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Feature rich unit converter and calculator to handle any conversion you could possibly imagine at one go. Enjoy the new face of conversion and calculations.

Optimized for Speed and Ease of Use

Select one unit, view all possible conversions on one screen. Calculate and share mathematical operations with powerful widget in real time. Now quickly search units and categories for swift use. Intelligent Calculator and Convertor in One.


  • Access 35 ready to go categories with more than 1000 units
  • Use backspace anytime to correct a simple mistake, instead of calculating all over again
  • Comprehensive support for 157 world currencies
  • Full compatibility, starting from iPhone 4s upto iPhone 6 plus with iPad, including support of iOS 7 and 8
  • Directly access your favorite units list from home screen
  • Elegant and sophisticated interface with gorgeous backgrounds
  • Tap on Math expression to edit and add your notation to each number

Widget Notifications Center

Get your preferred converter categories and mathematics calculations for fast access through notification center as Widget. Experience the power of widget exclusively designed for iOS 8.

Calvetr Notification

Sharing Made Easy

Add personal notes to saved conversions or share complete calculation with your friends through Email or Airdrop or Print it.

Labs Weather 2

Live Math Expression

Create live math expression. Automatically save your complete expression for future use.

Maths Expression

Get Now

Download free Calvertr app for Android & IOS to enjoy beautiful mornings.

Let's Talk

Let us know if there’s an opportunity for us to build something awesome together.


18 Bartol Street Suite #130,
San Francisco CA 94133


2430 Camino Ramon,
San Ramon CA 94583


1006 Pinnacle, Corporate Road,
Ahmedabad, GJ 380051


+1 650.451.1499