# TRUSSFALL vs Model Engine Builder

The clearest difference is ads: TRUSSFALL at none against Model Engine Builder's shown. Model Engine Builder's advantage is iOS requirement (15.6 vs 17.0). On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. TRUSSFALL sells 3 one-off in-app purchases and Model Engine Builder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

TRUSSFALL ships an update every 8 days, Model Engine Builder weekly. The most recent releases landed on October 31, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | TRUSSFALL | Model Engine Builder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/trussfall-bridge-builder/id6768887407/reviews)** | — |
| Number of ratings | **6** | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 1 MB | 20 MB |
| Requires iOS | 17.0 | **15.6** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CIPRIAN ALEXANDRU FRASINESCU](https://appshunter.io/developer/1896613557) | [MIN GYu OH](https://appshunter.io/developer/6803589847) |

## What reviewers say

### TRUSSFALL

[App page](https://appshunter.io/ios/app/trussfall-bridge-builder/id6768887407)

Build and test realistic bridge designs across 99 engineering trials. Utilize various materials and structural principles to create stable crossings for vehicles. Earn stars by building strong structures that withstand live load simulations.

**Highlights:** 99 engineering trials, 4 realistic materials, Live load simulation, Multiple bridge templates, 10 distinct biomes, On-device data processing

**Features:** Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 5 Hints | $0.99 | one-time |
| 25 Hints | $2.99 | one-time |
| Lifetime Unlock | $4.99 | one-time |


### Model Engine Builder

[App page](https://appshunter.io/ios/app/model-engine-builder/id6803801661)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| removeads | $1.99 | one-time |


## Frequently asked questions

### Is TRUSSFALL free?

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

### Is Model Engine Builder free?

Model Engine Builder is free to download, with in-app purchases available.

### Do TRUSSFALL or Model Engine Builder have ads?

Model Engine Builder shows ads; TRUSSFALL does not.

### Which is updated more often, TRUSSFALL or Model Engine Builder?

TRUSSFALL ships an update every 8 days, and Model Engine Builder weekly. Most recently, TRUSSFALL was updated on October 31, 2026 and Model Engine Builder on November 6, 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.*