TrueFish vs UBOOTSIM
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
TrueFish
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.
- Fish in rivers, lakes, and seas
- 129 different fish species
- Realistic fishing mechanics
- Location-based fishing
- Weather condition influence
- Bait and equipment customization
Read full descriptionHide full description
TrueFish is a fishing simulator. You can fish with a fishing rod along rivers, lakes and seas of Italian territory. You can catch the most common fishes in Italian territory: bleaks, trouts, chub, carp, mullet, etc.. for a total of 129 different types! According to the place, the day of the year, weather conditions and especially the type of fishing rod, the fishing line calibration, the bait, etc., you will catch fishes just like in real life!
UBOOTSIM
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.
- 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
Read full descriptionHide full description
November 1941. The Strait of Gibraltar. You command a Type VIIC U-boat: 67 metres of steel, four bow tubes and one at the stern. On the horizon, smoke from a convoy: five freighters and a tanker, guarded by a destroyer and two corvettes. Your mission: sink as much tonnage as you can and make it home alive. UBOOTSIM is a World War II submarine simulator made to be enjoyed at your own pace. Every attack is a small game of chess between you, the convoy and its escorts. HUNT - Attack periscope and bridge binoculars, with 1.5× to 6× zoom, a bearing scale and an automatic 360° sweep. - A living daylight sea: swell, whitecaps, clouds, sun glitter and funnel smoke that gives the convoy away long before its hulls. - Hydrophone to hear propellers while submerged: slow, heavy merchants and fast escorts. An audible alarm sounds for every new contact. - Tactical chart of the Strait with its coastline, grid, bearing ring, contacts and wakes. Tap a point and the helm and periscope turn towards it. STRIKE - Lock the target, take bearing and range marks and let the Torpedo Data Computer (TDC) find the solution. When the button turns green: fire! - Fine-tune the target's range, course and speed by hand, or switch on the automatic TDC for a more relaxed game. - Spreads of 1, 2 or 4 torpedoes, a stern tube and real-time reloading, one tube at a time. - Follow every torpedo with its wake, its countdown and a tracking window that zooms in for the last seconds. And, just as in 1941, some pistols fail. - On the surface, the 8.8 cm deck gun: tap the ship, wait for the green ring and fire. The crew corrects their aim with every hit. SURVIVE - After the first hit the convoy raises the alarm, turns and speeds up, and the escorts come after you with ASDIC and depth charges. - Go below the thermal layer, run silent, change course after every pass and keep an eye on your hull and battery. - Underwater side view: your U-boat angled as it dives, enemy hulls above you with the metres beneath their keels, and depth charges falling and bursting all around. - While you run on the surface a patrol aircraft may appear. If it spots you, it attacks and radios the destroyer. Dive in time… or shoot it down with the deck gun. A SUBMARINE YOU CAN FEEL - Diving depends on your speed: at full ahead the boat dips its bow and goes down at an angle; stopped, it barely sinks. - Alarm bell and the call of "Dive! Dive!" as you submerge, and "Surface! Surface!" as you come up. - Diesels rumbling on the surface and electric motors humming underwater, higher-pitched the faster you go. - The blast of compressed air at launch, the whistle of running torpedoes, explosions, ASDIC pings against the hull and depth charges that grow louder the closer they burst. SHIPS WITH CHARACTER - Freighters from different shipping lines, with coloured funnels, lifeboats and cargo derricks. - A long, low tanker: the big prize. - A fast, camouflaged destroyer with four guns, and two corvettes that never stop circling the convoy. - The more you zoom, the more you see: windows, flags, pennant numbers on the bow and fires when you hit them. FOR EVERY COMMANDER - Time compression from 1× to 32×, dropping back to 1× automatically at any danger. - "Show all ships" mode to learn the game. - Built-in quick guide in English and Spanish. - Scalable display: stretched to fill the window or proportional, as you prefer. - For iPhone, iPad and Mac, with a native Mac version and keyboard controls. Ship names are fictional. UBOOTSIM is a game: it simplifies reality to make it playable, while staying true to how war at sea was fought in 1941. Good hunting, Commander!
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | TrueFish | UBOOTSIM |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 months | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 12.1 — better | 17.0 |
| Further details — not scored | ||
| Size | 232 MB | 12 MB |
| Age rating | 4+ | 12+ |
| Developer | Ivan Tibaldi | Pablo Kessler Saiz |
Customer experience
TrueFish
UBOOTSIM
In-app purchases
TrueFish
No in-app purchases
UBOOTSIM
No in-app purchases









