# Grinder Master 3D vs Rail Defence

The clearest difference is in-app purchases: Grinder Master 3D at none against Rail Defence's 18. Grinder Master 3D also leads on iOS requirement (11.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Rail Defence sells 18 one-off in-app purchases. Grinder Master 3D asks for nothing beyond the download.

## The numbers

| Metric | Grinder Master 3D | Rail Defence |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (1.1K ratings)](https://appshunter.io/ios/app/rail-defence/id6739333810/reviews)** |
| Number of ratings | — | **1.1K** |
| Positive reviews | — | 1.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | — | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 277 MB | 156 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 4+ |
| Developer | [FRIENDLY APPS LTD](https://appshunter.io/developer/1514360327) | [Upperpik Oyun Yazilim ve Pazarlama Ticaret Anonim Sirketi](https://appshunter.io/developer/1225221447) |

## What reviewers say

### Grinder Master 3D

[App page](https://appshunter.io/ios/app/grinder-master-3d/id6451417898)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Grinder Master 3D free?

Grinder Master 3D is free to download, with no in-app purchases.

### Is Rail Defence free?

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

### Do Grinder Master 3D or Rail Defence have ads?

Both Grinder Master 3D and Rail Defence show ads.

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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.*