Radioactive Decay Simulator vs Rad Onc Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Radioactive Decay Simulator
This educational tool simulates radioactive decay for a group of atoms. Users can choose preset atoms or input custom half-lives to observe decay in real-time graphs. The simulator allows for adjustments in atom count and speed for efficient analysis.
- Emulates radioactive decay
- Select preset or custom atoms
- Adjust atom count
- Real-time decay graphs
- Adjustable simulation speed
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The Radioactive Decay Simulator emulates the radioactive decay of a group of like atoms. Users are able to select from a range of preset atoms, or enter the half-life of a specific atom that they wish to simulate. By adjusting the number of atoms, users are able to determine how even with a large number of atoms, the randomness of radioactive decay can be modeled. Users are able to observe the both number of decayed atoms as well as the number of non-decayed atoms remaining in a real time graph. The simulator can be sped up to allow atoms with a longer half-life to be analyzed quickly.
Rad Onc Calc
A radiation oncology calculator and reference tool for medical professionals. It provides quick access to essential calculations and treatment constraints.
- Radiation oncology calculations
- Treatment constraints reference
- Quick access to essential data
- Comprehensive tool for professionals
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Comprehensive RadOnc calculator and constraints reference for radiation oncologists.
Screenshots
Verdict
The clearest difference is rating: Rad Onc Calc at 4.6 against Radioactive Decay Simulator's 4.0. Rad Onc Calc also leads on update cadence (every 6 weeks vs every 17 months) and ratings volume (12 vs 1). Radioactive Decay Simulator's advantage is iOS requirement (9.3 vs 14.0). On price, ads, in-app purchases and monetization model 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.
Rad Onc Calc holds the better App Store score, 4.6 against 4.0. That said, the two scores are not equally well evidenced: Rad Onc Calc has 12 ratings behind it against 1, so its average is the more settled of the two.
Radioactive Decay Simulator ships an update every 17 months, Rad Onc Calc every 6 weeks. The most recent releases landed on June 5, 2026 and June 1, 2026 respectively.
| Parameter | Radioactive Decay Simulator | Rad Onc Calc |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 4.6 (12 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 12 — better |
| Update frequency | Every 17 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 9.3 — better | 14.0 |
| Further details — not scored | ||
| Size | 20 MB | 57 MB |
| Age rating | 4+ | 12+ |
| Developer | Alistair Shaw | Red Canvas LLC |
Customer experience
Radioactive Decay Simulator
Rad Onc Calc
In-app purchases
Radioactive Decay Simulator
No in-app purchases
Rad Onc Calc
No in-app purchases
Questions
Is Radioactive Decay Simulator free?
Is Rad Onc Calc free?
Which has better reviews, Radioactive Decay Simulator or Rad Onc Calc?
Do Radioactive Decay Simulator or Rad Onc Calc have ads?
Which is updated more often, Radioactive Decay Simulator or Rad Onc Calc?
Other comparisons
