Comparison

Evolvace E3 vs Ocean Keeper

Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.

Head to head
About

Evolvace E3

Features
Read full description

EvolvaceE3s were finally completed.  Unleash the power as you like.  E1, E2, E3O, E3. All Evolvaces appear.  Decide the strongest.  You can customise E3Os.  All covered, Solo, Watch, Local multi-player, World multi-player.  In the multi-player, switch the navigator to human or computer at any time.  The best battleship fast on-line VS shooting.

About

Ocean Keeper

Explore procedurally generated underwater caves as a crashed miner in this roguelike shooter. Dig for resources, battle hordes of sea monsters, and upgrade your mech and weapons to survive. Each playthrough offers a unique challenge with changing layouts and diverse bosses.

Highlights
  • Procedurally generated caves
  • Mech customization
  • Horde battles with monsters and bosses
  • Meta-progression system
  • Artifact system
  • Multiple weapon choices
  • Diverse biomes
Features
Read full description

A roguelike shooter with a top-down view where you play as a Miner whose spaceship has crashed on a planet, filled with underwater monsters! Use the time between each attack to power up your diver, mech, or weapon. Build automatic turrets, use drones to gather resources and improve your skills to increase your chances of survival. Discover mysterious locations and fantastic undersea deep biomes. EACH time you explore the underwater worlds, the layout changes, making every journey unique. You never play the same scenario twice in this drill dungeon core roguelite. Ocean Keeper: Dome Survival Features: * Procedurally generated caves: each dungeon you enter is unique. * Mech customization: Upgrade and personalize your Submarine Mech. * Underwater casual game with roguelite and roguelike elements. * Horde Battles: Fight waves of sea monsters and bosses. * Meta-progression: Constant upgrades and new abilities for your survivor. * Artifact System: Unlock and equip powerful artifacts. * Multiple Weapons: Choose from a huge arsenal of weapons. * Diverse Bosses: Slay unique and challenging alien bosses. * Multiple biomes: Explore different underwater dungeons. - How to Play Ocean Keeper: Dome Survival: Play with two hands and swipe your finger across the screen to move the diver in any direction, or use the virtual joystick. Find a mine (a deep hollow lighted in blue), dive into it and start digging to find resources. Since you don't have a backpack, you need to drag the resources yourself up to the mech. Get out of the mine as soon as you hear the sound of an attack or see the timer expire. Attack aliens by aiming at them and firing bullets. Collect various resources to unlock powerful upgrades: improve your weapons, increase the impact of your drill, boost your jetpack's max speed, and many other upgrade paths - each of which gives you and your dome the best chance of survival until dawn! - Join The Fans of Ocean Keeper: Dome Survival: Join our community and become an part of Ocean Keeper: Dome Survival development! In our Discord, you can chat directly with our developers, share your valuable feedback, and have a real impact on the final version of Ocean Keeper: Dome Survival roguelike game.

Screenshots

Evolvace E34 screens
Ocean Keeper4 screens

Verdict

The call

The clearest difference is price: Ocean Keeper at Free against Evolvace E3's $4.99. Ocean Keeper also leads on update cadence (every 4 days vs every 10 months) and iOS requirement (12.0 vs 15.6). Evolvace E3's advantage is ads (none vs shown). On 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

CostPrice · In-app purchases · Ads · Monetization

Ocean Keeper is free to download; Evolvace E3 costs $4.99 up front. Evolvace E3 sells 1 one-off in-app purchase and Ocean Keeper sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Evolvace E3 ships an update every 10 months, Ocean Keeper every 4 days. Both last shipped on October 30, 2026.

Scorecard4 real differences · 6 level
Evolvace E3 versus Ocean Keeper: the parameters behind the verdict, then further details
ParameterEvolvace E3Ocean Keeper
Price$4.99Free — better
Rating—4.4 (291 ratings) — better
Positive reviews—48.0% of reviews
Number of ratings—291 — better
Update frequencyEvery 10 monthsEvery 4 days — better
AdsNo — betterYes
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.612.0 — better
Further details — not scored
Size81 MB272 MB
Age rating4+9+
DeveloperTetsuyoshi MorikawaRetroStyle Games

Bugs and requests

Evolvace E3

Not enough reviews yet to summarise bugs or requests.

Ocean Keeper

Reported bugs

3 issues
  • Game not loading after purchase
  • Upgrade options not functioning as expected
  • Progress not saving across sessions

Requested features

4 requests
  • More items and upgrades to prolong engagement
  • Ability to restore purchases and continue progress
  • Improved UI scaling and readability on mobile
  • Expanded gameplay modes and story elements

In-app purchases

1 purchases

Evolvace E3

One-time1
  • Addition$0.99
4 purchases

Ocean Keeper

One-time4
  • Full Game Unlock$2.99
  • Heap of meta currency$2.99
  • Chest of meta currency$4.99
Show 1 more
  • Crate of meta currency$9.99

Questions

Is Evolvace E3 free?
Evolvace E3 costs $4.99, and also offers in-app purchases.
Is Ocean Keeper free?
Ocean Keeper is free to download, with in-app purchases available.
Do Evolvace E3 or Ocean Keeper have ads?
Ocean Keeper shows ads; Evolvace E3 does not.
Which is updated more often, Evolvace E3 or Ocean Keeper?
Evolvace E3 ships an update every 10 months, and Ocean Keeper every 4 days. Most recently, Evolvace E3 was updated on October 30, 2026 and Ocean Keeper on October 30, 2026.

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