Comparison

Panecal Plus Sci. Calculator vs Volumetric Method

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

Head to head
About

Panecal Plus Sci. Calculator

This app functions as a scientific calculator with a multiline editable display. It allows users to view and modify formulas as they are entered, preventing errors. Past calculations can be reused, and variable memory enables efficient recalculations.

Highlights
  • Multiline editable formulas
  • Re-calculation of past formulas
  • Cursor-based editing and swipe navigation
  • Copy and paste formulas
  • Formula and answer history
  • Number base conversion (binary, octal, decimal, hex)
  • Variable memory
Features
Read full description

[Description] Panecal is a scientific calculator app that allows you to display and modify formulas. It allows you to enter formulas while checking them, which prevents you from typing incorrectly or making calculation errors. It is also possible to reuse past formulas and use variable memory to change only certain values to calculate them.  The display shows the cursor, and you can tap or press the arrow keys to quickly navigate to where you want to edit. It has a powerful, flexible and intuitive user interface with support for swiping to scroll through formulas and long-tap to copy and paste.   [Features] - Re-calculation by using past formula - Easy editing by using a cursor operation and swipe the screen - Copy and paste formulas text - Formulas history and answers history table - Binary numbers, octal numbers, decimal numbers, hexadecimal numbers calculation and conversion (Max.32bits) - M+/M- memory functions and variable(A-F) memory - Arithmetic operations, inverse trigonometric functions, logarithmic functions, power functions, power root functions, factorials, absolute values, percent calculations, modulo calculation, polar and cartesian coordinate conversion - Angle units (DEG, RAD, GRAD) - Result format with Normal(standard), Fix (fixed decimal mode), Sci (significant figures), and Eng (index is in multiples of 3) - Decimal point character and grouping separator settings [Disclaimer] Please note in advance that Appsys is not responsible for any damage or lost profits caused by the use of this software, or any claims from third parties.

About

Volumetric Method

Features
Read full description

This app is designed for both iPhone and iPad. This application uses the basic calculations of the Volumetric Method to control oil wells after the occurrence of kick during drilling operations on landing rigs (Onshore). - Starting on version 1.1, this app is optimized for horizontal and directional wells. It imports data files from our apps: (Driling Hydraulics, Drilling Simulators, Kick Tolerance, Kick Game, MPD Simulator and Well Control Simulators) available for sale in our portfolio on the App Store. It is can be applied on the oilfield and also help in the understanding of the Volumetric Method of well control. This app was developed based on existing spreadsheets. There is no comparison with any other software. Our goal was to create a low-cost application with the help of experts to share with drilling engineers, technicians, drillers, students and teachers of drilling engineering. There is no intention to replace the professional softwares. You can contribute with suggestions for improvements, correcting the translation to english, reporting bugs and spreading it to your friends. Thanks DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.

Screenshots

Panecal Plus Sci. Calculator4 screens
Volumetric Method4 screens

Verdict

The call

The clearest difference is price: Panecal Plus Sci. Calculator at $2.99 against Volumetric Method's $19.99. Panecal Plus Sci. Calculator also leads on update cadence (every 3 months vs every 38 months). On ads, in-app purchases, device support and iOS requirement 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

Panecal Plus Sci. Calculator costs $2.99 and Volumetric Method $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Panecal Plus Sci. Calculator ships an update every 3 months, Volumetric Method every 38 months. The most recent releases landed on September 26, 2026 and September 10, 2026 respectively.

Scorecard2 real differences · 8 level
Panecal Plus Sci. Calculator versus Volumetric Method: the parameters behind the verdict, then further details
ParameterPanecal Plus Sci. CalculatorVolumetric Method
Price$2.99 — better$19.99
Rating4.8 (363 ratings) — better—
Positive reviews79.3% of reviews—
Number of ratings363 — better—
Update frequencyEvery 3 months — betterEvery 38 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.011.0 — better
Further details — not scored
Size18 MB16 MB
Age rating4+4+
DeveloperNoriyasu KutsuzawaCarlos Moura

In-app purchases

None

Panecal Plus Sci. Calculator

No in-app purchases

None

Volumetric Method

No in-app purchases

Questions

Is Panecal Plus Sci. Calculator free?
Panecal Plus Sci. Calculator costs $2.99, with no in-app purchases.
Is Volumetric Method free?
Volumetric Method costs $19.99, with no in-app purchases.
Do Panecal Plus Sci. Calculator or Volumetric Method have ads?
Neither Panecal Plus Sci. Calculator nor Volumetric Method shows ads.
Which is updated more often, Panecal Plus Sci. Calculator or Volumetric Method?
Panecal Plus Sci. Calculator ships an update every 3 months, and Volumetric Method every 38 months. Most recently, Panecal Plus Sci. Calculator was updated on September 26, 2026 and Volumetric Method on September 10, 2026.

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