# Cat® GRADE Assistant vs Concrete Foundation Calculator

The clearest difference is price: Cat® GRADE Assistant at Free against Concrete Foundation Calculator's $6.99. Cat® GRADE Assistant also leads on iOS requirement (14.0 vs 17.0). Concrete Foundation Calculator's advantage is update cadence (daily vs every 8 months). On ads, in-app purchases and device support there is nothing between them.

Cat® GRADE Assistant is free to download; Concrete Foundation Calculator costs $6.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Cat® GRADE Assistant ships an update every 8 months, Concrete Foundation Calculator daily. Both last shipped on October 25, 2026.

## The numbers

| Metric | Cat® GRADE Assistant | Concrete Foundation Calculator |
| --- | --- | --- |
| Price | **Free** | $6.99 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Daily** |
| Size | 38 MB | 35 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | +4 | 4+ |
| Developer | [Caterpillar Inc.](https://appshunter.io/developer/571668770) | [Fengbang Yang](https://appshunter.io/developer/1796064748) |

## What reviewers say

### Cat® GRADE Assistant

[App page](https://appshunter.io/ios/app/cat-grade-assistant/id1604853064)

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

**In-app purchases:** none


### Concrete Foundation Calculator

[App page](https://appshunter.io/ios/app/concrete-foundation-calculator/id6741881021)

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

**In-app purchases:** none


## Frequently asked questions

### Is Cat® GRADE Assistant free?

Cat® GRADE Assistant is free to download, with no in-app purchases.

### Is Concrete Foundation Calculator free?

Concrete Foundation Calculator costs $6.99, with no in-app purchases.

### Do Cat® GRADE Assistant or Concrete Foundation Calculator have ads?

Neither Cat® GRADE Assistant nor Concrete Foundation Calculator shows ads.

### Which is updated more often, Cat® GRADE Assistant or Concrete Foundation Calculator?

Cat® GRADE Assistant ships an update every 8 months, and Concrete Foundation Calculator daily. Most recently, Cat® GRADE Assistant was updated on October 25, 2026 and Concrete Foundation Calculator on October 25, 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.*