Appworthy

OIL & GAS REFERENCE

Offline app

Yurii Sushko
Download on theApp Store
Store ratingNo rating
Price$1.99Listed price
Age4+Store age rating
Size2 MBiPhone download
CategoryEducation
DeveloperYurii Sushko

What we found

Full report

Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.

Money

  • $1.99 to download.

Not yet tested.

The store currently lists version 2.5, updated 2026-10-20.

Preview

Screenshot 1Screenshot 2Screenshot 3Screenshot 4Screenshot 5Screenshot 6Screenshot 7Screenshot 8

Store screenshots supplied by the developer.

About this app

Oil & Gas Reference is an offline toolkit for drilling and production engineers, students and anyone working in the oil and gas industry. All reference data, calculations and the glossary work without an internet connection.

REFERENCE

• Casing, tubing and drill pipe: sizes, wall thicknesses and weights (inch and metric)

• Steel grades, densities of common materials, chemical formulas

• Heat of combustion of common fuels, typical natural gas composition, SI prefixes, pH ranges

• Overview of casing strings and gas separation

CALCULATIONS

• Pipe capacity and annular volume

• Open-end and close-end pipe displacement

• Flow velocity in pipe and annulus

• Hydrostatic pressure and buoyancy factor

• Triplex and duplex pump output

• Neutral point of the drill string

• Specific gravity to mud weight, psi to bar, °C to °F

Enter numbers with either a decimal point or a comma.…

From the developer’s store description.

For developers and the curious

The full report

The evidence, sources, measurements and versions behind every label above.

Findings and evidence

Not yet tested
Not yet tested. No analysis has been published for this app. A missing label is not a clean bill of health.

What reviewers report

No review coverage

No review analysis published for this app.

Measurements

2 measured · 6 not assessed

“Not assessed” means we could not measure it. It is never a zero and never a pass.

From store data and reviews

Developer replies to reviews
Not assessed
Fewer than 50 reviews scanned — too few to state a rate
Price in the store description
The store description doesn’t list prices (most don’t)
Cancelling, in the store description
The store description doesn’t say how to cancel (most don’t)
Themes reported by reviewers
Not assessed
This app's reviews have not been assessed yet
Five-star share of ratings
Not assessed
No rating histogram has been captured for this app

In the app package we scanned

No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.

Sensitive permissions
Not assessed
No package has been scanned for this app
Analytics or tracking SDKs in the scanned package
Not assessed
No package has been scanned for this app
Advertising SDKs in the scanned package
Not assessed
No package has been scanned for this app
How we know

Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured

Versions and dates analysed

Not yet tested

Not yet tested. No analysis has been run for this app, so there is no version or date to report.

Store update history

Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.

App Store

Version 2.5 · 2026-10-20
Version 2.5 brings metric units, faster navigation and a more comfortable calculator screen. UNITS • Choose US Oilfield, Metric (bar, SG) or SI (kPa, kg/m³) units on first launch. • Tap the unit next to any value to change it — the choice applies to all calculators. • Values you have entered are converted automatically when you switch units. • Kill mud weight is rounded up in your unit: 0.1 ppg, 0.01 SG or 10 kg/m³. NAVIGATION • Search across all calculators and tables — including values inside tables, such as a steel grade or a pipe size. • Star calculators and tables to keep them in Favorites; recently opened items appear on top. • Calculators and reference tables are grouped into…

Shortened here; the full notes are on the store listing.

Assessment record

Status
Not yet tested
App identifier
oil-and-gas-reference
Sources used
None recorded
Reviews read
None recorded
Package examined
No package scan
Human inspection
Not completed
How we know
Measurement vocabulary
1.4

Store facts

App Store

What the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.

App Store

Store rating
Not supplied
Version
2.5
Updated
20 Oct 2026
Price
$1.99
Age rating
4+
Size
2 MB
Open in App Store
Developer
Yurii Sushko
Category
Education
Listing price
$1.99

No itemized purchase list is available for this listing.

Method and limits

What this report can and cannot show

What a missing label means

Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.

Limits of this report

  • A package scan is static. It identifies code and text in one Android build. It does not measure a live ad session, test a deletion request, or count the steps needed to cancel.
  • Reviews keep their sample. A review-only charge shows distinct reviewers, the share and the sample size, and is published only once it clears that label’s published threshold. Calibration labels are machine-drafted and not yet confirmed by a person.
  • Not assessed is a state. It is never a zero and never a pass.
  • A missing label is not a clean bill of health. It means the evidence did not support one, not that the app is problem-free.
Not yet human-reviewed. A human review gives an app hands-on, recorded measurements. None has been run for this app. Hands-on inspections are not yet open.
Review thresholds Read the methodology For developers

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