# Radioactive Decay Simulator vs Exponential Growth Calculator

The clearest difference is rating: Exponential Growth Calculator at 5.0 against Radioactive Decay Simulator's 4.0. Exponential Growth Calculator also leads on update cadence (fortnightly vs every 17 months). Radioactive Decay Simulator's advantage is in-app purchases (none vs 8) and iOS requirement (9.3 vs 15.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Exponential Growth Calculator sells 8 one-off in-app purchases. Radioactive Decay Simulator asks for nothing beyond the download.

Exponential Growth Calculator holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

Radioactive Decay Simulator ships an update every 17 months, Exponential Growth Calculator fortnightly. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Radioactive Decay Simulator | Exponential Growth Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/radioactive-decay-simulator/id959357000/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/exponential-growth-calculator/id1662901079/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 17 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 20 MB | 180 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Alistair Shaw](https://appshunter.io/developer/959356999) | [Glindemann, Sennoun, Langer GbR](https://appshunter.io/developer/1024972809) |

## What reviewers say

### Radioactive Decay Simulator

[App page](https://appshunter.io/ios/app/radioactive-decay-simulator/id959357000)

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.

**Highlights:** Emulates radioactive decay, Select preset or custom atoms, Adjust atom count, Real-time decay graphs, Adjustable simulation speed

**Features:** macOS Compatibility

**In-app purchases:** none


### Exponential Growth Calculator

[App page](https://appshunter.io/ios/app/exponential-growth-calculator/id1662901079)

Instantly solve math problems and prepare for exams with step-by-step solutions. Visualize your function's development graphically by entering initial values, growth rates, or time. Access curated learning videos and manage your solutions.

**Highlights:** Instant step-by-step solutions, Graphical function development, Curated learning videos, Input feedback, Solution management, Anonymized data collection

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| +30 User Tokens | $0.29 | one-time |
| +1 Convenience Token / 6h, max. +2 | $0.59 | one-time |
| +2 Convenience Tokens / 6h, max. +4 | $0.99 | one-time |
| +150 User Tokens | $0.99 | one-time |
| +300 User Tokens | $1.49 | one-time |
| +4 Convenience Tokens / 6h, max. +8 | $1.59 | one-time |
| Remove Ads | $1.99 | one-time |
| Lifetime Access | $1.99 | one-time |


## Frequently asked questions

### Is Radioactive Decay Simulator free?

Radioactive Decay Simulator is free to download, with no in-app purchases.

### Is Exponential Growth Calculator free?

Exponential Growth Calculator is free to download, with in-app purchases available.

### Which has better reviews, Radioactive Decay Simulator or Exponential Growth Calculator?

Exponential Growth Calculator is rated higher. Radioactive Decay Simulator averages 4.0 out of 5 from 1 ratings, while Exponential Growth Calculator averages 5.0 from 2 ratings.

### Do Radioactive Decay Simulator or Exponential Growth Calculator have ads?

Neither Radioactive Decay Simulator nor Exponential Growth Calculator shows ads.

### Which is updated more often, Radioactive Decay Simulator or Exponential Growth Calculator?

Radioactive Decay Simulator ships an update every 17 months, and Exponential Growth Calculator fortnightly. Most recently, Radioactive Decay Simulator was updated on October 13, 2026 and Exponential Growth Calculator on October 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*