PDF Conversion vs Duck Calculator
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
PDF Conversion
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PDF Conversion: One-stop PDF Conversion Artifact In the era of digital office and learning, the conversion of file format often becomes a problem that puzzles us. But now, with this powerful PDF conversion app, everything will become easy and convenient! It supports a wide variety of conversion capabilities to meet your needs in a variety of scenarios: * PDF to Word: allows you to easily edit and modify the text content in PDF, retain the original format and layout, and improve work efficiency. * PDF to Excel: Quickly convert table data in PDF into editable Excel tables to facilitate data processing and analysis. * PDF to PowerPoint: Convert PDF documents into beautiful presentations, saving time for remaking. * PDF to picture: PDF pages can be extracted into high-quality pictures, easy to share and display on different platforms. It also supports reverse conversion: * Word to PDF: Ensure that your Word document is stable in format and not easy to be tampered with when sharing and saving. * Excel to PDF: Make Excel tables present in standardized PDF format, which is more suitable for printing and circulation. * PowerPoint to PDF: Fixes presentations in PDF format for easy saving and sharing. * Picture to PDF: Quickly integrate multiple pictures into a PDF file for easy sorting and archiving. Whether you're a student, an office worker, or a professional, this PDF conversion app is your indispensable tool. It has simple operation, fast conversion speed and high quality, which brings great convenience to your work and study. Come and experience it! Automatic renewal rules] 1. We provide automatic renewal subscription services for 1 week, 1 month and 12 months. 2. Payment: The user confirms the purchase and charges it to the iTunes account after payment. 3. Renewal: Subscriptions that include free trials will automatically renew as paid subscriptions. Fees will be charged to your iTunes account within 24 hours prior to expiration, and the cost of renewal depends on your subscription plan. After the fee deduction is successful, the subscription cycle will be extended by one subscription cycle. 4. Cancel renewal: If you need to cancel the renewal, please manually turn off the automatic renewal function in iTunes / Apple ID setting management no less than 24 hours before the current subscription period expires, and no renewal fee will be charged. User Agreement: http://oss.lizhikeji.com/h5/pdfTool/user.html Privacy Policy: http://oss.lizhikeji.com/h5/pdfTool/privacy.html Subscription Agreement: http://oss.lizhikeji.com/h5/pdfTool/subscribe.html
Duck Calculator
This app appears as a standard calculator but has a hidden "magic" mode. It can display preset text or images when a specific number is calculated, offering creative surprises for pranks or confessions.
- Accurate standard calculations
- Magic mode for custom results
- Display preset text or pictures
- Customizable magic effects
- Secret and low-key design
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There is no magic in this world itself, it is just a trick prepared by people who love you. This love may only need a magic calculator. The Real Fake calculator is a seemingly ordinary calculator, but it hides amazing "magic" features. When entering a specific number, it will instantly display your preset text or picture, bringing unexpected surprises to ordinary calculations. This is not only a tool, but also a trick full of creativity and love. Main functions: β’ Accurate calculation, full functionality: Like ordinary calculators, support daily computing needs. β’ Magic mode: Set a "magic result" and when this number is calculated, the calculator will display your own text or picture. β’ Custom magic effects: Whether it's a romantic confession, a funny picture, or a stunning puzzle, it's easy to set up and surprise. β’ Secret and low-key: Looks like a regular calculator, whether it's a prank or a confession, it will surprise people. Let the Duck calculator bring you to feel the miraculous warmth and fun!
Screenshots
Verdict
The clearest difference is price: PDF Conversion at Free against Duck Calculator's $0.99. PDF Conversion also leads on update cadence (every 3 weeks vs every 7 months). Duck Calculator's advantage is in-app purchases (none vs 4). On ads, device support and iOS requirement there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
PDF Conversion is free to download; Duck Calculator costs $0.99 up front. PDF Conversion sells 4 in-app purchases, starting at $2.99 per 7 days. Duck Calculator asks for nothing beyond the download.
PDF Conversion ships an update every 3 weeks, Duck Calculator every 7 months. Both last shipped on November 4, 2026.
| Parameter | PDF Conversion | Duck Calculator |
|---|---|---|
| Price | Free β better | $0.99 |
| Positive reviews | β | 100.0% of reviews |
| Update frequency | Every 3 weeks β better | Every 7 months |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Monetization | β | Paid |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 15.0 β better | 16.0 |
| Further details β not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing Litchi Fun Technology Co., Ltd. | εΎ·ι δ½ |
In-app purchases
PDF Conversion
- Weekly Subscription7 Days trial$2.997 Days
- Monthly Subscription$4.991 Month
- Annual Subscription$14.991 Year
- Lifetime Member$24.99
Duck Calculator
No in-app purchases
Questions
Is PDF Conversion free?
Is Duck Calculator free?
Do PDF Conversion or Duck Calculator have ads?
Which is updated more often, PDF Conversion or Duck Calculator?
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