# Castle Rivals vs UBoat Commander

The clearest difference is rating: Castle Rivals at 4.5 against UBoat Commander's 3.3. Castle Rivals also leads on ratings volume (1.8K vs 3) and monetization model (ad-supported vs free with in-app purchases). UBoat Commander's advantage is update cadence (every 4 days vs every 9 days) and review sentiment (50% vs 40%). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Castle Rivals sells 14 one-off in-app purchases and UBoat Commander sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Castle Rivals holds the better App Store score, 4.5 against 3.3. That said, the two scores are not equally well evidenced: Castle Rivals has 1.8K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 40% of Castle Rivals's written reviews are positive against 50% of UBoat Commander's, so the app with the better star average is not the one people write more warmly about.

Castle Rivals ships an update every 9 days, UBoat Commander every 4 days. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Castle Rivals | UBoat Commander |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (1.8K ratings)](https://appshunter.io/ios/app/castle-rivals/id6758003347/reviews)** | [3.3 (3 ratings)](https://appshunter.io/ios/app/uboat-commander/id6760224570/reviews) |
| Number of ratings | **1.8K** | 3 |
| Positive reviews | 39.6% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 9 days | **Every 4 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 512 MB | 406 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [Voodoo](https://appshunter.io/developer/714804730) | [Ivan Trafimovich](https://appshunter.io/developer/1601984095) |

## What reviewers say

### Castle Rivals

[App page](https://appshunter.io/ios/app/castle-rivals/id6758003347)

Engage in fast-paced PvP battles by building defenses and firing cannons to destroy enemy castles. Utilize physics-based destruction and strategic hero abilities to outmaneuver opponents. Every shot counts in this skill-based combat game.

**Highlights:** Physics-based destruction, Skill-based cannon combat, Unique heroes with special abilities, Strategic gameplay, Upgradeable castles, Epic castle battles

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

**In-app purchases (14)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starter Pack | $1.99 | one-time |
| Hero Boost | $3.99 | one-time |
| Small Gem Package | $4.99 | one-time |
| Champion Pack | $4.99 | one-time |
| Elite Pack | $7.99 | one-time |
| Medium Gem Package | $9.99 | one-time |
| Arena Pack | $9.99 | one-time |
| Moon Maiden Offer | $9.99 | one-time |
| Battle Pass | $9.99 | one-time |
| No Ads Temporary | $9.99 | one-time |
| Vampire Hunter Offer | $9.99 | one-time |
| Forge Pass | $14.99 | one-time |
| Large Gem Package | $19.99 | one-time |
| Huge Wildcard Package | $49.99 | one-time |


### UBoat Commander

[App page](https://appshunter.io/ios/app/uboat-commander/id6760224570)

Command a World War II submarine, navigating the ocean depths to hunt enemy ships and convoys. Strategize your attacks with torpedoes and stealth, then upgrade your vessel for enhanced speed, armor, and weaponry to survive intense naval battles.

**Highlights:** Command a WW2 submarine, Hunt enemy ships and convoys, Navigate surface and underwater, Upgrade submarine speed, armor, stealth, Unlock new weapons and abilities, Complete diverse missions

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No ads package | $2.99 | one-time |
| VIP USS Gato submarine package | $12.99 | one-time |


## Frequently asked questions

### Is Castle Rivals free?

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

### Is UBoat Commander free?

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

### Which has better reviews, Castle Rivals or UBoat Commander?

Castle Rivals is rated higher. Castle Rivals averages 4.5 out of 5 from 1.8K ratings, while UBoat Commander averages 3.3 from 3 ratings.

### Do Castle Rivals or UBoat Commander have ads?

Both Castle Rivals and UBoat Commander show ads.

### Which is updated more often, Castle Rivals or UBoat Commander?

Castle Rivals ships an update every 9 days, and UBoat Commander every 4 days. Most recently, Castle Rivals was updated on October 31, 2026 and UBoat Commander on October 24, 2026.

---

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