# Idle Factories Builder vs Dam Builder 3D

The clearest difference is rating: Dam Builder 3D at 4.8 against Idle Factories Builder's 4.1. Dam Builder 3D also leads on ratings volume (10K vs 35) and review sentiment (64% vs 40%). Idle Factories Builder's advantage is update cadence (every 2 weeks vs every 2 months) and iOS requirement (11.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Idle Factories Builder sells 3 one-off in-app purchases and Dam Builder 3D sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Dam Builder 3D holds the better App Store score, 4.8 against 4.1. That said, the two scores are not equally well evidenced: Dam Builder 3D has 10K ratings behind it against 35, so its average is the more settled of the two. Written reviews point the same way: 40% of Idle Factories Builder's written reviews are positive against 64% of Dam Builder 3D's.

Idle Factories Builder ships an update every 2 weeks, Dam Builder 3D every 2 months. The most recent releases landed on November 3, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Idle Factories Builder | Dam Builder 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (35 ratings)](https://appshunter.io/ios/app/idle-factories-builder/id1537952150/reviews) | **[4.8 (10K ratings)](https://appshunter.io/ios/app/dam-builder-3d/id6477145747/reviews)** |
| Number of ratings | 35 | **10K** |
| Positive reviews | 40.0% of reviews | **64.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 2 weeks** | Every 2 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 213 MB | 209 MB |
| Requires iOS | **11.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [AI Games FZ](https://appshunter.io/developer/1478916023) | [Solid Games](https://appshunter.io/developer/1625798412) |

## What reviewers say

### Idle Factories Builder

[App page](https://appshunter.io/ios/app/idle-factories-builder/id1537952150)

Build and automate your own industrial empire. Manage finances, hire employees, and upgrade factories to maximize profits. Enjoy offline bonuses and watch your fortune grow in this engaging business simulator.

**Highlights:** Build and manage factories, Automate production lines, Hire and train employees, Upgrade industrial facilities, Collect offline bonuses, Expand your business empire

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Forced Ads | $4.99 | one-time |
| No Ads (Discount) | $11.99 | one-time |
| No Ads | $16.99 | one-time |


### Dam Builder 3D

[App page](https://appshunter.io/ios/app/dam-builder-3d/id6477145747)

Build and expand a dam in this idle simulation game. Earn profits by releasing water and upgrade your dam. Unlock a fishing fleet to catch and sell fish for even more rewards.

**Highlights:** Construct and expand dams, Release water for profit, Upgrade dam sections, Unlock upstream dock, Operate a fishing boat, Expand fishing fleet

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Diamond Pack 1 | $1.99 | one-time |
| AD ticket (Mid) | $1.99 | one-time |
| AD ticket (Big) | $3.99 | one-time |
| No Ads Lite | $4.99 | one-time |
| Diamond Pack 2 | $4.99 | one-time |
| Diamond Package (Small) | $4.99 | one-time |
| No Ads Plus | $9.99 | one-time |
| Diamond Pack 3 | $9.99 | one-time |
| Remove force ad forever | $9.99 | one-time |
| Diamond Package (Big) | $9.99 | one-time |

**What reviewers like**

- 👍 Fun and addictive gameplay
- 💰 Ability to make money
- 🎨 Great graphics
- 🕹️ Challenging and engaging

**What reviewers complain about**

- 🤖 Excessive ads
- ⏱️ Long ad durations
- 🔁 Repetitive levels
- 🐛 Occasional bugs and glitches

**Reported bugs**

- Ads not working as intended
- Game freezing or crashing
- Issues with in-app purchases

**Requested features**

- More maps and levels
- Reduced ad frequency
- Shorter ad durations
- Improved water physics


## Frequently asked questions

### Is Idle Factories Builder free?

Idle Factories Builder is free to download, with in-app purchases available.

### Is Dam Builder 3D free?

Dam Builder 3D is free to download, with in-app purchases available.

### Which has better reviews, Idle Factories Builder or Dam Builder 3D?

Dam Builder 3D is rated higher. Idle Factories Builder averages 4.1 out of 5 from 35 ratings, while Dam Builder 3D averages 4.8 from 10K ratings.

### Do Idle Factories Builder or Dam Builder 3D have ads?

Both Idle Factories Builder and Dam Builder 3D show ads.

### Which is updated more often, Idle Factories Builder or Dam Builder 3D?

Idle Factories Builder ships an update every 2 weeks, and Dam Builder 3D every 2 months. Most recently, Idle Factories Builder was updated on November 3, 2026 and Dam Builder 3D on November 7, 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.*