# Subterranean vs Downfall Survival Sim

The clearest difference is in-app purchases: Subterranean at none against Downfall Survival Sim's 1. Subterranean also leads on update cadence (every 2 days vs every 6 days) and iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. Downfall Survival Sim sells 1 one-off in-app purchase. Subterranean asks for nothing beyond the download.

Subterranean ships an update every 2 days, Downfall Survival Sim every 6 days. The most recent releases landed on October 13, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Subterranean | Downfall Survival Sim |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/downfall-survival-sim/id6790890356/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 6 days |
| Monetization | — | Free with in-app purchases |
| Size | 142 MB | 40 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 9+ |
| Developer | [Tayin Wallace](https://appshunter.io/developer/1658923996) | [Constantin Catalin Stroescu](https://appshunter.io/developer/1896112005) |

## What reviewers say

### Subterranean

[App page](https://appshunter.io/ios/app/subterranean/id6754824884)

**In-app purchases:** none


### Downfall Survival Sim

[App page](https://appshunter.io/ios/app/downfall-survival-sim/id6790890356)

Lead a group of survivors in a post-apocalyptic wasteland. Manage resources, recruit specialists, and explore dangerous territories to rebuild civilization. Make critical decisions to ensure your settlement's survival against threats.

**Highlights:** Manage resources (food, water, power), Upgrade bunker modules, Recruit and level up survivors, Explore irradiated regions, Research technology, Defend against mutants and raiders, Optional permadeath

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Survivor Mode | $9.99 | one-time |


## Frequently asked questions

### Is Subterranean free?

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

### Is Downfall Survival Sim free?

Downfall Survival Sim is free to download, with in-app purchases available.

### Do Subterranean or Downfall Survival Sim have ads?

Neither Subterranean nor Downfall Survival Sim shows ads.

### Which is updated more often, Subterranean or Downfall Survival Sim?

Subterranean ships an update every 2 days, and Downfall Survival Sim every 6 days. Most recently, Subterranean was updated on October 13, 2026 and Downfall Survival Sim on October 17, 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.*