# PullCalc vs GRoof Internal

The clearest difference is update cadence: PullCalc at every 2 months against GRoof Internal's every 8 months. PullCalc also leads on device support. GRoof Internal's advantage is iOS requirement (12.1 vs 16.6). On price 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.

PullCalc ships an update every 2 months, GRoof Internal every 8 months. The most recent releases landed on October 3, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | PullCalc | GRoof Internal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/pullcalc/id907209553/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 2 months** | Every 8 months |
| Monetization | Free | — |
| Size | 21 MB | 116 MB |
| Requires iOS | 16.6 | **12.1** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [GREENLEE TOOLS, INC](https://appshunter.io/developer/1435630923) | [Gunkul Engineering Public Company Limited](https://appshunter.io/developer/1612187137) |

## What reviewers say

### PullCalc

[App page](https://appshunter.io/ios/app/pullcalc/id907209553)

This app assists electricians and contractors in estimating the pull force required for installing electrical cables in conduit. Users input details for each leg of the conduit run, including wire size, conduit ID, and bend angles, to generate an approximate pull force calculation.

**Highlights:** Estimate pull force for cable installation, Input data by conduit legs, Supports various input parameters (wire size, conduit ID, bends), Includes coefficient of friction guidance, Provides suggested friction coefficients for lubricated cable

**Features:** macOS Compatibility

**In-app purchases:** none


### GRoof Internal

[App page](https://appshunter.io/ios/app/groof-internal/id6463375657)

**In-app purchases:** none


## Frequently asked questions

### Is PullCalc free?

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

### Is GRoof Internal free?

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

### Which is updated more often, PullCalc or GRoof Internal?

PullCalc ships an update every 2 months, and GRoof Internal every 8 months. Most recently, PullCalc was updated on October 3, 2026 and GRoof Internal on October 1, 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.*