# Oilcalcs vs H/Comet Mobile

The clearest difference is price: H/Comet Mobile at Free against Oilcalcs's $9.99. H/Comet Mobile also leads on update cadence (every 3 weeks vs every 4 months) and rating (5.0 vs 4.8). Oilcalcs's advantage is ratings volume (46 vs 2). On ads, in-app purchases and device support there is nothing between them.

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

H/Comet Mobile 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 2, so its average is the more settled of the two.

Oilcalcs ships an update every 4 months, H/Comet Mobile every 3 weeks. The most recent releases landed on November 1, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Oilcalcs | H/Comet Mobile |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [4.8 (46 ratings)](https://appshunter.io/ios/app/oilcalcs/id612283154/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hcomet-mobile/id1138408392/reviews)** |
| Number of ratings | **46** | 2 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Paid | **Free** |
| Size | 2 MB | 58 MB |
| Requires iOS | 15.6 | **9.2** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ron mooring](https://appshunter.io/developer/612283157) | [Haverly Systems, Inc.](https://appshunter.io/developer/1125079838) |

## 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


### H/Comet Mobile

[App page](https://appshunter.io/ios/app/hcomet-mobile/id1138408392)

Access and manage crude assay data, slates, blends, and cut sets on the go. Search for assays, modify cut sets, and perform slate operations like comparisons and graphing. Analyze data with value/cut lookup tools.

**Highlights:** Access assay libraries, slates, blends, and cut sets, Search and view detailed assay data, Re-cut assays with H/CAMS technology, Create and modify cut sets, Access and modify existing or create new slates, Perform slate operations like cut comparisons and graphing, Access and modify existing or create new blends

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Oilcalcs free?

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

### Is H/Comet Mobile free?

H/Comet Mobile is free to download, with no in-app purchases.

### Which has better reviews, Oilcalcs or H/Comet Mobile?

H/Comet Mobile is rated higher. Oilcalcs averages 4.8 out of 5 from 46 ratings, while H/Comet Mobile averages 5.0 from 2 ratings.

### Do Oilcalcs or H/Comet Mobile have ads?

Neither Oilcalcs nor H/Comet Mobile shows ads.

### Which is updated more often, Oilcalcs or H/Comet Mobile?

Oilcalcs ships an update every 4 months, and H/Comet Mobile every 3 weeks. Most recently, Oilcalcs was updated on November 1, 2026 and H/Comet Mobile on October 8, 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.*