CalcKing Pro-Professional
Trigonometric functions
Only for iPhone
Free · In-App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Professional engineering calculator, the mobile computing tool for engineers!
No ad interference: Specifically designed for engineers, with a pure usage experience and no pop-up ads.
Full coverage of core functions:
Basic scientific calculations: Trigonometric functions, logarithms and exponents, power operations, constant calls (π/e, etc.), support for degree/radian conversion, meeting general calculation needs.
12 types of unit conversions: Length, weight, area, volume, temperature, speed, etc., covering meters/cm/inches, kilograms/pounds, etc. Common sub-units, one-click quick conversion.
Base conversion: Supports binary, octal, decimal, and hexadecimal conversions, suitable for electronic/computer engineering scenarios.
Specialized engineering calculations: Built-in mechanics, circuits, materials, etc. Modules, solving professional problems such as force on inclined planes, series resistors, etc.
User-friendly design:
Portrait operation: Compatible with iPhone, using the vertical screen in engineering scenarios is more convenient.
Local saved calculation history: Automatically records the last 20 calculations, not lost when uninstalling, and can be recalled at any time.
Precise adaptation: Optimized for on-site work by engineers, clear display of large numbers, real-time input verification to avoid errors.
Efficient work, time and effort-saving: From basic formulas to complex engineering problems, all are covered, helping you focus on core work!
Ratings & Reviews
- This app has not received enough ratings or reviews to display an overview.
This update:
1. Fixed bugs.
The developer, 文娟 唐, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Provider
- 文娟 唐
- Size
- 1.6 MB
- Category
- Utilities
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Simplified Chinese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 解锁功能 QAR 14.99
- Copyright
- © CalcKing Pro+2026