Calki: Retro OCR Calculator

Number Scanner Lens & Tape

Only for iPhone

Free

iPhone

Calki now speaks your language! Scan numbers, convert units & calculate in 20+ languages. Effortlessly local, 100% ad-free. Calki: Smart Camera Calculator The ad-free calculator app that scans numbers, converts units, and gets out of your way. Calki combines a powerful camera number scanner, a full-featured unit converter, and a beautifully designed calculator, all in one lightweight, 100% ad-free app. No banners. No pop-ups. No interruptions. Ever. UNIT CONVERTER Convert across 12 categories instantly: Length, Weight, Volume, Temperature, Speed, Pressure, Power, Force, Energy, Area, Time, Currency. Built directly into Calki: no switching apps, no extra downloads. Need something specific? Create your own custom units for any category, tailored to your workflow. CAMERA NUMBER SCANNER (OCR) Point your camera at any receipt, document, or screen and grab numbers instantly. Op-Mode: Auto-apply an operation (+, -, ×, ÷) after every scan, ideal for tallying receipts or batch entries. Auto-Detect: Rapid-fire scanning that locks onto the dominant number on screen. Manual Mode: Preview and confirm each number before it enters your calculation. Scanner also works inside Converter Mode, scan a value and convert it on the spot. Limited Time: Premium Scanner features are FREE for two months. SMART CALCULATOR Live Preview: Expression and result update in real-time as you type. Advanced History: Label calculations, double-tap to reuse results, long-press to edit past expressions. Bulk Actions: Multi-select clear and save to keep your history clean. THEMES & CUSTOMIZATION Choose from a curated set of professional fonts and elegant themes. Prefer something with personality? The Retro Theme now includes an optional CRT scanline effect: a nostalgic nod to classic calculators, built for modern screens. TICKER DISCOVERY SYSTEM Calki keeps its interface clean and clutter-free, no tutorial pop-ups, no intrusive onboarding. Instead, a subtle ticker system surfaces hidden features and tips right when they're relevant. Each ticker quietly deactivates itself once you've used the feature it's pointing to, so the hints always stay fresh and useful. If tickers feel distracting, you can turn them off entirely from Settings. WHY CALKI? 100% Ad-Free, forever, no exceptions Privacy first, minimal data collection limited to feature usage and error reporting, so we can keep improving the app Discover powerful features naturally, without pop-ups or forced tutorials Haptic feedback and smooth animations throughout Fast startup, lightweight, optimized for all devices Ideal for students, professionals, travelers, and everyday use Download Calki: the smarter, cleaner calculator app.

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New Feature: Operation Chaining! You can now easily repeat the last operation of a previous calculation simply by pressing the equals button a second time. To keep things perfectly clear and avoid any confusion, we’ve also added an on-screen counter that displays exactly how many times the operation has been repeated. Calki is now Global! 20+ New Languages: We’ve localized the app into more than 20 languages so more people can enjoy a cleaner, smarter math experience. Help Us Improve: We’ve put great effort into these translations, but we want to get them perfect. If you notice any translation errors or UI issues that don’t align with your local conventions, please let us know. Feedback: Use the Contact Us option in the menu to reach out. Your feedback helps us make Calki better for everyone.

The developer, Vimal Parthan, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Usage Data
    • Diagnostics

Privacy practices may vary based, for example, on the features you use or your age. Learn More

The developer has not yet indicated which accessibility features this app supports. Learn More

Seller
  • Vimal Parthan
Size
  • 43.4 MB
Category
  • Utilities
Compatibility
Requires iOS 18.0 or later.
  • iPhone
    Requires iOS 18.0 or later.
Languages
Arabic and 26 more
  • Arabic, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Hungarian, Indonesian, Italian, Japanese, Korean, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Spanish, Swedish, Thai, Traditional Chinese, Turkish, Ukrainian, Vietnamese
Age Rating
4+
Copyright
  • © 2026 Vimal Parthan. All rights reserved.