# Oil density vs DataCentral

The clearest difference is review sentiment: DataCentral at 100% against Oil density's 0%. DataCentral also leads on rating (5.0 vs 1.0) and update cadence (every 3 days vs every 47 months). Oil density's advantage is monetization model (free vs freemium). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Oil density sells 2 one-off in-app purchases and DataCentral sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

DataCentral holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 0% of Oil density's written reviews are positive against 100% of DataCentral's.

Oil density ships an update every 47 months, DataCentral every 3 days. The most recent releases landed on November 1, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Oil density | DataCentral |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/oil-density/id1641733273/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/datacentral/id6762427769/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 3 days** |
| Monetization | **Free** | Freemium |
| Size | 7 MB | 34 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [昆 张](https://appshunter.io/developer/517645105) | [Stephen Moore](https://appshunter.io/developer/1894111091) |

## What reviewers say

### Oil density

[App page](https://appshunter.io/ios/app/oil-density/id1641733273)

This tool calculates the standard density of oil products based on measured apparent density. It automatically queries density tables and computes volume correction factors for accurate standard volume and mass calculations. Improve efficiency and accuracy compared to manual methods.

**Highlights:** Calculates standard oil density, Queries petroleum density tables, Computes volume correction factor (VCF), Calculates standard volume and mass, Adheres to GB/T 1885-1998 national standard

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly card | $2.99 | one-time |
| Lifetime Card | $8.99 | one-time |


### DataCentral

[App page](https://appshunter.io/ios/app/datacentral/id6762427769)

Monitor your servers, sensors, and infrastructure in real-time from your iPhone. Receive instant alerts for temperature, uptime, and power status changes. Ideal for home labs, small businesses, and colocation racks to prevent downtime.

**Highlights:** Real-time sensor readings, Customizable push notifications, Uptime and power status monitoring, Historical data and trend analysis, Modern interface for quick glances

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DataCentral Pro Monthly | $9.99 | per month |
| DataCentral Pro Annual | $89.99 | per year |


## Frequently asked questions

### Is Oil density free?

Oil density is free to download, with in-app purchases available.

### Is DataCentral free?

DataCentral is free to download, with in-app purchases available.

### Which has better reviews, Oil density or DataCentral?

DataCentral is rated higher. Oil density averages 1.0 out of 5 from 1 ratings, while DataCentral averages 5.0 from 2 ratings.

### Do Oil density or DataCentral have ads?

Neither Oil density nor DataCentral shows ads.

### Which is updated more often, Oil density or DataCentral?

Oil density ships an update every 47 months, and DataCentral every 3 days. Most recently, Oil density was updated on November 1, 2026 and DataCentral on October 31, 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.*