Sentry vs RadTool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sentry
Enhances situational awareness for law enforcement and first responders involved in alarm monitoring strategies. It supports partnerships with government and businesses to protect strategic assets globally.
- Elevates situational awareness
- Supports alarm monitoring strategies
- Partners with government and first responders
- Protects strategic assets globally
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Sentry-SECURE elevates situational awareness amongst law enforcement stakeholders that are critical to the alarm monitoring strategies being implemented by the Office of Radiological Security’s Protect strategy. The Office of Radiological Security uses these strategies to partner with government, first responders, and businesses to protect strategic assets around the world.
RadTool
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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 decisions—on-site and in real time. Stay Safe. Stay Informed. Use RadTool.
Screenshots
Verdict
The clearest difference is iOS requirement: RadTool at 12.0 against Sentry's 16.6. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Sentry | RadTool |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (6 ratings) — better | — |
| Number of ratings | 6 — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 56 MB | 39 MB |
| Age rating | 4+ | 4+ |
| Developer | VPI Engineering | GAMAL ABDELNASER GABR GABR |
In-app purchases
Sentry
No in-app purchases
RadTool
No in-app purchases









