Planet Eldra
Ecosystem strategy simulation
Free · In‑App Purchases
The distant Planet Eldra.
This world was once covered in endless grasslands.
Herds of great beasts treading the earth, shadows of wings streaking the sky,
bioluminescent trails glowing in the darkness —
countless lives intertwined, and the planet breathed as one living organism.
But the balance collapsed, and the land fell silent.
You are the one who will breathe life back into this world.
Release herbivores, introduce predators, cultivate decomposers.
Eat, be eaten, die, return to soil, and sprout anew —
restore that cycle to this planet once more.
——————————————————
Once placed, the creatures begin to act on their own will.
They graze, hunt, breed, and eventually return to the earth.
Even without your intervention, the ecosystem shifts moment by moment.
But life is never so simple as to "work itself out."
Too many herbivores, and the grasslands vanish.
Without predators, reproduction spirals out of control.
Without decomposers, the land rots from within.
Vegetation and soil, weather and plague, birth and death —
amid this web of interconnections, what you seek is
"stability" — a fragile miracle.
● Unique creatures with autonomous AI behavior
● Real-time simulation linking vegetation, soil, and weather
● Gene tuning to adjust lifespan, fertility, and resistance
● Diverse stages unlocked progressively, plus Hard Mode
● Concept art and detailed creature encyclopedia
There is no single right answer.
Build your own ecosystem on Eldra.
Ratings & Reviews
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Tutorials have been completely rewritten — gentler for beginners!
【New & Improved】
• All tutorials (0-1 through 0-4) rewritten with tighter prose and natural line breaks
• Tutorial popups auto-fit their font size to any device — no more cut-off text
• Highlighted targets now get an animated arrow pointing at them — bars get a bottom-up arrow
• LP cost labels unified to orange-gold, matching the owned LP display
• 16 new sound effects added across menus, tabs, multipliers, and dialogs
• Retry / Retire buttons in the pause dialog now show icons to prevent mis-taps
• Removed the white flash on launch — app now opens with the title screen's dark color
【Minor Fixes】
• Fixed creature encyclopedia stat column overflow
• Improved centering of the stage select screen
• Initial language now auto-detected from device settings (English for non-JP devices)
• Tutorial 0-2 clear condition rebalanced (vegetation now 15%)
Thank you for playing! Please share your feedback so we can keep improving.
The developer, Kotaro Tominaga, 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 Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Kotaro Tominaga
- Size
- 75.2 MB
- Category
- Simulation
- Compatibility
Requires iOS 15.0 or later.
- iPhone
Requires iOS 15.0 or later. - iPad
Requires iPadOS 15.0 or later. - iPod touch
Requires iOS 15.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- 12,000ポイント $5.99
- 70,000ポイント $29.99
- 1,000ポイント $0.49
- Copyright
- © 2026 Kotaro Tominaga