InterSpec
William C Johnson Tools
Spectral gamma radiation analysis app.
- Rating
- 5.0
- 20 ratings
- Downloads
- 1.8K+
- on Google Play
- Price
- Free
- No in-app purchases
- Updated
- Aug 18
- 2026 · v1.0.14
Screenshots
About InterSpec
InterSpec is a peak-based spectral analysis app for gamma and x-ray radiation detected by NaI, CsI, LaBr, HPGe, CZT, or similar detector types. InterSpec assists in performing nuclide ID, fitting for source activity, shielding amounts or types, and nuclide ages. It also has a number of useful tools related to gamma radiation, including: peak fitting, dose calculations, nuclide decay references, nuclide decay calculator, gamma/xray/reaction reference lines, handles self attenuating sources, energy calibration, spectrum file meta-data data editing, opens most spectrum file formats and exports to a number of common formats, and more.
Created by Sandia National Laboratories.
Please see https://github.com/sandialabs/InterSpec for source code and executables for other platforms.
Licensed under the LGPL v2.1 open source license.
DISCLAIMER OF LIABILITY NOTICE:
The United States Government shall not be liable or responsible for any maintenance,
updating or for correction of any errors in the SOFTWARE or subsequent approved version
releases.
THE INTERSPEC (SOFTWARE) AND ANY OF ITS SUBSEQUENT VERSION
RELEASES, SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF
ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT
NOT LIMITED TO, ANY WARRANTY THAT THE SOFTWARE WILL CONFORM TO
SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY
WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY
THAT THE DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE
SOFTWARE. IN NO EVENT SHALL THE UNITED STATES GOVERNMENT OR ITS
CONTRACTORS OR SUBCONTRACTORS BE LIABLE FOR ANY DAMAGES,
INCLUDING, BUT NOT LIMITED TO, DIRECT, INDIRECT, SPECIAL OR
CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, OR IN ANY
WAY CONNECTED WITH THE SOFTWARE OR ANY OTHER PROVIDED
DOCUMENTATION, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT,
TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY
PERSONS OR PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS
SUSTAINED FROM, OR AROSE OUT OF THE RESULT OF, OR USE OF, THE
SOFTWARE OR ANY PROVIDED DOCUMENTATION. THE UNITED STATES
GOVERNMENT DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING
THIRD PARTY SOFTWARE, IF PRESENT IN THE SOFTWARE, AND DISTRIBUTES
IT "AS IS."
Created by Sandia National Laboratories.
Please see https://github.com/sandialabs/InterSpec for source code and executables for other platforms.
Licensed under the LGPL v2.1 open source license.
DISCLAIMER OF LIABILITY NOTICE:
The United States Government shall not be liable or responsible for any maintenance,
updating or for correction of any errors in the SOFTWARE or subsequent approved version
releases.
THE INTERSPEC (SOFTWARE) AND ANY OF ITS SUBSEQUENT VERSION
RELEASES, SOFTWARE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY OF
ANY KIND, EITHER EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING, BUT
NOT LIMITED TO, ANY WARRANTY THAT THE SOFTWARE WILL CONFORM TO
SPECIFICATIONS, ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
FOR A PARTICULAR PURPOSE, OR FREEDOM FROM INFRINGEMENT, ANY
WARRANTY THAT THE SOFTWARE WILL BE ERROR FREE, OR ANY WARRANTY
THAT THE DOCUMENTATION, IF PROVIDED, WILL CONFORM TO THE
SOFTWARE. IN NO EVENT SHALL THE UNITED STATES GOVERNMENT OR ITS
CONTRACTORS OR SUBCONTRACTORS BE LIABLE FOR ANY DAMAGES,
INCLUDING, BUT NOT LIMITED TO, DIRECT, INDIRECT, SPECIAL OR
CONSEQUENTIAL DAMAGES, ARISING OUT OF, RESULTING FROM, OR IN ANY
WAY CONNECTED WITH THE SOFTWARE OR ANY OTHER PROVIDED
DOCUMENTATION, WHETHER OR NOT BASED UPON WARRANTY, CONTRACT,
TORT, OR OTHERWISE, WHETHER OR NOT INJURY WAS SUSTAINED BY
PERSONS OR PROPERTY OR OTHERWISE, AND WHETHER OR NOT LOSS WAS
SUSTAINED FROM, OR AROSE OUT OF THE RESULT OF, OR USE OF, THE
SOFTWARE OR ANY PROVIDED DOCUMENTATION. THE UNITED STATES
GOVERNMENT DISCLAIMS ALL WARRANTIES AND LIABILITIES REGARDING
THIRD PARTY SOFTWARE, IF PRESENT IN THE SOFTWARE, AND DISTRIBUTES
IT "AS IS."
User reviews
A phone isn't the easiest device for doing nuclear science but if you happen need to quickly look at some data on the go, it is pretty functional. I don't think I'm going to trip over any U235 while I'm walking my dog, though. Maybe I'll wave a gamma ray spectrometer over the bananas next time I go grocery shopping....
Great gamma spectroscopy app for spectral analysis
This is INSANELY GOOD!!!!! How did I just learn about this now? Super intuitive, super quick to learn, but does almost anything you want it to. Haven't had the chance to play with the shielding and dose calculators yet, but so far it did a wonderful job with NaI and HPGe data. Was able to sort out a bunch of unknown...
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