# Whirlwind Evolution vs Rail Defence

The clearest difference is review sentiment: Whirlwind Evolution at 75% against Rail Defence's 2%. Whirlwind Evolution also leads on rating (4.8 vs 4.1) and ratings volume (5.9K vs 894). Rail Defence's advantage is update cadence (fortnightly vs every 11 months) and iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Whirlwind Evolution sells 8 one-off in-app purchases and Rail Defence sells 18 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Whirlwind Evolution holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: Whirlwind Evolution has 5.9K ratings behind it against 894, so its average is the more settled of the two. Written reviews point the same way: 75% of Whirlwind Evolution's written reviews are positive against 2% of Rail Defence's.

Whirlwind Evolution ships an update every 11 months, Rail Defence fortnightly. Both last shipped on September 22, 2026.

## The numbers

| Metric | Whirlwind Evolution | Rail Defence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5.9K ratings)](https://appshunter.io/ios/app/whirlwind-evolution/id6670462746/reviews)** | [4.1 (894 ratings)](https://appshunter.io/ios/app/rail-defence/id6739333810/reviews) |
| Number of ratings | **5.9K** | 894 |
| Positive reviews | **75.0% of reviews** | 1.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 11 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 200 MB | 156 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Solid Games](https://appshunter.io/developer/1625798412) | [Upperpik Oyun Yazilim ve Pazarlama Ticaret Anonim Sirketi](https://appshunter.io/developer/1225221447) |

## What reviewers say

### Whirlwind Evolution

[App page](https://appshunter.io/ios/app/whirlwind-evolution/id6670462746)

Become a master of destruction in this idle evolution game. Start as a small whirlwind and grow into a colossal force, upgrading power, size, and speed to devastate cities. Witness your whirlwind's mesmerizing transformation as you become unstoppable.

**Highlights:** Evolve a whirlwind, Upgrade power, size, and speed, Destroy cities, Idle gameplay, Mesmerizing transformations

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diamond Pack 1 | $1.99 | one-time |
| Diamond Pack 2 | $4.99 | one-time |
| No Ads Lite | $4.99 | one-time |
| Diamond Pack 3 | $9.99 | one-time |
| No Ads Plus | $9.99 | one-time |
| Diamond Pack 4 | $19.99 | one-time |
| Diamond Pack 5 | $49.99 | one-time |
| Diamond Pack 6 | $99.99 | one-time |

**What reviewers like**

- 🚀 Best game
- 🚀 Whirlwind Evolution
- 👍 Funniest game ever made
- 👍 I love it it is so good
- 👍 I loveeeee it

**What reviewers complain about**

- 🐛 Une tonne de pubs, extrêmement répétitif, et aucun contenu, je déconseille, je supprime

**Reported bugs**

- Never mind, I just tried the spin the wheel and even though it says to watch an ad it doesn't make you

**Requested features**

- Never mind, I just tried the spin the wheel and even though it says to watch an ad it doesn't make you


### Rail Defence

[App page](https://appshunter.io/ios/app/rail-defence/id6739333810)

Defend your castle from waves of enemies by strategically placing and upgrading weapons on a circular railway. Utilize special powers and enhanced armaments to repel increasingly formidable foes and protect your stronghold.

**Highlights:** Circular railway defense, Acquire new weapons, Upgrade weapons, Strengthen defenses, Special powers

**Features:** macOS Compatibility

**In-app purchases (18)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Cash kickstart pack | $1.99 | one-time |
| 10 Tickets | $1.99 | one-time |
| Manager | $2.99 | one-time |
| Money Fountain Pack | $2.99 | one-time |
| Engineer | $2.99 | one-time |
| 20 Tickets | $2.99 | one-time |
| Big Deal Pack | $3.99 | one-time |
| Financier | $3.99 | one-time |
| Royal Treasury Pack | $4.99 | one-time |
| 50 Tickets | $4.99 | one-time |
| No Ads | $4.99 | one-time |
| Bundle | $5.99 | one-time |
| Treasury Trove Pack | $5.99 | one-time |
| 30 Tickets and No Ads | $5.99 | one-time |
| Mega Bundle | $7.99 | one-time |
| Big Vault Pack | $8.99 | one-time |
| Ultra Bundle | $10.99 | one-time |
| Big Chest Treasure | $11.99 | one-time |

**What reviewers like**

- 🚀 Hack

**What reviewers complain about**

- 🐛 Glitches
- 💸 Obscene amount of Ads
- 💸 Advertisement Simulator
- 💸 Ads Ads & more Ads
- 💸 Ads

**Reported bugs**

- The bomb does not work after a few seconds
- Randomly the weapons won't work
- The crossbow stops working after a while

**Requested features**

- More levels
- Different zombies
- More upgrades


## Frequently asked questions

### Is Whirlwind Evolution free?

Whirlwind Evolution is free to download, with in-app purchases available.

### Is Rail Defence free?

Rail Defence is free to download, with in-app purchases available.

### Which has better reviews, Whirlwind Evolution or Rail Defence?

Whirlwind Evolution is rated higher. Whirlwind Evolution averages 4.8 out of 5 from 5.9K ratings, while Rail Defence averages 4.1 from 894 ratings.

### Do Whirlwind Evolution or Rail Defence have ads?

Both Whirlwind Evolution and Rail Defence show ads.

### Which is updated more often, Whirlwind Evolution or Rail Defence?

Whirlwind Evolution ships an update every 11 months, and Rail Defence fortnightly. Most recently, Whirlwind Evolution was updated on September 22, 2026 and Rail Defence on September 22, 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.*