o-o-O! app icon

Apps Like o-o-O! for iPhone and iPad

Combine atoms to create elements

Manage atomic synthesis by combining atoms to create elements and generate energy. Conduct experiments to discover new synthesis formulas and unlock scientific advancements. Track progress and adjust reactions for optimal results.

by Iouri Korotkikh★ 3.01 ratingsGamesFreeData updated 2026-09-06

o-o-O! screenshots

Ranked alternatives

Showing 1–20 of 1,000 ranked alternatives.

  1. Idle Atom inc. - element merge app icon

    Idle Atom inc. - element merge

    Arsen Asoian

    Atoms, create energy, advance elements

    Create and combine Hydrogen atoms to generate energy. identical atoms to progress through the periodic table and gain information by double-tapping. Accumulate energy to upgrade the lab and unlock new technologies.

    ★ 4.7313 ratingsGamesFreeData updated 2026-09-06
  2. Explayn: Learn Chemistry app icon

    Explayn: Learn Chemistry

    Francois Lagunas

    Build molecules, observe reactions, explore atoms

    Explore chemical concepts through interactive experiments and real-life examples. Build molecules, observe atomic vibrations, and conduct virtual labs. Track progress with visual explanations and guided exercises.

    ★ 4.26 ratingsEducationFreeData updated 2026-09-06
  1. Fish Go.io - Be the fish king app icon

    Fish Go.io - Be the fish king

    Whitedot International Group Limited

    Rule the seas with your fleet

    Play a -themed strategy game where players collect homeless , swallow opponents' teams, and grow their school to dominate the underwater kingdom.

    ★ 4.716,285 ratingsGamesFreeData updated 2026-09-06
  2. Marvel Contest of Champions app icon

    Marvel Contest of Champions

    Kabam Games, Inc.

    Summon heroes, battle villains, conquer challenges

    Fight against heroes and villains in turn-based battles. Choose characters like Spider-Man, Iron Man, and Deadpool. Build a team, customize abilities, and engage in epic showdowns.

    ★ 4.7713,813 ratingsGamesFreeData updated 2026-09-09
  3. Atomas app icon

    Atomas

    Max Gittel

    Fuse atoms, build elements, play

    Create and fuse atoms to form valuable elements like gold and platinum. Start with hydrogen and use plus atoms to combine elements. Track progress and manage element creation through intuitive touch controls.

    ★ 4.83,391 ratingsGamesFreeData updated 2026-09-09
  4. Air Rifle 3D: Rat Sniper app icon

    Air Rifle 3D: Rat Sniper

    TapNation

    Snipe rats in immersive 3D world

    Play as a in a dystopian world overrun by mutant rats. Aim and shoot at targets in 3D environments. Upgrade weapons and gear. Complete missions to progress through the story. Track achievements and unlock new content.

    ★ 4.235,980 ratingsGamesFreeData updated 2026-09-06
  5. U.S. Army STARS Elements app icon

    U.S. Army STARS Elements

    Army Game Studio

    Build atoms, play games, explore the periodic

    Build and manipulate atoms by adding or removing protons, neutrons, and electrons. Explore chemical bonds through interactive games. Navigate the periodic table to learn element properties. Test knowledge with quizzes and challenges.

    ★ 4.619 ratingsEducationFreeData updated 2026-09-06
  6. Melon: Sandbox app icon

    Melon: Sandbox

    Payge Limited

    Build, destroy, and experiment with physics

    Lets users throw and smash objects with realistic ragdoll physics. They can use firearms, melee weapons, explosives, and vehicles to interact with environments. Players can create chaos by stabbing, crushing, burning, or vaporizing ragdolls.

    ★ 4.5116,141 ratingsGamesFreeData updated 2026-09-06
  7. Klondike Adventures: Farm Game app icon

    Klondike Adventures: Farm Game

    VIZOR APPS LTD

    Explore maps, build settlements, uncover secrets

    Build and manage a with tasks, houses, and factories. Grow crops and raise livestock. Complete quests and explore Gold Rush-era locations. Customize the environment and progress through story-driven missions.

    ★ 4.7127,305 ratingsGamesFreeData updated 2026-09-06
  8. Heart Box - logic physics game app icon

    Heart Box - logic physics game

    Konstantin Radchenko

    Solve puzzles to recharge the robot

    Navigate through puzzle rooms to recharge Robby. Solve over 180 levels with realistic . Choose from 4 modes and 20 objects. Edit levels and share via QR codes. Customize robot appearance with skins. Access community-created levels online.

    ★ 4.6197 ratingsGamesFreeData updated 2026-09-06

How we rank alternatives

Apps are ranked by functional similarity, category fit, rating confidence, and popularity.