OCR vs ConvertCalc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
OCR
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Designed especially for books and magazines, the app uses powerful OCR to capture every line clearly, even from complex layouts, so you can work with your content instead of retyping it. Start by choosing the type of document you are scanning, such as a book or magazine page. Then simply point your camera, capture the page, and let the app extract the text for you. The scanner is optimized to handle multi-column pages, footnotes, and varied fonts, making it ideal for students, researchers, editors, and anyone who works with printed material. After each scan, you see the extracted text along with helpful details that highlight what was captured. You can review and edit the text directly, copy it into your notes, or share it with other apps. If you enable extraction details, you get a clear breakdown of the recognized content, which is especially useful for checking accuracy on academic or professional material. The app also includes smart guidance on how to format and use the extracted text. Formatting tips help you turn raw OCR output into clean notes, citations, or study guides. For quick review, enable the summary option to generate a concise overview of the scanned passage. This is perfect for revising key sections of a book, preparing for exams, or gathering background information for research projects. All your scans are saved in an organized history so you can easily revisit previous pages, search within your saved documents, and continue building your personal library of excerpts. Each saved scan shows the original prompt or description alongside the extracted text, making it simple to remember why you captured it in the first place. Whether you are studying, researching, or simply collecting interesting passages from your reading, this app turns your phone into a reliable text capture and analysis tool. Scan once, extract instantly, and keep your most important book and magazine content always within reach. Terms Of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ConvertCalc
This app combines a powerful calculator with an advanced unit converter, offering over 200 units across 19 categories. It allows for unified calculations and conversions in one step, with features like live currency exchange and date conversions. An optional pro version unlocks advanced customization and organizational tools.
- Unified calculation and conversion workflow
- Over 200 units across 19 categories
- Live currency conversion
- Multiple calendar system conversions
- Age calculator
- Customizable themes and layouts
- Offline functionality (excluding live currency)
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ConvertCalc – Pro Calculator & Unit Converter Fast. Private. Ad-free. Over 200+ units. The only calculator you’ll ever need. ConvertCalc combines a powerful everyday calculator with an advanced unit converter in one clean, distraction-free app. Built for students, travelers, freelancers, and professionals who need accurate results instantly — without ads or clutter. WHY CONVERTCALC? Unified Workflow Calculate and convert in one step. Enter an equation, get the result, and instantly convert it to any unit. No switching apps. No extra taps. POWERFUL UNIT CONVERSION 19 categories. Hundreds of units. Real-world use cases: Essentials Length, Mass, Volume, Area, Temperature, Time, Speed Travel & Finance Live currency conversion (30+ major currencies) Shoe size conversion (Men, Women, Kids) Science & Engineering Force, Energy, Power, Pressure, Torque, Fuel Consumption Technology Data storage (Bit to Yottabyte) Data transfer speeds Calendar Systems Convert dates across: Gregorian, Japanese, Buddhist, Islamic, Hebrew, Chinese Lunar, Indian, Persian, ISO 8601, ROC Age Finder Instant age calculator and estimator GO PRO – TOTAL CONTROL Unlock the full power of ConvertCalc Pro: Favorite Pairs Save common conversions for quick access (USD to EUR, Meters to Feet, Celsius to Fahrenheit) One-Handed Layouts Compact, Right-handed and Left-handed modes Unlimited Named History Save, label, and organize your calculations Saved Shoe Profiles Store sizes for family and friends Full Organization Reorder currencies and units your way Advanced Rounding Control decimals and precision Premium Customization 50+ themes and custom colors Design your perfect calculator 100% Ad-Free Forever BUILT FOR DAILY USE Works offline (except live currency updates) Smart history tracking No tracking, no ads Clean, modern interface Download ConvertCalc One app. Endless calculations.
Screenshots
Verdict
The clearest difference is ads: OCR at none against ConvertCalc's shown. OCR also leads on iOS requirement (12.4 vs 17.0). ConvertCalc's advantage is update cadence (every 8 days vs every 3 months). On price, in-app purchases 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. OCR sells 2 in-app purchases, starting at $2.99 per 7 days and ConvertCalc sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
OCR ships an update every 3 months, ConvertCalc every 8 days. The most recent releases landed on November 9, 2026 and October 30, 2026 respectively.
| Parameter | OCR | ConvertCalc |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 months | Every 8 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 28 MB |
| Age rating | 4+ | 4+ |
| Developer | Arda Emin Cimen | Michael Riehl |
In-app purchases
OCR
- Weekly pro plan$2.997 Days
- Annual pro plan$14.991 Year
ConvertCalc
- ConvertCalc Pro$8.99









