Unhexennium (IUPAC's name for the 169th element) is an ad-free, open-source, offline chemistry calculator.

It provides support for:

* Chemical element
- location on the periodic table
- name
- chemical symbol
- atomic number
- relative atomic mass
- electronegativity
- electron configuration (abbreviated, box and arrow)
- common oxidation states and ions
* Chemical formula
- name(s)
- relative formula mass
- empirical formula
- percentage by mass of the constituent atoms
- oxidation states of the constituent atoms
- bond type
- mass / mole calculations
- ideal gas calculations (PV = nRT)
* Chemical equation
- equation balancer (redox reactions are supported)
- mass / mole calculations
- limiting reactant
- atom economy

This application is developed using google's new mobile framework, flutter. The source code is available on

What’s New

Version 1.2.1

New features:
* You can now enter an equation by text - no more adding and editing individual formulae!
* As you type the equation, suggestions for possible formulae are shown - tap on one to complete the formula under cursor!
* Tap on the 'Clear' button to delete the formula / equation - no need to hold down backspace!

* Input suggestions that start with the current formula are now moved up to the top
* Input suggestions that begin with a '(' or a '[' are now moved to the bottom
* 'Done' buttons are now renamed to 'Apply changes'
* The info button icons are now changed to zoom in icons
* The 'clear' button (looking like a 'x') are now replaced by to '0'
* Change buttons and colours in formula charge editor

App Privacy

The developer, Jingjie Yang, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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