# Gagemaker MRP 5B Calculator vs JMAC Driver

The clearest difference is update cadence: JMAC Driver at every 6 weeks against Gagemaker MRP 5B Calculator's every 7 months. Gagemaker MRP 5B Calculator's advantage is device support (3 vs 1) and iOS requirement (9.0 vs 15.6). On price, 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.

Gagemaker MRP 5B Calculator ships an update every 7 months, JMAC Driver every 6 weeks. The most recent releases landed on October 5, 2026 and May 18, 2026 respectively.

## The numbers

| Metric | Gagemaker MRP 5B Calculator | JMAC Driver |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/gagemaker-mrp-5b-calculator/id1350017207/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 6 weeks** |
| Monetization | Free | — |
| Size | 86 MB | 36 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Crocodile Software Corporation](https://appshunter.io/developer/1091512831) | [J.P. McMahon Leasing, LLC](https://appshunter.io/developer/1436484777) |

## What reviewers say

### Gagemaker MRP 5B Calculator

[App page](https://appshunter.io/ios/app/gagemaker-mrp-5b-calculator/id1350017207)

Calculate ovality and standoff for API 5B connections using crest diameter readings. This tool provides results that comply with the Sixteenth Edition of API 5B, informing you if your measurements meet published requirements.

**Highlights:** Calculate ovality, Calculate standoff, API 5B compliance, Input crest diameter readings, Check against published requirements

**Features:** macOS Compatibility

**In-app purchases:** none


### JMAC Driver

[App page](https://appshunter.io/ios/app/jmac-driver/id1606198767)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Gagemaker MRP 5B Calculator free?

Gagemaker MRP 5B Calculator is free to download, with no in-app purchases.

### Is JMAC Driver free?

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

### Do Gagemaker MRP 5B Calculator or JMAC Driver have ads?

Neither Gagemaker MRP 5B Calculator nor JMAC Driver shows ads.

### Which is updated more often, Gagemaker MRP 5B Calculator or JMAC Driver?

Gagemaker MRP 5B Calculator ships an update every 7 months, and JMAC Driver every 6 weeks. Most recently, Gagemaker MRP 5B Calculator was updated on October 5, 2026 and JMAC Driver on May 18, 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.*