# STRUCT Construction Calculator vs Indus PDF

The clearest difference is update cadence: Indus PDF at every 6 weeks against STRUCT Construction Calculator's every 4 months. STRUCT Construction Calculator's advantage is iOS requirement (13.0 vs 15.5). On price, ads, in-app purchases and device support there is nothing between them.

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

STRUCT Construction Calculator ships an update every 4 months, Indus PDF every 6 weeks. The most recent releases landed on October 11, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | STRUCT Construction Calculator | Indus PDF |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Size | 16 MB | 75 MB |
| Requires iOS | **13.0** | 15.5 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [MOBILEXAPPS MB](https://appshunter.io/developer/1685170475) | [Arpit Kanstiya](https://appshunter.io/developer/1861058320) |

## What reviewers say

### STRUCT Construction Calculator

[App page](https://appshunter.io/ios/app/struct-construction-calculator/id6758335610)

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

**In-app purchases:** none


### Indus PDF

[App page](https://appshunter.io/ios/app/indus-pdf-scanner-and-ocr/id6785264499)

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

**In-app purchases:** none


## Frequently asked questions

### Is STRUCT Construction Calculator free?

STRUCT Construction Calculator is free to download, with no in-app purchases.

### Is Indus PDF free?

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

### Do STRUCT Construction Calculator or Indus PDF have ads?

Neither STRUCT Construction Calculator nor Indus PDF shows ads.

### Which is updated more often, STRUCT Construction Calculator or Indus PDF?

STRUCT Construction Calculator ships an update every 4 months, and Indus PDF every 6 weeks. Most recently, STRUCT Construction Calculator was updated on October 11, 2026 and Indus PDF on October 14, 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.*