Under Up vs Alien Attack
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Under Up
A physics-based climbing game where players tap to ascend through challenging levels filled with unpredictable obstacles. Survive each stage by avoiding hazards and reaching the top without losing all your hearts. Enjoy colorful visuals and addictive gameplay.
- Physics-based gameplay
- Dozens of unique obstacles
- Increasing difficulty
- Simple tap controls
- Colorful visuals
- Addictive challenge
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Under Up is a funny and challenging physics-based climbing game where everything wants to stop you from going up! Tap to launch your character upward, avoid crazy obstacles, use springs, pipes, rotating bars, bouncing balls, and survive through each level. Every stage is filled with moving hazards that react differently each time. Can you reach the top without losing your hearts? Features: • Fun and unpredictable physics-based gameplay • Dozens of unique obstacles: viruses, rocks, springs, pipes, and more • Increasing difficulty with each level • Simple tap controls, perfect for quick play • Colorful visuals and cartoon-style characters • Addictive “just one more try” challenge Plan your jump, react fast. Under Up — how high can you go?
Alien Attack
Control a rapidly evolving alien lifeform and conquer Earth. Consume humans to grow stronger, unlock new mutations, and dominate every battlefield. Upgrade your abilities and spread your alien domination across the planet.
- Evolve alien lifeform
- Consume humans for energy
- Unlock new mutations and powers
- Action-packed battles
- Upgrade abilities
- Conquer world locations
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Earth has become your hunting ground. Control a rapidly evolving alien lifeform, consume humans, and grow stronger with every invasion. Every battle makes you stronger. Every evolution unlocks new powers. Every city brings fresh prey. EVOLVE YOUR ALIEN Unlock powerful mutations, increase your strength, and transform into the ultimate lifeform. DEVOUR EVERYTHING Humans are your food. Hunt them down, consume them, and use their energy to grow even stronger. ACTION-PACKED GAMEPLAY Fight endless waves of enemies, destroy everything in your way, and dominate every battlefield. UPGRADE & MUTATE Discover new abilities, improve your attacks, and create unstoppable mutation combinations. CONQUER THE WORLD Invade new locations, face stronger enemies, and spread your alien domination across the planet. The invasion has begun. How far can your evolution go?
Screenshots
Verdict
The clearest difference is rating: Under Up at 5.0 against Alien Attack's 4.0. Under Up also leads on review sentiment (100% vs 67%) and iOS requirement (13.0 vs 15.0). Alien Attack's advantage is in-app purchases (none vs 3) and update cadence (daily vs every 3 days). On price, ads 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
Both are free to download. Under Up sells 3 one-off in-app purchases. Alien Attack asks for nothing beyond the download.
Under Up holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 3 respectively. Written reviews point the same way: 100% of Under Up's written reviews are positive against 67% of Alien Attack's.
Under Up ships an update every 3 days, Alien Attack daily. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.
| Parameter | Under Up | Alien Attack |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.0 (3 ratings) |
| Positive reviews | 100.0% of reviews — better | 66.7% of reviews |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 3 days | Daily — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Ad-supported — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 114 MB | 180 MB |
| Age rating | 4+ | 12+ |
| Developer | Evocentron LLC | HAPPY GAME COMPANY TEKNOLOJI ANONIM SIRKETI |
Customer experience
Under Up
Alien Attack
In-app purchases
Under Up
- Spooki Character Unlock$1.99
- Windy Character Unlock$1.99
- Heli Character Unlock$1.99
Alien Attack
No in-app purchases









