Oilcalcs Downloads & RevenueOilcalcs · App Store
Oilcalcs is #4 in Business Paid in South Korea and charting in 7 of 30 countries we track.
Updated 8 Nov 2026 · rankings refresh through the day
24 Sep 2026Full timeline · 22 events
- 📈Oilcalcs entered the top 10Top Paid · Business · IN
- 📈Oilcalcs new best rank in the overall chart: #80Top Paid · All Apps · ID
- 📈Oilcalcs charting in a new countryPhilippines
- 📈Oilcalcs charting in a new countryTurkey
- 📈Oilcalcs hit #1Top Paid · Business · ID
- 📈Oilcalcs new best rank in the overall chart: #98Top Paid · All Apps · ID
- 📈Oilcalcs entered the top 100 in 2 chartsTop Paid · All Apps · ID · Top Grossing · Business · ID
- 📈Oilcalcs entered the top 10Top Paid · Business · ID
- 📈Oilcalcs entered the top 10Top Paid · Business · AE
- 📈Oilcalcs charting in a new countryVietnam
- 📈Oilcalcs entered the top 100Top Paid · Business · US
- 📈Oilcalcs charting in a new countryUnited States
- 📈Oilcalcs entered the top 100Top Paid · Business · RU
- 📈Oilcalcs entered the top 10Top Paid · Business · CN
- 📈Oilcalcs charting in a new countrySaudi Arabia
- 📈Oilcalcs entered the top 10Top Paid · Business · KR
- 📈Oilcalcs entered the top 100Top Grossing · Business · KR
- 📈Oilcalcs charting in a new countryRussia
- 🆕Oilcalcs first spotted by AppInsider#53 in Top Paid · Business · India
- 📦Oilcalcs version 1.7.2Bugfixes and performance improvements.
- 🆕Oilcalcs released on the App Store
Collected from the stores by AppInsider since we first spotted the app. Dates are when we saw each change.
Business PaidOilcalcs at a glance
AI summary written from our chart and store data, 2026-11-07. It can be wrong: check the numbers above.
Oilcalcs is a specialized calculator for oil and gas professionals that performs complex volume, weight, and density conversions using ASTM tables. The app holds strong positions in the Business Paid category in India (#3) and Indonesia (#3), with moderate traction in South Korea (#43) and the UAE (#71).
Similar apps: Petroleum Calculator, Oil & Gas Unit Converter, API Gravity Calculator
Oilcalcs on the App Store
App details
App privacy Measured
Oilcalcs declares it collects no data at all — the rarest and most private label on the App Store.
As declared by the developer on the App Store — Apple requires every app to publish this label. We track changes over time.
Oilcalcs downloads
Worldwide, per day, and installs to date. The band is open; the exact number is free with an account.
How this is calculated
Where Oilcalcs's downloads come from Modelled
Last 30 days: organic search, browsing the store, features and paid ads.
Active users
All platforms, worldwide. Free with an account.
Retention · share of new users still active
Time spent · per daily user
How this is calculated
Where it ranks now
Every top chart it appears in across 30 countries.
| Country | Charts | Rank |
|---|---|---|
| South Korea | BusinessPaid | #4 |
 Indonesia | BusinessPaid | #3 |
| India | BusinessPaid | #8 |
| South Korea | BusinessGrossing | #86 |
 China | BusinessPaid | #140 |
 United Arab Emirates | BusinessPaid | #70 |
 Italy | BusinessPaid | #168 |
 Saudi Arabia | BusinessPaid | #197 |
Apps near Oilcalcs on the chart
Business Paid, around #4.
Ratings
App Store, worldwide.
Review momentum
ⓘ How we measure thisReview momentum (0-100) blends how fast the app collects ratings compared with other apps in its category (60%), whether that pace is speeding up (25%) and what recent raters give it (15%; recent stars well below lifetime pull it down). Ratings counts are read daily. A jump usually means a launch, a feature, ads or a new review prompt.
What users say about Oilcalcs
From recent reviews.
About Oilcalcs
Now optimized for iOS 26.
Newly added features:
- Calculator for Aromatics
- Added the following tables to the oil conversion screen: table 4, 8, 9, 10, 11, 12, 13, 14, 52, 56, 57, 58
- Added a field for density correction in the main calculator (and quantity editor) for the calculation of special applications in case a thermal expansion coefficient is not available
- Viscosity / pour point / flash point blender
- LNG density calculator
- Viscosity / Temperature calculator
- Density data for both the LPG and LNG density calculator are stored in the phone for easy retrieval
The app uses the ASTM tables / formulas to calculate weights and volumes based on entered density15, density20, relative density or API, observed volume, pressure and temperature, and calculates the following:
- Volume correction factor (to number of decimals of your own choice or as set by table Version)
- Metric tons (vacuum)
- Metric tons (air)
- GSV (M3 @15)
- BBLS (@60)
- Longtons
- Gallons
OilCalcs contains both ASTM 1980 and ASTM 2009 tables as well as the ASTM 1952 version of LPG Table 54, and users can select which table to use in the settings screen. Users can also select whether they want to calculate using SI Metric units or Imperial units.
Precision for VCF, GSV, MTons, LTons and Bbls can be changed using the settings screen. Settings are saved in the app so that when you use the app next time it will calculate with your chosen settings.
Densities can be entered in the following formats which are automatically recognized:
e.g 0.9664 / 966.4 / 9664
The app can calculate for crude oil, black and white products, lubrication oils and special applications, and input can be changed between density in vacuum at 15 and 20 deg C/ API / relative density / observed, and degrees Celsius / Fahrenheit by touching the applicable buttons.
The user has the choice to calculate using as input observed M3 / M3 at 15 / observed Barrels / Barrels 60 / Metric tons air/vac / Ltons / Gallons.
The user can also calculate weights of LPG / NGL, using either density @ 15C, relative density @60F, observed density or density @ 20C.
Aside from the conversion screen with conversions between API, observed density, density 15, density 20 and relative density, there is also a screen with conversions used in LPG / NGL.
For products, lube oils and crude there are two tools for calculating final density when blending two components: one tool that calculates the blend after loading the 2nd component, and another tool that lets the user choose the two components and advises which component to load first, based on density 15C or API 60F and actual temperature of the components. Both tools also calculate volume shrinkage due to blending.
A utility has been included that enables the user to export data from the calculator screen directly into a database for future reference. The same utility can b
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