# Groundfall vs SystemsTradingSimulator

The clearest difference is in-app purchases: SystemsTradingSimulator at none against Groundfall's 1. Groundfall's advantage is iOS requirement (15.1 vs 26.5). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Groundfall sells 1 one-off in-app purchase. SystemsTradingSimulator asks for nothing beyond the download.

Groundfall ships an update every 2 months, SystemsTradingSimulator every 5 weeks. The most recent releases landed on September 12, 2026 and September 27, 2026 respectively.

## The numbers

| Metric | Groundfall | SystemsTradingSimulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/groundfall/id6761408997/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 59 MB | 3 MB |
| Requires iOS | **15.1** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Kodjovi Mlapa](https://appshunter.io/developer/1884325240) | [JOSEPH JEFFERDS SINCLAIR](https://appshunter.io/developer/1895542716) |

## What reviewers say

### Groundfall

[App page](https://appshunter.io/ios/app/groundfall/id6761408997)

Explore the devastating effects of nuclear weapons with this educational simulator. Visualize blast zones, thermal radiation, and fallout patterns on any location. Learn about nuclear physics, history, and preparedness through clear simulations and real-world scenarios.

**Highlights:** Simulate nuclear weapon effects, Visualize blast, thermal, and fallout zones, Compare weapon yields, Analyze fallout direction, Estimate casualties and damage, Learn nuclear physics and history, Save and export simulation results

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Groundfall Full Access | $9.99 | one-time |


### SystemsTradingSimulator

[App page](https://appshunter.io/ios/app/systemstradingsimulator/id6764126224)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Groundfall free?

Groundfall is free to download, with in-app purchases available.

### Is SystemsTradingSimulator free?

SystemsTradingSimulator is free to download, with no in-app purchases.

### Do Groundfall or SystemsTradingSimulator have ads?

Neither Groundfall nor SystemsTradingSimulator shows ads.

### Which is updated more often, Groundfall or SystemsTradingSimulator?

Groundfall ships an update every 2 months, and SystemsTradingSimulator every 5 weeks. Most recently, Groundfall was updated on September 12, 2026 and SystemsTradingSimulator on September 27, 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.*