# Chem_Calculator — with elegant periodic table

> Molecular weight calculator for organic chemists with an integrated periodic table. (iPhone/iPad app by 铠宁 雷.)

- Source: https://appshunter.io/ios/app/chem-calculator/id1253476119 (this page in markdown: same URL + `.md`)
- Developer: [铠宁 雷](https://appshunter.io/developer/1631727209)
- Category: Education, Utilities
- Price: Free
- Rating: 4.30/5 from 152 App Store ratings · 6 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 34 MB
- Languages: American English
- Released: 2017-06-29
- Data updated: 2026-07-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/chem-calculator/id1253476119/reviews.md

## What is Chem_Calculator?

All organic chemists should have, best calculator for molecular weight in App Store!
- check element detail by long pressing element button
- elements, numbers, parenthesis mixed input, real-time result
- full-sized periodic table, period 1, 2, 3 elements were combined in one line
- save, delete or edit your result
- more features on the way...

## Key features

- Molecular weight calculation
- Full-sized periodic table
- Real-time results
- Save, edit, and delete calculations
- Element detail lookup

## Recent user reviews (6 of 6)

All indexed reviews: https://appshunter.io/ios/app/chem-calculator/id1253476119/reviews.md

### 1/5 — Won’t let me add a plus sign

*2023-10-27, version 2.1.4*

Doesn’t allow me to add elements in a formula

### 4/5 — Future feature I would like to see

*2023-05-29, version 2.1.4*

I like the interface and history recall.  I would also like to see the ability to use those molecular weights in a calculation for converting a given sample weight of a compound of known molecular weight and finding the molar amount; a common issue in dissolved compound measurements.

### 5/5 — Very helpful, but have two suggestions

*2019-12-12, version 2.0.0*

1, it will be great is we can move the cursor and modify the formula;
2, can you add the isotope information too?

### 2/5 — 🤷‍♂️

*2018-09-15, version 1.1.2*

Doesn’t calculate to the hundredth place, I get that varies but could just use the weight on the periodic table

### 1/5 — Need more refinement

*2017-10-17, version 1.1.2*

The graphic user interface could be improve.  It is confusing o how to enter the molecular formula and get the molecular weight. There are better apps out there.

The App Elements is much better.  There is a Pro version if you need more capability.

### 5/5 — Very useful

*2017-10-08, version 1.1.2*

Can be helpful doing homework

## Frequently asked questions about Chem_Calculator

### What is Chem_Calculator used for?

Chem_Calculator is primarily used for calculating molecular weights. It features a comprehensive periodic table and allows for real-time calculations with mixed input of elements, numbers, and parentheses.

### Is Chem_Calculator free to use?

Yes, Chem_Calculator is completely free to download and use. It does not have any in-app purchases or advertisements.

### What devices is Chem_Calculator compatible with?

Chem_Calculator is available for iPhone, iPad, and iPod devices. It is designed to run on iOS.

### How often is Chem_Calculator updated?

The app was last updated on April 30, 2023, with version 2.1.4. While specific update frequency isn't detailed, this indicates ongoing development.

### What is the age rating for Chem_Calculator?

Chem_Calculator has an age rating of 4+, making it suitable for a wide range of users, including younger students learning about chemistry.

### Can I save my calculations in Chem_Calculator?

Yes, Chem_Calculator allows you to save, delete, and edit your calculation results, making it convenient to keep track of your work.

### How can I find details about specific elements in Chem_Calculator?

You can check element details by long-pressing on the element button within the app's periodic table interface.

### Does Chem_Calculator offer offline functionality?

The description does not explicitly mention offline functionality, but its core features like calculation and periodic table access are likely available without an internet connection.

## Version history (last 5 releases)

### 2.1.4 — 2023-04-30

Version 2.1.1 - 2.1.4
-- Fix an icon display issue
-- Other Bug fixes

*******************************
Version 2.1.0
-- Finally, La & Ac series elements added!
-- Support for iOS 14
-- Bug fix

*******************************
Version 2.0.1
The best now become better. Check out those new features!
-- Concise UI
-- Help mode, which could show hints of buttons
-- Browse history on main interface
-- Elemental analysis
-- Full support for iOS 13

### 2.1.3 — 2022-02-20

Version 2.1.1, 2.1.2, 2.1.3
-- Fix an icon display issue
-- Other Bug fixes


*******************************
Version 2.1.0
-- Finally, La & Ac series elements added!
-- Support for iOS 14
-- Bug fix

*******************************
Version 2.0.1
The best now become better. Check out those new features!
-- Concise UI
-- Help mode, which could show hints of buttons
-- Browse history on main interface
-- Elemental analysis
-- Full support for iOS 13

### 2.1.2 — 2021-10-25

Version 2.1.1, 2.1.2
-- Bug fix

*******************************
Version 2.1.0
-- Finally, La & Ac series elements added!
-- Support for iOS 14
-- Bug fix

*******************************
Version 2.0.1
The best now become better. Check out those new features!
-- Concise UI
-- Help mode, which could show hints of buttons
-- Browse history on main interface
-- Elemental analysis
-- Full support for iOS 13

### 2.1.1 — 2021-02-13

Version 2.1.1
-- Bug fix

*******************************
Version 2.1.0
-- Finally, La & Ac series elements added!
-- Support for iOS 14
-- Bug fix

*******************************
Version 2.0.1
The best now become better. Check out those new features!
-- Concise UI
-- Help mode, which could show hints of buttons
-- Browse history on main interface
-- Elemental analysis
-- Full support for iOS 13

### 2.1.0 — 2020-10-15

Version 2.1.0
-- Finally, La & Ac series elements added!
-- Support for iOS 14
-- Bug fix

*******************************
Version 2.0.1
The best now become better. Check out those new features!
-- Concise UI
-- Help mode, which could show hints of buttons
-- Browse history on main interface
-- Elemental analysis
-- Full support for iOS 13

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*