# Groundfall vs Slash

The clearest difference is rating: Slash at 3.7 against Groundfall's 3.0. Slash also leads on in-app purchases (none vs 1) and update cadence (every 8 days vs every 2 months). Groundfall's advantage is iOS requirement (15.1 vs 18.0). On price, ads and device support there is nothing between them.

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

Slash holds the better App Store score, 3.7 against 3.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Groundfall ships an update every 2 months, Slash every 8 days. The most recent releases landed on September 12, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Groundfall | Slash |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/groundfall/id6761408997/reviews) | **[3.7 (3 ratings)](https://appshunter.io/ios/app/slash-subnet-calculator/id6764183064/reviews)** |
| Number of ratings | 1 | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 8 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 59 MB | 1 MB |
| Requires iOS | **15.1** | 18.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Kodjovi Mlapa](https://appshunter.io/developer/1884325240) | [Tyler Dix](https://appshunter.io/developer/877363265) |

## 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 |


### Slash

[App page](https://appshunter.io/ios/app/slash-subnet-calculator/id6764183064)

This offline calculator quickly determines IP network details like network address, host ranges, and broadcast addresses. It supports various input formats and provides advanced information, including binary views and IPv6 compatibility. Designed for network professionals and students, it offers a streamlined way to perform subnet calculations without an internet connection.

**Highlights:** Offline subnet calculation, Supports CIDR, bare address, or subnet mask input, Calculates network, host, and broadcast addresses, Pastes directly from network device output, Provides wildcard mask and binary views, Handles /31 and /32 subnetting, IPv6 support

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Groundfall free?

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

### Is Slash free?

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

### Which has better reviews, Groundfall or Slash?

Slash is rated higher. Groundfall averages 3.0 out of 5 from 1 ratings, while Slash averages 3.7 from 3 ratings.

### Do Groundfall or Slash have ads?

Neither Groundfall nor Slash shows ads.

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

Groundfall ships an update every 2 months, and Slash every 8 days. Most recently, Groundfall was updated on September 12, 2026 and Slash on October 14, 2026.

---

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