# RTPro+ Image vs ModTruss

The clearest difference is iOS requirement: ModTruss at 13.0 against RTPro+ Image's 15.6. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RTPro+ Image ships an update weekly, ModTruss every 10 days. The most recent releases landed on September 29, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | RTPro+ Image | ModTruss |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (9 ratings)](https://appshunter.io/ios/app/modtruss/id6754048518/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 10 days |
| Monetization | — | Free |
| Size | 4 MB | 24 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rental Tracker, Inc.](https://appshunter.io/developer/935518347) | [Derek Gauger](https://appshunter.io/developer/1846460318) |

## What reviewers say

### RTPro+ Image

[App page](https://appshunter.io/ios/app/rtpro-plus-image/id6744625996)

**In-app purchases:** none


### ModTruss

[App page](https://appshunter.io/ios/app/modtruss/id6754048518)

This app helps engineers and event professionals quickly calculate load capacities for structural systems. It allows users to select product types, load patterns, and span lengths to find the right components for their projects, all while working offline.

**Highlights:** Smart load calculator, Flexible unit switching (Imperial/Metric), Supports multiple load types, Various configuration options, Offline functionality, Accurate, manufacturer-sourced data

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

**In-app purchases:** none


## Frequently asked questions

### Is RTPro+ Image free?

RTPro+ Image is free to download, with no in-app purchases.

### Is ModTruss free?

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

### Do RTPro+ Image or ModTruss have ads?

Neither RTPro+ Image nor ModTruss shows ads.

### Which is updated more often, RTPro+ Image or ModTruss?

RTPro+ Image ships an update weekly, and ModTruss every 10 days. Most recently, RTPro+ Image was updated on September 29, 2026 and ModTruss on October 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.*