# Bowen Casing Spear Calculator vs Pason

The clearest difference is rating: Bowen Casing Spear Calculator at 5.0 against Pason's 4.4. Bowen Casing Spear Calculator also leads on iOS requirement (9.3 vs 15.0). Pason's advantage is update cadence (every 5 weeks vs every 41 months) and ratings volume (22 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Bowen Casing Spear Calculator holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Pason has 22 ratings behind it against 1, so its average is the more settled of the two.

Bowen Casing Spear Calculator ships an update every 41 months, Pason every 5 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | Bowen Casing Spear Calculator | Pason |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bowen-casing-spear-calculator/id1458884228/reviews)** | [4.4 (22 ratings)](https://appshunter.io/ios/app/pason/id6502012087/reviews) |
| Number of ratings | 1 | **22** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 41 months | **Every 5 weeks** |
| Monetization | Free | Free |
| Size | 42 MB | 64 MB |
| Requires iOS | **9.3** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [NOV Inc.](https://appshunter.io/developer/578550101) | [Pason Systems Corp](https://appshunter.io/developer/867039732) |

## What reviewers say

### Bowen Casing Spear Calculator

[App page](https://appshunter.io/ios/app/bowen-casing-spear-calculator/id1458884228)

This tool calculates the load rating and potential failure modes for spear, mandrel, grapple, and casing systems. It models the entire system, considering field feedback, lab testing, and FEA models for more comprehensive results than manual calculations.

**Highlights:** Load rating calculation, Mode of failure determination, System-wide modeling, Field feedback integration, Lab testing and FEA models, Worst-case scenario analysis

**Features:** macOS Compatibility

**In-app purchases:** none


### Pason

[App page](https://appshunter.io/ios/app/pason/id6502012087)

Access real-time drilling data for your active wells anytime, anywhere. Securely view well information, customize data displays, and access detailed memos to make informed, time-sensitive decisions.

**Highlights:** Real-time drilling data access, Secure data transmission, Customizable data display, View well memos, 1-second data updates, Active well list with drilled depth

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

**In-app purchases:** none


## Frequently asked questions

### Is Bowen Casing Spear Calculator free?

Bowen Casing Spear Calculator is free to download, with no in-app purchases.

### Is Pason free?

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

### Which has better reviews, Bowen Casing Spear Calculator or Pason?

Bowen Casing Spear Calculator is rated higher. Bowen Casing Spear Calculator averages 5.0 out of 5 from 1 ratings, while Pason averages 4.4 from 22 ratings.

### Do Bowen Casing Spear Calculator or Pason have ads?

Neither Bowen Casing Spear Calculator nor Pason shows ads.

### Which is updated more often, Bowen Casing Spear Calculator or Pason?

Bowen Casing Spear Calculator ships an update every 41 months, and Pason every 5 weeks. Most recently, Bowen Casing Spear Calculator was updated on November 3, 2026 and Pason on November 4, 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.*