# TrueFish vs UBOOTSIM

The clearest difference is price: UBOOTSIM at Free against TrueFish's $1.99. UBOOTSIM also leads on update cadence (every 4 days vs every 3 months). TrueFish's advantage is iOS requirement (12.1 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

UBOOTSIM is free to download; TrueFish costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

TrueFish ships an update every 3 months, UBOOTSIM every 4 days. The most recent releases landed on October 17, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | TrueFish | UBOOTSIM |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ubootsim/id6818294804/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 days** |
| Monetization | Paid | **Free** |
| Size | 232 MB | 12 MB |
| Requires iOS | **12.1** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 12+ |
| Developer | [Ivan Tibaldi](https://appshunter.io/developer/1471780691) | [Pablo Kessler Saiz](https://appshunter.io/developer/1818393128) |

## What reviewers say

### TrueFish

[App page](https://appshunter.io/ios/app/truefish/id1474846249)

Experience realistic fishing across Italian waters. Catch a variety of fish species using different rods, lines, and baits, with gameplay influenced by location, time, and weather.

**Highlights:** Fish in rivers, lakes, and seas, 129 different fish species, Realistic fishing mechanics, Location-based fishing, Weather condition influence, Bait and equipment customization

**Features:** macOS Compatibility

**In-app purchases:** none


### UBOOTSIM

[App page](https://appshunter.io/ios/app/ubootsim/id6818294804)

Command a World War II submarine in the Strait of Gibraltar. Hunt, strike, and survive enemy convoys and escorts using realistic periscopes, torpedo computers, and deck guns. Experience the sounds and sensations of underwater combat.

**Highlights:** Realistic periscope and binoculars with zoom, Hydrophone for detecting enemy propellers, Tactical chart for navigation and target tracking, Torpedo Data Computer (TDC) for accurate firing solutions, Deck gun for surface combat, Stealth mechanics to evade escorts, Immersive sound design and U-boat sensations

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TrueFish free?

TrueFish costs $1.99, with no in-app purchases.

### Is UBOOTSIM free?

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

### Do TrueFish or UBOOTSIM have ads?

Neither TrueFish nor UBOOTSIM shows ads.

### Which is updated more often, TrueFish or UBOOTSIM?

TrueFish ships an update every 3 months, and UBOOTSIM every 4 days. Most recently, TrueFish was updated on October 17, 2026 and UBOOTSIM on October 26, 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.*