# NuclideChart

> Interactive nuclide chart displaying all known isotopes with detailed nuclear data. (iPhone/iPad app by Christian Bonnin.)

- Source: https://appshunter.io/ios/app/nuclidechart/id434048820 (this page in markdown: same URL + `.md`)
- Developer: [Christian Bonnin](https://appshunter.io/developer/301312972)
- Category: Education, Reference
- Price: Free
- Rating: 3.00/5 from 3 App Store ratings · 22 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 1 MB
- Languages: English, French
- Released: 2011-06-29
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/nuclidechart/id434048820/reviews.md

## What is NuclideChart?

Nuclide chart of all known isotopes (3343). You can zoom in and out and move in all directions. 
Touch a cell to get all data about a nuclide as well as its location in Mendeleiev's periodic table.
You will have to purchase the extension to see the description of isotopes of elements above hydrogen.
Select a disintegration mode and thus follow a disintegration chain.
Search elements by their name or atomic number and display their isotopes list.
Some isotopes were cited after Tchernobyl and Fukushima accidents (Iodine-131, Cesium-137 and 134). Find out their half-lives (time it takes to decrease by half) and their child nuclide.

Informations provided:
 - Atomic number (number of protons)
 - Number of neutrons 
 - Mass excess 
 - Binding Energy by nucleon
 - Beta Decay Energy
 - Atomic Mass
 - Spin
 - Half-life duration
 - Abundance
 - Decay modes and branching (except isomeric transitions (IT) because they do not product a new isotope but instead a more stable configuration of the same one)

The informations were extracted from the NuDat 2 database of the National Nuclear Data Center (Brookhaven National Laboratory).
Furthermore, four candidates for the island of stability are displayed as a guidepost with the terms "not yet observed" instead of the half-life duration.

## Key features

- Interactive nuclide chart
- Zoom and pan functionality
- Detailed nuclide data
- Disintegration chain tracking
- Element search by name/atomic number
- Information on isotopes from accidents

## Recent user reviews (10 of 22)

All indexed reviews: https://appshunter.io/ios/app/nuclidechart/id434048820/reviews.md

### 2/5 — Not ready for iPhone X

*2018-04-12, version 1.3*

Hasn’t worked by touching isotopes since I got a new phone. Love it when it works.

### 2/5 — Many features don’t work

*2017-11-05, version 1.3*

The legend doesn’t work
Touching an isotope label to get info doesn’t work
The periodic tale is not available

### 4/5 — Good, functional nuclide chart

*2016-01-27, version 1.2.1*

I like the extension feature that graphically displays the decay transformation.  When you select an isotope, it displays the decay modes.  When you select the decay mode, it jumps back to the chart and shows the tranformation to the next isotope, which you can select and continue the visualization of the chain of transformations.  Note that this feature requires the $1.99 in app purchase, but is well worth it!

### 4/5 — Very nice

*2014-07-18, version 1.2*

Great app.  $2.  I don 't know why that isn't on the description.  No!  It is not $2 per nuclide.  It is a one-time payment for all.

### 1/5 — Sneaky

*2014-01-21, version 1.2*

Requires an in-app purchase to be useful, but they want you to buy it without telling you how much it is. Sneaky and dishonest.

### 4/5 — Charges you, but worth the price

*2013-10-10, version 1.2*

This app costs $2, the developer does not mention that in the description. However, it is one of the easiest to use nuclide charts around, and is very accurate. Only 4 stars because of the hidden purchase, but the price is negligible, considering what you are getting.

I initially got the issue where I payed for it and didn't download, but after trying again it worked, and I was only charged once.

This is the most fluid include table available, it looks nice and makes it easy to scroll and zoom. 
I have yet to find any incorrect information yet, after comparing values to both Korean charts and BNL data. It is not all-inclusive with information but has mostly everything you could need for nuclear calculation, at least for introductory levels.

### 1/5 — Don't waste your money

*2013-08-16, version 1.2*

This app is very deceptive.. You pay 1.99 for EACH element you want to see

Not 1.99 to make the whole app workable and viewable.. 

Piece of Junk

Don't bother

### 1/5 — Just Hydrogen

*2013-05-23, version 1.2*

When I first downloaded this app a couple years ago it was awesome.  Now, however it has become completely useless unless you purchase the "extension".  Why not just be up front about it and charge for the app from the beginning and unlock all the features?

At the very least, allow some access to heavier isotopes to get a better feel for the app if you're going to charge extra for the full version.

I probably would upgrade this app anyway, if I were still working in this particular area of science.  As things stand now, I'll be putting my money elsewhere.

### 1/5 — WRONG INFO!

*2013-04-03, version 1.1*

Look at Co-57. The program incorrectly show a strong beta released that is not there.  In fact most of the electron capture nuclide emission information would be incorrect.

### 1/5 — Ripoff

*2013-03-20, version 1.1*

You have to purchase separate app extension for each isotope to see details.

## Frequently asked questions about NuclideChart

### What information does NuclideChart provide about isotopes?

NuclideChart provides atomic number, number of neutrons, mass excess, binding energy per nucleon, beta decay energy, atomic mass, spin, half-life duration, abundance, and decay modes. It also includes information on isotopes related to nuclear accidents like Chernobyl and Fukushima.

### How can I navigate the NuclideChart?

You can zoom in and out and move in all directions on the chart to explore different isotopes. Tapping on a specific cell will reveal all data about that nuclide.

### Can I see disintegration chains in NuclideChart?

Yes, you can select a disintegration mode and follow the resulting disintegration chain to see how isotopes transform into others.

### How do I find specific elements or isotopes in NuclideChart?

You can search for elements by their name or atomic number. The app will then display a list of their isotopes.

### What is the source of the data in NuclideChart?

The information in NuclideChart is extracted from the NuDat 2 database of the National Nuclear Data Center at Brookhaven National Laboratory.

### Is NuclideChart available on multiple devices?

NuclideChart is supported on iPhone, iPad, iPod, and Apple Watch, making it accessible across various Apple devices.

### When was NuclideChart last updated?

The latest version of NuclideChart, 1.3, was last updated on March 14, 2017. The app was initially released on June 29, 2011.

### What is the age rating for NuclideChart?

NuclideChart has an age rating of 4+, making it suitable for a wide range of users interested in educational content.

## Version history (last 1 release)

### 1.3 — 2017-03-14

This app has been updated by Apple to display the Apple Watch app icon.

Tested under iOS 10.2
New element names validated by IUPAC (International Union of Pure and Applied Chemistry)
Displays decay chains on the chart view

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## More apps by Christian Bonnin

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All apps by Christian Bonnin: https://appshunter.io/developer/301312972

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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 2026-06-10.*