# Underground vs Downfall Survival Sim

The clearest difference is price: Downfall Survival Sim at Free against Underground's $0.29. Downfall Survival Sim also leads on iOS requirement (15.0 vs 17.6). Underground's advantage is update cadence (every 2 days vs weekly) and chart position (#169 vs unranked). On rating, ratings volume, ads and in-app purchases there is nothing between them.

Downfall Survival Sim is free to download; Underground costs $0.29 up front. Underground sells 5 one-off in-app purchases and Downfall Survival Sim sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for Underground against 5.0 for Downfall Survival Sim. Both are backed by a comparable volume of ratings — 7 and 3 respectively.

Underground ships an update every 2 days, Downfall Survival Sim weekly. Both last shipped on November 10, 2026.

## The numbers

| Metric | Underground | Downfall Survival Sim |
| --- | --- | --- |
| Price | $0.29 | **Free** |
| Rating | [5.0 (7 ratings)](https://appshunter.io/ios/app/underground-bunker-survival/id6778126949/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/downfall-survival-sim/id6790890356/reviews) |
| Number of ratings | **7** | 3 |
| Positive reviews | 71.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#169** | — |
| Size | 36 MB | 40 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 9+ |
| Developer | [Sunspear Software LLC](https://appshunter.io/developer/1478643604) | [Constantin Catalin Stroescu](https://appshunter.io/developer/1896112005) |

## What reviewers say

### Underground

[App page](https://appshunter.io/ios/app/underground-bunker-survival/id6778126949)

**Currently charting:** #169 Top Paid · Strategy (US App Store)

Manage a post-apocalyptic bunker, balancing resources and survivor needs. Build diverse compartments, handle incidents, and make critical decisions about who to let in. Explore tunnels, trade, and fight threats to ensure your community's survival.

**Highlights:** Bunker compartment building, Resource management (power, water, food), Survivor management (skills, health, stress), Incident resolution, Metro exploration and combat, Multiplayer trading and bonuses, Mini-games for resources

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Parts Crate (Small) | $0.99 | one-time |
| Parts Crate (Medium) | $1.99 | one-time |
| Supply Crate (Mixed) | $1.99 | one-time |
| Support the Shelter | $2.99 | one-time |
| Parts Crate (Large) | $3.99 | one-time |


### 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 external threats and internal morale.

**Highlights:** Bunker settlement management, Resource rationing and balancing, Survivor recruitment and leveling, Wasteland exploration and scavenging, Research and technology tree, Base defense against threats, Optional permadeath mode

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Underground free?

Underground costs $0.29, and also offers in-app purchases.

### Is Downfall Survival Sim free?

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

### Which has better reviews, Underground or Downfall Survival Sim?

Underground and Downfall Survival Sim are both rated 5.0 out of 5 on the App Store, from 7 and 3 ratings respectively.

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

Neither Underground nor Downfall Survival Sim shows ads.

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

Underground ships an update every 2 days, and Downfall Survival Sim weekly. Most recently, Underground was updated on November 10, 2026 and Downfall Survival Sim on November 10, 2026.

---

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