Pudding Scan vs Unit Converter
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Pudding Scan
Transform paper documents into high-quality PDF files with a single tap. This ad-free scanner offers batch text extraction, translation, and automatic correction for various use cases, from students to teachers and personal learning.
- Scan paper documents to PDF
- Batch image text extraction
- Text translation
- Automatic document correction
- Accurate edge trimming
- Multiple filter enhancements
Read full descriptionHide full description
A professional, green and ad-free scanning software that can scan paper documents into pdf electronic files with one click, allowing for sharing and printing anytime and anywhere. Batch image text extraction and translation, accurate and efficient; The specific common scenarios are as follows: -- Common Scenarios -- "Student, Staff The blackboard writing and PPT in class and meetings can be automatically corrected and saved with one click. The operation is convenient and easy to review, organize and understand in the future. "Teacher High-quality exercises in the workbook can be scanned and extracted, and multiple questions can be combined and exported to word to create test papers, reducing the workload. "Personal Learning Enhancement Read books and posts anytime and anywhere, scan and extract the essence of the text, and simply accumulate wisdom. -- Functional Features -- "Take a photo to generate an electronic copy With just one tap, the document can be automatically corrected to generate an ultra-clear electronic version. "Accurate document trimming It can automatically and accurately identify the edges of any text or image content carrier and crop them in one step. "Multiple filters Enhanced With multiple filters such as soft, enhanced, brightened and grayscale, it automatically removes the messy background of the picture and highlights the clear contrast of the text. --Automatic renewal rules-- 1. Subscription service A) Pudding scanning continuous monthly subscription (1 month) B) Pudding Scanning Continuous monthly subscription (1 month) B) Pudding Scanning Continuous annual Package (1 year) 2. Subscription price A) Continuous monthly subscription (1 month), $0.99 for the first month and $3.99 per month thereafter B) Continuous monthly subscription (1 month), $3.99 per month C) Continuous annual package (1 year), $21.99 per month for the first year and $31.99 per month for subsequent years 3 Payment: After the user confirms the purchase and makes the payment, it will be credited to the iTunes account 4. Automatic renewal: Apple iTunes accounts will be charged within 24 hours before expiration. Once the deduction is successful, the subscription period will be extended by one subscription cycle 5. Disable the service: You can go to "Settings" on your iPhone --> Enter "iTunes Store & App Store"--> click" Apple ID", select" View Apple ID", enter the "Account Settings" page, click "Subscribe", manage the automatic subscription service, and if need the consumption will be closed 24 hours before the end of each billing cycle. No further charges will be made within 24 hours before the expiration. 6.Privacy Policy:https://www.budingscan.com/scanner/wk2504014c133101 Terms of Use:https://www.budingscan.com/scanner/wk2504013d5afc59 Auto-Renewal Service Rules:https://www.budingscan.com/scanner/wk250630a6f167b8 Membership Services:https://www.budingscan.com/scanner/wk25063083060016
Unit Converter
This utility app offers conversion for over 100 units across 18 categories, including length, mass, temperature, and digital storage. It supports a wide range of specific units within each category and provides a clean, ad-free interface for quick conversions.
- 18 unit categories
- Over 100 units supported
- Ad-free experience
- Supports multiple devices
- Pro version with free trial
Read full descriptionHide full description
Support 18 categories of units, convert over 100+ units: - Angle: Degrees, Radians, Grad, Arcseconds, Arcminutes, Revolutions - Area: Mm², Square Kilometers, Square Meters, Square Centimeters, Mm², Μm², Nm², Square Inches, Square Feet, Square Yards, Square Miles, Acres, Ares, Hectares - Base: Binary, Octal, Decimal, Hexadecimal - Digital Storage: Bits, Bytes, Mib, Gib, Tib, Pib, Megabytes, Gigabytes, Terabytes, Petabytes - Electric Charge: C, Mah, Kah, Ah, Mah, Μah - Electric Potential Difference: Mv, Kv, Volts, Mv, Μv - Electric Resistance: Mω, Kω, Ohms, Mω, Μω - Energy: Kilojoules, Joules, Kilocalories, Calories, Kilowatt-Hours - Frequency: Thz, Gigahertz, Megahertz, Kilohertz, Hertz, Mhz, Μhz, Nhz - Fuel Efficiency: Liters Per 100 Kilometers, Miles Per Gallon, Miles Per Imp. Gallon - Length: Millimeters, Centimeters, Decimeters, Meters, Kilometers, Light Years, Inches, Feet, Yards, Miles - Mass: Kilograms, Grams, Dg, Cg, Milligrams, Micrograms, Ng, Pg, Ounces, Pounds, Stones, Metric Tons, Tons, Carats, Troy Ounces, Slug - Power: Tw, Gigawatts, Megawatts, Kilowatts, Watts, Milliwatts, Μw, Nw, Pw, Fw, Horsepower - Pressure: N/M², Gpa, Mpa, Kpa, Hectopascals, Inches Of Mercury, Bar, Millibars, Millimeters Of Mercury, Pounds-Force Per Square Inch - Speed: Kilometers Per Hour, Meters Per Second, Knots - Temperature: Degrees Celsius, Degrees Fahrenheit, Kelvins - Time (Duration): Milliseconds, Seconds, Minutes, Hours, Days, Weeks, Months, Years, Decade, Century - Volume: Megaliters, Kl, Liters, Deciliters, Centiliters, Milliliters, Cubic Kilometers, Cubic Meters, Dm³, Mm³, Cubic Inches, Cubic Feet, Cubic Miles Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is monetization model: Unit Converter at freemium against Pudding Scan's subscription. Unit Converter also leads on update cadence (every 9 days vs every 5 weeks) and review sentiment (100% vs 91%). Pudding Scan's advantage is ratings volume (211 vs 18) and iOS requirement (13 vs 15.0). On price, rating, ads and in-app purchases 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. Pudding Scan sells 11 in-app purchases, starting at $0.99 per month and Unit Converter sells 4 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.9 for Pudding Scan against 4.9 for Unit Converter. That said, the two scores are not equally well evidenced: Pudding Scan has 211 ratings behind it against 18, so its average is the more settled of the two. Written reviews are what separate them: 91% of Pudding Scan's written reviews are positive against 100% of Unit Converter's.
Pudding Scan ships an update every 5 weeks, Unit Converter every 9 days. The most recent releases landed on October 25, 2026 and October 21, 2026 respectively.
| Parameter | Pudding Scan | Unit Converter |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (211 ratings) | 4.9 (18 ratings) — better |
| Positive reviews | 90.9% of reviews | 100.0% of reviews — better |
| Number of ratings | 211 — better | 18 |
| Update frequency | Every 5 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Freemium — better |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac, Vision Pro — better |
| Requires iOS | 13 — better | 15.0 |
| Further details — not scored | ||
| Size | 146 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | 广东天宸网络科技有限公司 | ZIJIAN CHEN |
Customer experience
Pudding Scan
Unit Converter
Bugs and requests
Pudding Scan
Reported bugs
7 issues- WeChat login redirects to phone login
- App crashes or shows black screen on iPhone 13 Pro Max with iOS 17.0
- App shows 'loading' and won't open after update
- App crashes on iOS 13.3.1
- Test paper erasure only allows selecting one image
Show 2 moreShow fewer
- Direct sharing of images results in severe pixel compression
- Scanning results disappear after switching apps
Requested features
20 requests- Improve filter functionality
- Add finger removal feature
- Enhance auto-scan capabilities
- Improve PDF to image processing
- Add multiple document combinations for ID scanning
Show 15 moreShow fewer
- Add volume button for scanning
- Add dark mode
- Simplify document opening and navigation
- Add pull-down to exit document feature
- Add left swipe to return feature
- Remove left/right document browsing
- Improve close-up focus for scanning
- Add text-to-speech functionality
- Add ability to change phone number account binding
- Add option to re-select initial interface functions
- Add cloud storage for Android
- Add text straightening for scanned books
- Add ability to apply 'remove shadow' to all pages
- Add long image generation for sharing after scanning
- Add border for easier positioning in photo interface
Unit Converter
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Pudding Scan
- Auto-renewal monthly plan1 Month trial$0.991 Month
- Auto-renewal monthly plan$0.991 Month
- Monthly Subscription1 Month trial$3.991 Month
Show 4 moreShow fewer
- Monthly Subscription$3.991 Month
- Annual Subscription$9.991 Year
- Annual Subscription$31.991 Year
- Annual Subscription1 Year trial$31.991 Year
- 1-month membership$1.99
- 布丁扫描会员(一年会员优惠)$9.99
- 布丁扫描会员(一年会员)$14.99
Show 1 moreShow fewer
- Lifetime membership$29.99
Unit Converter
- Pro Version (1 Month)14 Days trial$0.991 Month
- 1 cup of orange juice.$0.99
- 1 litre of orange juice.$2.99
- Pro Version (Lifetime)$3.99









