# Oilcalcs vs PSC Check

The clearest difference is price: PSC Check at Free against Oilcalcs's $9.99. PSC Check also leads on rating (5.0 vs 4.8). Oilcalcs's advantage is ratings volume (46 vs 1) and update cadence (every 4 months vs every 10 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

PSC Check is free to download; Oilcalcs costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

PSC Check holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Oilcalcs has 46 ratings behind it against 1, so its average is the more settled of the two.

Oilcalcs ships an update every 4 months, PSC Check every 10 months. The most recent releases landed on October 23, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Oilcalcs | PSC Check |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.8 (46 ratings)](https://appshunter.io/ios/app/oilcalcs/id612283154/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/psc-check/id1181775762/reviews)** |
| Number of ratings | **46** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 10 months |
| Monetization | Paid | **Free** |
| Size | 2 MB | 27 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [ron mooring](https://appshunter.io/developer/612283157) | [NIPPON KAIJI KYOKAI GENERAL INCORPORATED FOUNDATION](https://appshunter.io/developer/956676437) |

## What reviewers say

### Oilcalcs

[App page](https://appshunter.io/ios/app/oilcalcs/id612283154)

This app provides comprehensive calculations for professionals in the oil and gas industry. It offers versatile tools for volume and weight conversions, density corrections, and blending calculations, supporting various industry tables and units.

**Highlights:** Volume and weight conversions, Density correction for special applications, Viscosity, pour point, and flash point blender, LNG and LPG density calculators, Support for ASTM tables and units, Data export to database

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

**In-app purchases:** none


### PSC Check

[App page](https://appshunter.io/ios/app/psc-check/id1181775762)

This app assists with pre-departure equipment checks for maritime vessels, helping to reduce the risk of inspection detentions and deficiencies. It categorizes items by location, allows for input of inspection results with notes and photos, and generates PDF reports. Users can also review statistical data on common deficiencies.

**Highlights:** Categorized equipment checklist by location, Input inspection results with notes and photos, Generate PDF reports for shore-side forwarding, Analyze detainable deficiency statistics, Regular updates for checklist and statistics

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Oilcalcs free?

Oilcalcs costs $9.99, with no in-app purchases.

### Is PSC Check free?

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

### Which has better reviews, Oilcalcs or PSC Check?

PSC Check is rated higher. Oilcalcs averages 4.8 out of 5 from 46 ratings, while PSC Check averages 5.0 from 1 ratings.

### Do Oilcalcs or PSC Check have ads?

Neither Oilcalcs nor PSC Check shows ads.

### Which is updated more often, Oilcalcs or PSC Check?

Oilcalcs ships an update every 4 months, and PSC Check every 10 months. Most recently, Oilcalcs was updated on October 23, 2026 and PSC Check on October 12, 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.*