# Build a Bridge! vs Bridge Race 3D Stack Stair Run

The clearest difference is in-app purchases: Bridge Race 3D Stack Stair Run at none against Build a Bridge!'s 10. Bridge Race 3D Stack Stair Run also leads on iOS requirement (13.0 vs 15.0). Build a Bridge!'s advantage is update cadence (every 2 months vs every 6 months). On price, ads and device support there is nothing between them.

Both are free to download. Build a Bridge! sells 9 one-off in-app purchases. Bridge Race 3D Stack Stair Run asks for nothing beyond the download.

Build a Bridge! ships an update every 2 months, Bridge Race 3D Stack Stair Run every 6 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Build a Bridge! | Bridge Race 3D Stack Stair Run |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (26K ratings)](https://appshunter.io/ios/app/build-a-bridge/id1165289168/reviews)** | — |
| Number of ratings | **26K** | — |
| Positive reviews | 59.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free with in-app purchases | — |
| Size | 325 MB | 93 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [BoomBit, Inc.](https://appshunter.io/developer/1045926022) | [刚 曾](https://appshunter.io/developer/324816540) |

## What reviewers say

### Build a Bridge!

[App page](https://appshunter.io/ios/app/build-a-bridge/id1165289168)

A physics-based puzzle game where you design and build bridges using various materials. Test your creations in 3D to see if they hold up under pressure, with multiple levels and environments to explore.

**Highlights:** Physics-based bridge construction, Choose from wood, metal, and cables, 86 challenging levels, Realistic physics engine, 3D testing mode, Easy mode for creativity

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Easy Mode | $0.99 | one-time |
| Small Coins Pack | $1.99 | one-time |
| Space World | $1.99 | one-time |
| Easy Mode | $2.99 | one-time |
| Remove Ads | $2.99 | one-time |
| Welcome Offer Unlock All | $4.99 | one-time |
| Welcome Offer - Starter Pack | $4.99 | one-time |
| Orient World | $5.99 | one-time |
| Unlock All | $9.99 | one-time |

**What reviewers like**

- 🚀 Addictive gameplay
- 👍 Realistic physics
- 🚀 No WiFi required
- 🚀 Good graphics
- 👍 Teaches engineering concepts

**What reviewers complain about**

- 🐛 Frequent crashes
- 💰 Excessive ads and in-app purchases
- 🤯 Extremely difficult levels
- 🤔 Unrealistic bridge scenarios
- 🤯 Confusing mechanics

**Reported bugs**

- Progress not saving properly
- Game freezing and crashing
- Ads causing the game to malfunction

**Requested features**

- More levels and content updates
- Controller support
- Easier difficulty mode
- Less intrusive ads
- Ability to build bridges freely without restrictions


### Bridge Race 3D Stack Stair Run

[App page](https://appshunter.io/ios/app/bridge-race-3d-stack-stair-run/id1598056347)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Build a Bridge! free?

Build a Bridge! is free to download, with in-app purchases available.

### Is Bridge Race 3D Stack Stair Run free?

Bridge Race 3D Stack Stair Run is free to download, with no in-app purchases.

### Do Build a Bridge! or Bridge Race 3D Stack Stair Run have ads?

Both Build a Bridge! and Bridge Race 3D Stack Stair Run show ads.

### Which is updated more often, Build a Bridge! or Bridge Race 3D Stack Stair Run?

Build a Bridge! ships an update every 2 months, and Bridge Race 3D Stack Stair Run every 6 months. Most recently, Build a Bridge! was updated on November 4, 2026 and Bridge Race 3D Stack Stair Run on November 3, 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.*