ProtoCradle
Cosmic Sandbox: Build Worlds
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Cosmic Sandbox: Build New Worlds
ProtoCradle is a real-time cosmic sandbox simulation where you create and evolve a living planet from a primitive asteroid. Explore the journey of a world through 11 spectacular celestial transformations, powered by dynamic physics and creative experimentation.
Forge Your World
Shape your planet by introducing different types of cosmic matter:
• Gas Meteors expand the atmosphere and influence planetary growth
• Molten Meteors increase surface temperature and volcanic activity
• Ice Comets cool the planet and form frozen environments
• Iron Asteroids build a dense planetary core
• Cosmic Energy Objects create powerful celestial reactions
Every interaction is driven by simulated physics, with mass, temperature, composition, and gravity working together to create unique planetary outcomes.
Unlock 11 Celestial Stages
Watch your creation transform through different cosmic forms:
→ Proto-Core Asteroid
→ Rocky Planet
→ Ocean World
→ Volcanic Planet
→ Frozen Ice World
→ Gas Giant
→ Ice Giant
→ Hot Jupiter
→ Radiant Star
→ Stellar Evolution Stage
→ Cosmic Singularity
Explore Cosmic Challenges
Complete six handcrafted scenarios that test your understanding of planetary evolution — from creating habitable worlds to exploring advanced stellar phenomena. Discover new knowledge through the in-game Codex.
Creative Sandbox Tools
• Sculpt planetary surfaces with precision tools
• Adjust gravity and experiment with planetary physics
• Customize world properties with detailed sliders
• Save and revisit your favorite creations
• Create meteor streams or individual cosmic events
• Observe dramatic stellar transformations through simulation
No limits. No timers. Just creativity, exploration, and the wonders of the universe.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Vu Nguyen Anh, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Identifiers
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Vu Nguyen Anh
- Size
- 35.1 MB
- Category
- Simulation
- Compatibility
Requires iOS 15.6 or later.
- iPhone
Requires iOS 15.6 or later. - iPod touch
Requires iOS 15.6 or later. - Mac
Requires macOS 12.5 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 ProtoCradle