Stack 101 Tower vs Kaiju Defense
Price, ratings, monetisation and update history for both games, side by side — with what reviewers say about each.
Stack 101 Tower
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Stack 101 Tower: The Boba Challenge Eyes of a Hawk. Hands of a God. Can you reach 101? Stop playing casual. Stack 101 Tower is the ultimate test of precision and speed. No more excuses—without razor-sharp eyesight and lightning reflexes, you'll never survive the climb. • God-Tier Precision: One pixel off, and it’s game over. Only the elite can maintain the balance. • Rapid Reflexes: The higher you go, the faster it gets. Do you have the speed to keep up? • The Ultimate Reward: Only a true Stacking King can reach Floor 101 to claim the legendary Pearl Milk Tea. The Boba is at the top. Are you fast enough to take it?
Kaiju Defense
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Alien monsters and giant kaiju are climbing 100 landmarks! Aim your cannon and hit only the monsters. Every stray shell damages the building and the citizens inside. ■100 landmarks, 200 stages Every landmark has its own structure and sky — defend them all. Clear 100 stages to unlock "Recovery Ops", where you defend landmarks under repair. ■Buildings that collapse for real Buildings break apart block by block. Lose the supports and they tilt and topple; catch fire and the flames spread until they fall. Falling debris crushes the monsters below. ■7 shell types High-explosive, precision, cryo (freezes and extinguishes), incendiary (fire zones), heavy, cluster and piercing — pick the right one for every situation. ■Monsters and giant kaiju Crawlers that scale walls, steel gorillas that pound rooftops, UFOs that abduct citizens, and a giant kaiju every 10 stages. ■Protect the citizens Buy time for the citizens inside to evacuate. Three stars depend on how much of the building you save and how few citizens get hurt.
Screenshots
Verdict
The clearest difference is in-app purchases: Stack 101 Tower at none against Kaiju Defense's 1. Stack 101 Tower also leads on iOS requirement (12.0 vs 15.0). Kaiju Defense's advantage is update cadence (every 2 days vs every 5 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. Kaiju Defense sells 1 one-off in-app purchase. Stack 101 Tower asks for nothing beyond the download.
Stack 101 Tower ships an update every 5 days, Kaiju Defense every 2 days. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.
| Parameter | Stack 101 Tower | Kaiju Defense |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 days | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 54 MB | 88 MB |
| Age rating | 4+ | 12+ |
| Developer | ZHENG YU-XIANG | Jegeon Jung |
In-app purchases
Stack 101 Tower
No in-app purchases
Kaiju Defense
- Remove Ads$2.99
Questions
Is Stack 101 Tower free?
Is Kaiju Defense free?
Do Stack 101 Tower or Kaiju Defense have ads?
Which is updated more often, Stack 101 Tower or Kaiju Defense?
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