# Crystal Guard vs Surf Evolution

The clearest difference is in-app purchases: Surf Evolution at none against Crystal Guard's 10. Crystal Guard's advantage is update cadence (every 2 days vs every 6 days) and iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Crystal Guard sells 10 in-app purchases, starting at $4.99 per month. Surf Evolution asks for nothing beyond the download.

Crystal Guard ships an update every 2 days, Surf Evolution every 6 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Crystal Guard | Surf Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/surf-evolution/id6759137551/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 days** | Every 6 days |
| Monetization | Free with in-app purchases | — |
| Size | 283 MB | 162 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [艳 王](https://appshunter.io/developer/1663396375) | [Krishna Ghate](https://appshunter.io/developer/1877028970) |

## What reviewers say

### Crystal Guard

[App page](https://appshunter.io/ios/app/crystal-guard-diy-road/id6504703611)

Defend a fragile crystal from waves of monsters in this unique Roguelite tower defense game. Strategically build mazes with blocks and develop powerful turrets to resist attacks. Adapt your tactics to collect crystals and secure victory.

**Highlights:** Roguelite gameplay, Block puzzle maze creation, Strategic tower defense, Turret development, Unique art style, Casual puzzle elements

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove All Ads For 30 Days | $4.99 | per month |
| Newcomer pack | $0.99 | one-time |
| 10 advertising coupons | $1.99 | one-time |
| 30 advertising coupons | $3.99 | one-time |
| Turret pack | $3.99 | one-time |
| Turret upgrade pack | $5.99 | one-time |
| Golden battle pass | $6.99 | one-time |
| 3000 Diamonds | $7.99 | one-time |
| 70 advertising coupons | $7.99 | one-time |
| Remove advertisements | $19.99 | one-time |


### Surf Evolution

[App page](https://appshunter.io/ios/app/surf-evolution/id6759137551)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Crystal Guard free?

Crystal Guard is free to download, with in-app purchases available.

### Is Surf Evolution free?

Surf Evolution is free to download, with no in-app purchases.

### Do Crystal Guard or Surf Evolution have ads?

Both Crystal Guard and Surf Evolution show ads.

### Which is updated more often, Crystal Guard or Surf Evolution?

Crystal Guard ships an update every 2 days, and Surf Evolution every 6 days. Most recently, Crystal Guard was updated on October 21, 2026 and Surf Evolution on October 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.*