# Radioactive Decay Calculator > Calculates radiochemical concentration, specific activity, and molarity based on isotope half-life. (iPhone/iPad app by PerkinElmer Informatics, Inc.) - Source: https://appshunter.io/ios/app/radioactive-decay-calculator/id846834886 (this page in markdown: same URL + `.md`) - Developer: [PerkinElmer Informatics, Inc](https://appshunter.io/developer/606379943) - Category: Utilities, Reference - Price: Free - Rating: 2.80/5 from 12 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 7.0 · 8 MB - Languages: English - Released: 2014-04-02 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/radioactive-decay-calculator/id846834886/reviews.md ## What is Radioactive Decay Calculator? Radioactive Decay Calculator for determining radiochemical concentration, specific activity and molarity on a specific date. Required input: • Isotope • Current Concentration and Specific Activity • Calibration date • Use Date Users can input the current specifications of a radiochemical to calculate what the concentration, specific activity and molarity of that compound will be on any given date based on the half life of the isotope. Values can be determined for future use or to back date their calculations. ## Key features - Determine radiochemical concentration - Calculate specific activity - Compute molarity - Input isotope details - Use calibration and use dates - Based on half-life calculations ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/radioactive-decay-calculator/id846834886/reviews.md ### 1/5 — App needs to be updated *2023-10-23* This app needs to be updated to work with iOS 17.0.3 ### 1/5 — Disappointed how do I get my money back. Totally useless *2018-12-24, version 1.0* If I am looking at it correctly there seems to be a very l limited list of isotopes to choose from. Surprise. Common isotopes are not available. ### 1/5 — Would be great.... *2018-01-09, version 1.0* No 99m-tc. One of the MAIN isotopes used in nuclear medicine. ### 5/5 — Beautiful App *2014-04-03, version 1.0* One of the most beautiful science calculators on the store. Also makes a very nice short report that can be emailed and added to a lab notebook or technicians work list. ## Frequently asked questions about Radioactive Decay Calculator ### What does Radioactive Decay Calculator do? Radioactive Decay Calculator helps determine the radiochemical concentration, specific activity, and molarity of an isotope on a specific date. It uses the isotope's half-life to calculate these values for future or past dates. ### What information do I need to use Radioactive Decay Calculator? To use Radioactive Decay Calculator, you need to input the specific isotope, its current concentration and specific activity, the calibration date, and the desired use date. ### Can Radioactive Decay Calculator be used for isotopes with short half-lives? Yes, the calculator is designed to work with any isotope, regardless of its half-life. It accurately calculates decay based on the provided half-life data for the specific isotope. ### What devices is Radioactive Decay Calculator available on? Radioactive Decay Calculator is available on iPhone and iPad devices. It is designed for iOS users. ### How often is Radioactive Decay Calculator updated? Radioactive Decay Calculator was last updated on April 2, 2014, with version 1.0. There have been no subsequent updates since its initial release. ### What is the age rating for Radioactive Decay Calculator? Radioactive Decay Calculator has an age rating of 4+. This indicates it is suitable for users aged four and above. ### Does Radioactive Decay Calculator have ads? The provided data does not specify whether Radioactive Decay Calculator contains advertisements. It is listed as free with no mention of ads or in-app purchases. ### What is the user rating for Radioactive Decay Calculator? Radioactive Decay Calculator has a user rating of 2.8 stars based on 12 ratings. This suggests a mixed reception from its user base. ## Version history (last 1 release) ### 1.0 — 2014-04-02 No release notes. ## Apps similar to Radioactive Decay Calculator | App | Rating | Price | Category | | --- | --- | --- | --- | | [EMF Calculator](https://appshunter.io/ios/app/emf-calculator/id1504448425) | — | Free | Utilities | | [RadEye Mobile](https://appshunter.io/ios/app/radeye-mobile/id1279270356) | 3.7 (3) | Free | Utilities | | [Teslameter.](https://appshunter.io/ios/app/teslameter/id976926346) | 2.0 (3) | Free | Utilities | | [My Physics Calculator](https://appshunter.io/ios/app/my-physics-calculator/id827404220) | 4.3 (44) | $2.99 | Utilities | | [AccuRad Training](https://appshunter.io/ios/app/accurad-training/id1513897458) | — | Free | Utilities | | [Nuke Bomb Simulator-Science](https://appshunter.io/ios/app/nuke-bomb-simulator-science/id1670600952) | 3.1 (27) | $2.99 | Utilities | ## More apps by PerkinElmer Informatics, Inc - [CongoRed App](https://appshunter.io/ios/app/congored-app/id1495224846) All apps by PerkinElmer Informatics, Inc: https://appshunter.io/developer/606379943 --- *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.*