Comparison

Skim vs Peras

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Read full description

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

About

Peras

Features
Read full description

Turn your Goal into a personalized learning path with AI explanations, connected concepts, and visible progress. Start where you are Tell Peras what you want to understand and answer a few questions about your starting point. Your Goal becomes a concept map that shows what to learn next and how ideas connect. Learn one idea at a time Read AI-authored explanations in the Reader. Ask for help when something is unclear and mark familiar ideas as known. Keep your learning connected Save useful explanations, take notes, and pick up where you left off. Explore science, technology, the humanities, languages, business, and more through a Goal that matters to you. Start free Create one Goal map and read an introductory preview of the first Section you choose. Peras Premium is a monthly subscription that lets you continue beyond the preview and keep creating Goal maps and learning content. If you’re eligible, try Premium free for 3 days, then pay the monthly price shown before purchase. Your Apple Account is charged when the trial ends. The subscription renews automatically unless canceled at least 24 hours before the trial or current billing period ends. Manage or cancel it in App Store subscription settings. AI-authored material may be incomplete or inaccurate. Verify important information with authoritative sources. Privacy Policy: https://peras.app/privacy Terms of Use: https://peras.app/terms

Screenshots

Skim4 screens
Peras3 screens

Verdict

The call

Skim and Peras are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Skim sells 4 in-app purchases, starting at $6.99 per month and Peras sells 1 in-app purchase, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

ScorecardNo meaningful differences
Skim versus Peras: the parameters behind the verdict, then further details
ParameterSkimPeras
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 2 weeks—
AdsNoNo
In-app purchasesYesYes
MonetizationFreemium—
DevicesiPhoneiPhone, iPad — better
Requires iOS17.0 — better18.0
Further details — not scored
Size10 MB17 MB
Age rating4+12+
DeveloperDORUK SAVASANEmergent System LLC

In-app purchases

4 purchases

Skim

Subscriptions4
  • Pro Monthly$6.991 Month
  • Ultra Monthly$13.991 Month
  • Pro Annual$69.991 Year
Show 1 more
  • Ultra Annual$139.991 Year
1 purchases

Peras

Subscriptions1
  • Peras Premium3 Days trial$7.991 Month

Questions

Is Skim free?
Skim is free to download, with in-app purchases available.
Is Peras free?
Peras is free to download, with in-app purchases available.
Do Skim or Peras have ads?
Neither Skim nor Peras shows ads.

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