Comparison

Oil density vs DataCentral

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Oil density

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
Read full description

The professional petroleum metering calculation tool of GB/T 1885-1998 national standard is adopted to automatically query the standard density table of the petroleum metering meter, convert the apparent density measured by the petroleum densitometer into the standard density, and calculate the volume correction factor (VCF) at the same time, so as to calculate the standard volume and mass of oil products, which improves the efficiency and calculation accuracy compared with manual query.

About

DataCentral

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
Read full description

DataCentral is the app for watching the US AI data center race — from Stargate-scale campuses and xAI's Colossus to the grid strain the buildout is creating. We don't pretend other companies' sites are live. Follow the buildout (free) - Buildout Pulse — sourced stories of announcements, milestones, and grid news, each with a source and an as-of date. - The Race — leaderboards ranking builders, states, and campuses by announced gigawatts. First open sets an overnight baseline rather than inventing climbers. Share a leaderboard card in a tap. - Grid — a three-state teaser ranked by the registry model, labeled "not live EIA," with MW announced and AI announced. Pro unlocks live EIA ranking. - Catalog — nationwide facilities with announced MW. Online and Building are registry status, not live health. - Your State — pick a state for its EIA residential electricity rate (labelled with the month published) shown beside announced facility MW and public proceedings. The app does not attribute rate changes to data centers. - Home Screen widgets — tracked announced capacity and the latest headline, updated in the background from a local snapshot. - One custom site to track your own facility manually. DataCentral Pro - Live facility telemetry — connect your own sites via HTTPS you supply and stream live power, utilization, and status on a real poll cadence. - Live EIA ranking — full state grid ranking from EIA-930, not the free registry teaser. - Assistant — ask about your watches, Race ranks, Grid, and Time to Power. Answers are grounded in data already in the app. - Unlimited custom data centers, with status/grid alerts and a "My Site" widget. - Energy cost modeling with customizable $/kWh. - Predictive insights and infrastructure alerts. - Annual plan includes a 7-day free trial. Honest data labeling - Cover copy states we don't pretend other companies' sites are live. - Pulse cards carry a source and an as-of date (for example "Updated Aug 27, 2026"). - Race ranks announced GW. Overnight Moves starts as a baseline on first open. - Free Grid is the registry model, labeled not live EIA. Rows read MW announced / AI announced. - Catalog MW is Announced. Online / Building are registry status, not live health. - Connected sites you instrument are badged LIVE with a last-updated timestamp. - Live telemetry requires a metrics endpoint you control (or a gateway you deploy). Who it's for - Investors and analysts tracking the US AI infrastructure buildout. - Enthusiasts following Stargate, Colossus, and the gigawatt race. - Infrastructure engineers and operators monitoring their own facilities. Subscription required for live connections, live EIA ranking, Assistant, and other Pro features. The Race, Pulse, registry Grid teaser, nationwide catalog, and manual custom sites remain available without a subscription.

Screenshots

Oil density3 screens
DataCentral4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
Oil density versus DataCentral: the parameters behind the verdict, then further details
ParameterOil densityDataCentral
PriceFreeFree
Rating1.0 (1 ratings)5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings12 — better
Update frequencyEvery 47 monthsEvery 3 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree — betterFreemium
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size7 MB34 MB
Age rating4+4+
Developer昆 张Stephen Moore

Customer experience

Oil density

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

DataCentral

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

Oil density

One-time2
  • Monthly card$2.99
  • Lifetime Card$8.99
2 purchases

DataCentral

Subscriptions2
  • DataCentral Pro Monthly$9.991 Month
  • DataCentral Pro Annual$89.991 Year

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.

Other comparisons