OZO vs Metro Sort
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
OZO
Defend the ocean from a zombie invasion by assembling a team of diverse sea creatures. Strategize your defenses, unlock unique abilities, and upgrade your units through challenging missions and daily challenges.
- Diverse sea creature units with unique abilities
- Challenging missions across various levels
- High-quality underwater graphics and animations
- Customizable upgrades for units
- Daily challenges and rewards
- Strategic defense gameplay
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Dive into epic battle with "Ocean Zombie Outbreak". The once peaceful marine world is now under attack by terrifying zombies! Join forces with an incredible array of sea creatures and protect your underwater home from the zombie invasion. You and your underwater army are the last line of defense preventing complete devastation, as zombies have already taken over the land with their undead forces. Prepare yourself for an underwater adventure like no other! In Ocean Zombie Outbreak, the fate of the ocean lies in your hands. Assemble your team of brave sea creatures and defend your aquatic home against relentless waves of zombie invaders. Diverse Sea Creatures: Unlock and command a variety of sea creatures, each with unique abilities. From the humble fish to mighty sharks, create your ultimate defense team. Challenging Missions: Battle through countless levels and astonishing backdrops. With every passing level you will fight new and tougher zombie threats. To counter the advanced attacks, strategize your defenses and effectively utilise your abilities. Breath-taking Graphics: Experience a stunning underwater world with high-quality graphics and animations that bring your ocean adventures to life. As you navigate through the levels of the game, you will descend into the depths of underwater world filled with wonder. Customizable Upgrades: Power up your sea creatures with customizable upgrades to enhance their abilities and ensure victory against horde of different kinds of zombie. Daily Challenges and Rewards: Complete daily challenges to earn special rewards and participate in unique events for exclusive bonuses. JOIN THE DEFENSE: The ocean needs a hero! Lead your team of sea creatures against the relentless zombie outbreak. Strategize, defend, and reclaim the deep blue in this thrilling battle for survival.
Metro Sort
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All aboard for the ultimate train puzzle adventure! Welcome to Train Sort, the addictive hybrid casual puzzle game where your mission is to guide trains, sort passengers by color, and clear the tracks without a crash. Test your strategy, timing, and puzzle-solving skills as you navigate through stations, tunnels, and tricky layouts. How to Play: • Tap a train to select it, then tap a station to move. • Watch as passengers matching the train’s color board automatically. • Offload passengers that don’t match into available station slots. • Fill your train with only matching passengers, then send it to the exit. • Avoid collisions and complete your mission before running out of moves! Key Features: • Strategic Gameplay – Plan your moves, choose the right paths, and manage limited moves. • Challenging Levels – From simple layouts to complex multi-track puzzles. • Special Tracks & Obstacles – Locked tracks, blocker trains, hidden passengers, and color-only rails keep the challenge fresh. • Power-Ups to Help You Win: • Extra Moves – Keep your journey going. • Swap Train – Instantly move a train to another station. • Magic Wand – Fill your train instantly with matching passengers. • Replay Anytime – Master levels to earn more coins and beat your own scores. Tips for Success: • Always look for the shortest safe route. • Unlock blocked tracks by collecting the right passenger. • Use tunnels wisely to get new passengers when stations have space. • Save your power-ups for tough moments. Rewards & Economy: Earn coins by winning levels. Spend coins on power-ups or to continue after a fail. Watch ads for bonus rewards and extra moves. Immersive Train World: Enjoy a vibrant top-down 3D art style with detailed trains, lively stations, and colorful passengers. Whether you’re a casual gamer or a puzzle master, Train Sort offers hours of engaging gameplay that’s easy to pick up but challenging to master. Why You’ll Love Train Sort: Simple tap controls, deep strategy. Fun for all ages – no internet required to play. Hundreds of unique puzzles to solve. A relaxing yet brain-teasing train experience. Are you ready to become the ultimate train master? Download Train Sort now and start sorting your way to victory!
Screenshots
Verdict
The clearest difference is in-app purchases: Metro Sort at none against OZO's 10. Metro Sort also leads on update cadence (weekly vs fortnightly). OZO's advantage is iOS requirement (13.0 vs 15.0). On price, ads 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
Both are free to download. OZO sells 10 one-off in-app purchases. Metro Sort asks for nothing beyond the download.
OZO ships an update fortnightly, Metro Sort weekly. The most recent releases landed on November 4, 2026 and October 30, 2026 respectively.
| Parameter | OZO | Metro Sort |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Fortnightly | Weekly — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 432 MB | 226 MB |
| Age rating | 9+ | 17+ |
| Developer | COCOBOO Games | TLC STUDIOS PRIVATE LIMITED |
In-app purchases
OZO
- Quick Boost$0.99
- Piggy Bank$0.99
- Remove Interrupted ads$0.99
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- Power Surge$1.49
- Action Vault$1.79
- Flash Forward$1.79
- Turbo Deal$2.09
- Infinity Bundle$2.59
- VIP Membership$4.99
- Mega Gem Pack$12.99
Metro Sort
No in-app purchases









