Comparison

QuickNotes Recall vs PDF2Audio

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

Head to head
About

QuickNotes Recall

Features
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QuickNotes Recall turns anything worth knowing into something you'll never forget, using the same memory science that top students, language learners, and memory champions rely on every day. Whether you're learning names at work, studying for an exam, picking up a new language, or just trying to remember the things that matter, QuickNotes Recall makes it effortless to do it right. HOW IT WORKS The app is built around two scientifically proven learning methods: Spaced Repetition: After every review, QuickNotes Recall calculates the perfect next review date automatically. Cards you know well come back weeks later. Cards you're still learning come back sooner. Over time, your sessions shrink while your retention grows. The Interleaving Method: Instead of drilling one topic at a time, review sessions mix your categories automatically. Research consistently shows that interleaved practice produces dramatically better long-term retention than blocked study. THE ANCHOR: YOUR SECRET WEAPON Every card has an Anchor field, a place for a vivid image, a funny story, or a personal mnemonic. Built-in coaching with category-specific examples helps you craft anchors that actually work. Most apps skip this. It's the single biggest factor in whether something sticks. FEATURES Spaced Repetition Engine: Rate each card as Remembered, Unsure, or Forgot and the schedule adjusts automatically. Interleaved Review Sessions: All categories mixed together for maximum retention. Anchor Coaching: Tap the lightbulb for guided examples tailored to your category. Bulk Import: Paste a list, open a CSV, or share text from another app. Contact Import: Bring in names straight from a vCard (.vcf) or a Google Contacts CSV export. Duplicate Detection: Bulk imports flag likely duplicates before you commit them. Undo Last Rating: Truly reverses your last rating, schedule and all. Smart Queue Management: Updated engine fallbacks guarantee a smooth, reliable review queue whether you have a minimal library or are studying thousands of cards. Session Limits: Set a daily card cap so your queue never feels overwhelming. Daily Goals & Lifetime Streaks: Set a review target and watch your lifetime streak build to celebrate your long-term consistency. Gentle Reminders: An optional daily notification that only nudges you when cards are actually due. Tags & Categories: Fully customizable with your own field labels, tags, and search. JSON & CSV Backup: Export your full library any time, plus automatic daily on-device snapshots. Restore on a new device instantly. Practice Mode: Drill any category without affecting your review schedule. Customizable Appearance: Light, dark, or system theme with custom accent colors. YOUR PRIVACY, GUARANTEED QuickNotes Recall collects absolutely nothing. No account. No sign-up. No analytics. No ads. Everything stays on your device. It never touches a server. WHAT YOU CAN LEARN People & Names Ā· Languages & Vocabulary Ā· History & Dates Ā· Science & Formulas Ā· Study & Exam Prep Ā· Professional Knowledge Ā· Arts & Culture Ā· Anything with a custom category Free. No subscriptions. No in-app purchases. No catch. The primary adjustments were made in the features list to integrate the 1.0.2 updates. "Daily Goals & Streaks" now highlights the new lifetime tracking, and a new "Smart Queue Management" bullet was added to showcase the improved fallbacks for both minimal and extreme use cases without getting overly technical.

About

PDF2Audio

Features
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Turn any PDF — or web article — into audio you'll actually listen to. PDF2Audio reads your PDFs aloud with natural AI voices — word for word, or as a lecture or a two-host podcast. Books get their own chapters, so a whole book plays like an audiobook. Paste a link, or share a page from Safari, and listen to the article instead of reading it. WHY PEOPLE USE IT • Read aloud: every word of your PDF, narrated clearly. • Book mode: whole books, with chapters you can jump between. • Lecture and podcast styles that explain the material. • Web articles: paste a link or share from Safari — the article, not the menus and ads around it. • Starts playing in about a minute — listen while the rest is made. • Mini player: audio keeps playing while you move around the app. • Continue listening: pick up where you stopped, right from the Library. • Quiz, key terms and section summaries to help you study. • Read along with the full transcript. • Sleep timer, adjustable speed, and your place saved — on iPhone and on the web. • Page range: convert just the pages you need. • Scanned PDFs work too — text recognition runs on your device. • 13 voices, 18 languages. • Library, playlists and downloads for offline listening. FREE TO START Your first 50,000 characters are free. When you need more, subscribe for a monthly allowance or buy credits once — they never expire. Subscriptions renew automatically until cancelled in iOS Settings. PRIVACY Your PDFs and links are used only to create your audio and are never sold or used for ads. No ads, no tracking. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.pdf2audio.ai/privacy

Screenshots

QuickNotes Recall3 screens
PDF2Audio4 screens

Verdict

The call

The clearest difference is in-app purchases: QuickNotes Recall at none against PDF2Audio's 7. QuickNotes Recall 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 Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. PDF2Audio sells 7 in-app purchases, starting at $9.99 per month. QuickNotes Recall asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 25, 2026 and October 31, 2026 respectively.

Scorecard2 real differences Ā· 4 level
QuickNotes Recall versus PDF2Audio: the parameters behind the verdict, then further details
ParameterQuickNotes RecallPDF2Audio
PriceFreeFree
Update frequencyEvery 3 monthsEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size25 MB9 MB
Age rating4++4
DeveloperRyan BairShaozhuang Chen

In-app purchases

None

QuickNotes Recall

No in-app purchases

7 purchases

PDF2Audio

Subscriptions4
  • Basic Plan$9.991 Month
  • Pro Users$59.991 Month
  • Basic Plan$79.991 Year
Show 1 more
  • Pro Users$499.991 Year
One-time3
  • 100,000 characters$4.99
  • 300,000 characters$12.99
  • 1,000,000 characters$34.99

Questions

Is QuickNotes Recall free?
QuickNotes Recall is free to download, with no in-app purchases.
Is PDF2Audio free?
PDF2Audio is free to download, with in-app purchases available.
Do QuickNotes Recall or PDF2Audio have ads?
Neither QuickNotes Recall nor PDF2Audio shows ads.
Which is updated more often, QuickNotes Recall or PDF2Audio?
QuickNotes Recall ships an update every 3 months, and PDF2Audio every 3 months. Most recently, QuickNotes Recall was updated on October 25, 2026 and PDF2Audio on October 31, 2026.

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