Comparison

RedCrab Calculator vs Scanlys

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

Head to head
About

RedCrab Calculator

This powerful scientific calculator offers a modern UI and robust engine for users of all levels. It handles basic arithmetic to complex engineering equations with smart expression parsing and a high-precision display. Enjoy a seamless calculation experience with features like history recall and dark mode.

Highlights
  • Basic & Advanced Calculations
  • Smart Expression Parsing
  • Calculation History & Reuse
  • High-Precision Display
  • Dark Mode & Modern UI
  • VIP Ad-Free Experience
Features
Read full description

The RedCrab Calculator is an efficient and powerful tool designed for students, engineers, professionals, and everyday users. Whether you're handling simple daily expenses or complex engineering algebra, it provides a precise and lightning-fast calculation experience. Combining an elegant modern UI with a robust calculation engine, every tap is a seamless experience. Key Features: - Basic & Advanced Calculations : Flawlessly supports basic arithmetic alongside advanced scientific functions including trigonometry (sin, cos, tan), logarithms (log, ln), exponents (^), roots (ⁿ√x), and modulo (%). - Smart Expression Parsing : Supports nested parentheses and long expression inputs. It strictly follows mathematical order of operations, displaying exactly what you calculate to ensure accuracy in complex equations. - History & Result Reuse : Automatically saves your calculation history. The dedicated "Ans" button allows you to instantly recall your last answer, making multi-step calculations a breeze. - High-Precision Display : Optimized large number display logic supports showing more significant digits, eliminating the frustration of forced and hard-to-read scientific notation. - Dark Mode & Modern UI : Native support for Dark Mode to protect your eyes. Carefully tuned button layouts, smooth highlight touch feedback, and dynamic font scaling deliver an ultimate user experience. - VIP Privileges : Unlock VIP membership to enjoy a pure, ad-free, immersive calculation experience, along with access to exclusive premium features. Scientific Calculator: Making numbers clearer and calculations smarter.

About

Scanlys

Features
Read full description

Turn your iPhone into a powerful mobile scanner with Scanlys. Scanlys is the fastest and most intuitive way to digitize your world. From business contracts and receipts to handwritten notes and sketches, get high-quality scans in seconds. Say goodbye to bulky office scanners and keep your entire office in your pocket! Why Choose Scanlys? Smart Edge Detection: Automatically detects document borders and corrects perspective for a perfect crop every time. Crystal Clear Quality: Use advanced filters (Grayscale, Black & White, Photo) to make text sharp and easy to read. Multi-Page Scanning: Scan dozens of pages effortlessly and merge them into a single, organized PDF file. Export & Share: Save your documents as high-resolution PDFs or JPEGs. Share instantly via AirDrop, Email, or upload to iCloud, Google Drive, and Dropbox. Stay Organized: Manage your documents with ease. Rename, delete, and find your files in a heartbeat. Scanlys is perfect for: Professionals: Scan and sign contracts on the go. Students: Digitize whiteboard notes and textbooks for easy studying. Freelancers: Keep track of receipts and invoices for easy expense management. Everyone: Securely store copies of IDs, passports, and important records. Experience the most modern scanning experience. Simple, fast, and powerful. Download Scanlys today!

Screenshots

RedCrab Calculator4 screens
Scanlys2 screens

Verdict

The call

The clearest difference is update cadence: Scanlys at every 3 days against RedCrab Calculator's fortnightly. RedCrab Calculator's advantage is iOS requirement (15.6 vs 18.0). On price, ads, in-app purchases and device support 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

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

Both are free to download. RedCrab Calculator sells 1 one-off in-app purchase and Scanlys sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

RedCrab Calculator ships an update fortnightly, Scanlys every 3 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

Scorecard2 real differences Β· 6 level
RedCrab Calculator versus Scanlys: the parameters behind the verdict, then further details
ParameterRedCrab CalculatorScanlys
PriceFreeFree
Positive reviews100.0% of reviewsβ€”
Update frequencyFortnightlyEvery 3 days β€” better
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesβ€”
DevicesiPhone, iPad, iPod β€” betteriPhone, iPad
Requires iOS15.6 β€” better18.0
Further details β€” not scored
Size5 MB8 MB
Age rating4+4+
Developerε°‘ζ³½ 撁Kerem Gonlkrmaz

In-app purchases

1 purchases

RedCrab Calculator

One-time1
  • η»ˆθΊ«δΌšε‘˜$1.99
1 purchases

Scanlys

One-time1
  • Scanlys Pro$0.39

Questions

Is RedCrab Calculator free?
RedCrab Calculator is free to download, with in-app purchases available.
Is Scanlys free?
Scanlys is free to download, with in-app purchases available.
Do RedCrab Calculator or Scanlys have ads?
Both RedCrab Calculator and Scanlys show ads.
Which is updated more often, RedCrab Calculator or Scanlys?
RedCrab Calculator ships an update fortnightly, and Scanlys every 3 days. Most recently, RedCrab Calculator was updated on November 1, 2026 and Scanlys on October 31, 2026.

Other comparisons