iPhone Screenshots


With over 1100 isotopes, the following can be done:
1. Calculating the decayed activity with different units (mCi or Bq).
2. See the decay chart:
- In the chart, it is easy to find out all decay points by simply tapping on the graph.
- The graph can be redrawn with the desired activity (input) and units.
- Snapshot can be taken and saved to camera-roll directly.
3. Estimating the dose rate from each isotope (as a point source only and < 2 MV) at different distances with (mCi or MBq) and (meter or feet) units. Optionally, shielding can be incorporated in the calculations as well.
4. Inverse Square Law is introduced.
5. Look up for detailed information through wikipedia.
To simply deal with such huge list of isotopes, all isotopes tables are equipped with reliable search engines to filter for the wanted isotope.
With a user friendly radiation units convertor, it is easy to convert between radiation units like exposure, absorbed and equivalent doses.
For more convenience a calculator keyboard was adopted to replace the normal keyboard in order to complete simple mathematical operations
The App is built with tap gesture (swipe right) ability to get back to the previous pages.

What’s New

Version V 2.2

Fix for cGy error in units conversion tab.

Ratings and Reviews

4.8 out of 5
22 Ratings

22 Ratings

Dmh11b ,

Fun app

Amazing app! I spend a lot of time playing around on it! It would be awesome to add counts per min in the activity conversions and maybe the crashing issue when you look at the decay rate of heavier isotopes like Pu 239! Otherwise beautiful app!

Developer Response ,

Thank you very much for your review. I’ll try to fix the crashing issue soon. In conversion tab, there is dps and dpm (disintegration per seconds and per minutes). However for cpm conversion, other factors should be involved like detector and radiation type.


Conversion issue

App is great, glad to see it available there is a conversion error with centigray to rad. 1 centigray should equal 1 rad. Please adjust if you can! Update did not fix this issue. But cool to see a new look.

Developer Response ,

Thank you very much for your review and I am really disappointed about the conversion glitch. I will upload another version ASAP.

عبدالله آل حمود ,


الله يعطيك العافية سهلت امور كثيرة في هذا التطبيق


Mohamed Allabban
17.2 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
Infrequent/Mild Medical/Treatment Information


  • Family Sharing

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

You May Also Like