Comparison

Decay Lab vs RadTool

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Decay Lab

Features
Read full description

DecayLab makes radionuclide decay calculations and radiation unit conversions quick and straightforward. Designed for nuclear medicine professionals, researchers, educators, and students, it provides a clean, focused workflow that works entirely offline. Key features: β€’ Calculate radioactive decay for a wide range of radionuclides β€’ View activity at different reference and calculation times β€’ Apply decay corrections quickly and consistently β€’ Work with Bq, kBq, MBq, GBq and TBq, alongside nCi, Β΅Ci, mCi and Ci β€’ Convert absorbed dose in Gy and rad, and equivalent dose in Sv and rem β€’ Convert dose rates per second, minute, hour or day β€’ See one value in every other unit at once, rather than one pair at a time β€’ Access built-in radionuclide half-life data for 1,625 nuclides β€’ Use all calculation features without an internet connection Gray and sievert are kept in separate tables. Converting between them requires a radiation weighting factor, which is a judgement about radiation type rather than a unit conversion, so DecayLab does not offer it. DecayLab is useful for: β€’ Nuclear medicine technologists β€’ Medical physicists β€’ Radiation safety professionals β€’ Researchers and educators β€’ Students in nuclear medicine and related fields Whether you're checking an activity value, preparing calculations for a workflow, or studying radioactive decay, DecayLab keeps the process clear and efficient. Important: DecayLab is a calculation and educational tool. Results should be independently verified before being used in clinical, diagnostic, therapeutic, or safety-critical decisions.

About

RadTool

Features
Read full description

RadTool – Intelligent Radiation Safety Assistant Radiation Protection Simplified. Safety Amplified. Description: RadTool is a powerful mobile application designed for radiation protection professionals, engineers, and safety officers working in industries such as oil & gas, NDT, nuclear medicine, and industrial radiography. With RadTool, ensure the highest safety standards by calculating radiation dose rates, determining safe distances from radioactive sources, and tracking your location in real time to ensure you remain outside the hazardous zone. Key Features: Safe Distance Calculator – Quickly compute safe distances based on source strength and exposure rate formulas. Dose Rate Estimator – Accurately estimate dose rates at various distances using the inverse square law. Real-Time Location Monitoring – Stay protected with GPS-based alerts when nearing the edge of the calculated safety perimeter. Radiation Source Database – Easy selection of common isotopes in a visual periodic-table-style layout. Custom Safety Zones – Define Controlled, Supervised, and Public Areas for regulatory compliance. User-Friendly Interface – Intuitive and professional UI designed for field usability. Works Offline – Access critical functions even in remote or shielded areas. Whether you're planning a radiographic test, securing a controlled area, or just ensuring occupational radiation safety, RadTool helps you make fast, accurate, and compliant decisionsβ€”on-site and in real time. Stay Safe. Stay Informed. Use RadTool.

Screenshots

Decay Lab4 screens
RadTool4 screens

Verdict

The call

The clearest difference is iOS requirement: RadTool at 12.0 against Decay Lab's 17.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Scorecard1 real difference Β· 5 level
Decay Lab versus RadTool: the parameters behind the verdict, then further details
ParameterDecay LabRadTool
PriceFreeFree
Update frequencyEvery 4 daysβ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS17.012.0 β€” better
Further details β€” not scored
Size6 MB39 MB
Age rating4+4+
DeveloperCarlos UribeGAMAL ABDELNASER GABR GABR

In-app purchases

None

Decay Lab

No in-app purchases

None

RadTool

No in-app purchases

Questions

Is Decay Lab free?
Decay Lab is free to download, with no in-app purchases.
Is RadTool free?
RadTool is free to download, with no in-app purchases.
Do Decay Lab or RadTool have ads?
Neither Decay Lab nor RadTool shows ads.

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