# UFO Drop vs Stack Tower

The clearest difference is price: Stack Tower at Free against UFO Drop's $1.99. UFO Drop's advantage is ads (none vs shown) and update cadence (every 4 days vs every 11 days). On in-app purchases, device support and iOS requirement there is nothing between them.

Stack Tower is free to download; UFO Drop costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UFO Drop ships an update every 4 days, Stack Tower every 11 days. The most recent releases landed on June 22, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | UFO Drop | Stack Tower |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ufo-drop/id6742345509/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 days** | Every 11 days |
| Monetization | Paid | — |
| Size | 7 MB | 69 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Denis Kashin](https://appshunter.io/developer/1140100282) | [Hector Lopez](https://appshunter.io/developer/1812945334) |

## What reviewers say

### UFO Drop

[App page](https://appshunter.io/ios/app/ufo-drop/id6742345509)

Engage in a tactical arcade shooter where you control droplets to combat unique UFOs. Strategically deploy freezing, fire, or lucky drops to defend coins and destroy enemies. Master quick reactions and precise hits in increasingly challenging levels.

**Highlights:** Tactical weapon drops (freezing, fire, lucky), Direct combat control with droplets, Collect all coins before UFOs, Unique UFO enemy types, Multiple challenging levels, Intense pace and adrenaline

**Features:** macOS Compatibility

**In-app purchases:** none


### Stack Tower

[App page](https://appshunter.io/ios/app/stack-tower-reflex-game/id6757759959)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is UFO Drop free?

UFO Drop costs $1.99, with no in-app purchases.

### Is Stack Tower free?

Stack Tower is free to download, with no in-app purchases.

### Do UFO Drop or Stack Tower have ads?

Stack Tower shows ads; UFO Drop does not.

### Which is updated more often, UFO Drop or Stack Tower?

UFO Drop ships an update every 4 days, and Stack Tower every 11 days. Most recently, UFO Drop was updated on June 22, 2026 and Stack Tower on September 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*