Earth Orbit Defense vs Sky Versus
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Earth Orbit Defense
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Earth Orbit Defense is a fast-paced sci-fi arcade defense game where Earth sits at the center of the battlefield and hostile orbital material fields choke the planet. Rotate the world, clear the ring, survive timed missions, and build a stronger defense network across 600 handcrafted levels. Fight through escalating chapters, break dense orbital debris fields, and unlock the next frontier only when your upgrades are strong enough. Every mission pushes you to balance speed, precision, and long-term progression. Features: - 600 campaign levels across 20 escalating chapters - Auto-fire combat with planet rotation control - Long-term upgrades for damage, fire rate, and orbit drive - Timed research progression with instant-finish Time Tickets - Optional rewarded boosts for 2x Gold, extra time, faster research, and temporary 2x fire rate - Game Center leaderboard support - 10 supported in-app languages - Premium tactical sci-fi presentation built for portrait iPhone play Can you clear the ring, protect Earth, and survive every orbit?
Sky Versus
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One device, two players, and an exciting fingertip air battle! Sky Versus is a simple and fast-paced local two-player game. Each player controls a fighter aircraft from opposite ends of the screen. Move left or right, aim carefully, and fire to break through your opponent’s defenses. Dodge incoming attacks or use your own shots to intercept enemy fire. Master your timing, predict your opponent’s movements, and secure victory before your ammunition runs out! Features: • Local two-player battles on a single iPhone or iPad • Simple and intuitive movement and firing controls • Colliding projectiles add an extra layer of strategy • Three game modes with different score limits and ammunition counts • Clear displays for health, score, and remaining ammunition • Colorful explosions, background music, and sound effects • Supports Traditional Chinese, Simplified Chinese, and English • Designed for both iPhone and iPad Invite a friend to sit across from you and find out who is the true air combat champion! Sky Versus is free to play and contains advertisements.
Screenshots
Verdict
The clearest difference is in-app purchases: Sky Versus at none against Earth Orbit Defense's 6. Earth Orbit Defense's advantage is update cadence (every 4 days vs every 5 weeks). On price, ads, device support and iOS requirement 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. Earth Orbit Defense sells 6 one-off in-app purchases. Sky Versus asks for nothing beyond the download.
Earth Orbit Defense ships an update every 4 days, Sky Versus every 5 weeks. The most recent releases landed on November 9, 2026 and October 31, 2026 respectively.
| Parameter | Earth Orbit Defense | Sky Versus |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 4 days — better | Every 5 weeks |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 19 MB | 11 MB |
| Age rating | 12+ | 4+ |
| Developer | Aeon Design LLC | YILI CHO |
In-app purchases
Earth Orbit Defense
- Scout Gold$1.99
- 3 Time Tickets$2.99
- Fleet Gold$3.99
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- Starter Bundle$4.99
- 8 Time Tickets$5.99
- Planet Gold$6.99
Sky Versus
No in-app purchases
Questions
Is Earth Orbit Defense free?
Is Sky Versus free?
Do Earth Orbit Defense or Sky Versus have ads?
Which is updated more often, Earth Orbit Defense or Sky Versus?
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