, actually useful. HOW IT WORKS 1. Upload a PDF, slide deck, doc, or notes 2. Skim's AI breaks it into bite-sized cards — each focused on a single idea 3. Swipe through. Tap any term to ask Skim for a deeper explanation 4. Quiz yourself to see what actually stuck 5. Track your streak and watch your progress unlock GREAT FOR • Students prepping for exams or working through textbooks • Researchers digesting papers and reports • Professionals navigating contracts, briefs, manuals, and decks • Self-learners working through online courses and books • Anyone who's collected docs they meant to read FOUR WAYS TO LEARN • Deep Understanding — comprehensive, concept-first • ELI5 — plain language and analogies • Memorize — quiz-dense, atomic facts for recall • Quick Review — punchlines only, for the refresh ASK SKIM ANYTHING Tap any term in a card for an instant explanation. Or type a follow-up question — Skim's AI assistant stays grounded in what the document actually says, so every answer ties back to your source. TRACK YOUR PROGRESS • Reading streak counter • Card mastery % per document • Quiz accuracy that finds your weak spots • Weekly activity at a glance SUPPORTED FORMATS PDF, PowerPoint (.pptx), Word (.docx), plain text (.txt), Markdown (.md) AI may make mistakes — Skim's cards are reading aids, not authoritative answers. Verify critical information against your source. PRO ($6.99/month or $69.99/year) • Unlimited document processing • 140 AI assistant questions per month ULTRA ($13.99/month or $139.99/year) • Everything in Pro • 280 AI assistant questions per month Cancel anytime in iOS Settings. PRIVACY FIRST No ads. No tracking. No selling your data. Your documents stay yours. Read our full policy at https://tryskim.app/privacy. Privacy Policy: https://tryskim.app/privacy Terms of Use: https://tryskim.app/terms Support: hello@tryskim.app
Instash
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Stop mindless scrolling. Start learning in minutes. Instash turns your daily scroll into something meaningful. Explore curated “stashes” of short, powerful lessons across psychology, philosophy, finance, productivity, and more. Designed for modern attention spans, each lesson is clear, concise, and built to stick.
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Verdict
The clearest difference is in-app purchases: Instash at none against Skim's 4. Instash also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support 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. Skim sells 4 in-app purchases, starting at $6.99 per month. Instash asks for nothing beyond the download.
Skim ships an update every 2 weeks, Instash every 10 days. The most recent releases landed on June 25, 2026 and September 13, 2026 respectively.
| Parameter | Skim | Instash |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (3 ratings) — better | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 weeks | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Freemium | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 10 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | DORUK SAVASAN | Tanishq Jain |
In-app purchases
Skim
- Pro Monthly$6.991 Month
- Ultra Monthly$13.991 Month
- Pro Annual$69.991 Year
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- Ultra Annual$139.991 Year
Instash
No in-app purchases





