Comparison

Panecal Scientific Calculator vs Drillstring Toolbox

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

Head to head
About

Panecal Scientific Calculator

This app functions as a scientific calculator, enabling users to input and edit complex formulas with ease. It supports formula history, variable memory, and various number system conversions for accurate calculations.

Highlights
  • Formula editing with cursor and swipe
  • Reuse past formulas
  • Variable memory for calculations
  • Binary, octal, decimal, hexadecimal conversion
  • M+/M- memory functions
  • Angle unit settings (DEG, RAD, GRAD)
Features
Read full description

[Description] Panecal is a scientific calculator app that lets you display and modify formulas. By allowing you to review your formulas as you type, it helps prevent typos and calculation errors. You can also reuse past formulas and utilize variable memory to recalculate by changing only specific values. The on-screen cursor allows you to quickly navigate to where you want to edit by tapping or using the arrow keys. Featuring a powerful, flexible, and intuitive user interface, the app also supports swiping to scroll through formulas and long-pressing to copy and paste. [Features] - Recalculate easily using past formulas - Effortless editing with cursor navigation and screen swiping - Copy and paste formula text - History log for both formulas and calculation results - Binary, octal, decimal, and hexadecimal calculation and conversion (Up to 32-bit) - M+/M- memory functions and variable memory (A–F) - Support for arithmetic operations, inverse trigonometric functions, logarithmic functions, power/root functions, factorials, absolute values, percentage calculations, modulo operations, and polar/cartesian coordinate conversion - Multiple angle units (DEG, RAD, GRAD) -Multiple display formats: Normal (standard), Fix (fixed decimal), Sci (significant figures), and Eng (engineering notation in multiples of 3) -Customizable decimal point characters and grouping separators [Disclaimer] Please note that Appsys accepts no responsibility for any damages, lost profits, or claims from third parties arising from the use of this software.

About

Drillstring Toolbox

This utility app calculates drill-stem load capacities based on API connections and sizes. It also provides makeup torque and tensile capacity, as well as tensile and torsion capacities for drill pipe tubes.

Highlights
  • Drill-stem load capacity calculation
  • API connection selection
  • Makeup torque calculation
  • Tensile capacity calculation
  • Drill pipe tube capacities
Features
Read full description

Drillstring Toolbox is a free calculator from Standard DS-1 that gives you the drill-stem load capacities you need! You can choose an API connection (along with the size you're interested in) to find its recommended makeup torque and tensile capacity. Tap the "Tube" tab to find the tensile and torsion capacities for drill pipe tubes as well!

Screenshots

Panecal Scientific Calculator4 screens
Drillstring Toolbox2 screens

Verdict

The call

The clearest difference is rating: Panecal Scientific Calculator at 4.8 against Drillstring Toolbox's 3.3. Panecal Scientific Calculator also leads on update cadence (every 2 months vs every 39 months) and ratings volume (1.9K vs 3). Drillstring Toolbox's advantage is ads (none vs shown) and review sentiment (100% vs 76%). On price, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Panecal Scientific Calculator holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: Panecal Scientific Calculator has 1.9K ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 76% of Panecal Scientific Calculator's written reviews are positive against 100% of Drillstring Toolbox's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Panecal Scientific Calculator ships an update every 2 months, Drillstring Toolbox every 39 months. The most recent releases landed on September 24, 2026 and September 5, 2026 respectively.

Scorecard7 real differences · 3 level
Panecal Scientific Calculator versus Drillstring Toolbox: the parameters behind the verdict, then further details
ParameterPanecal Scientific CalculatorDrillstring Toolbox
PriceFreeFree
Rating4.8 (1.9K ratings) — better3.3 (3 ratings)
Positive reviews75.8% of reviews100.0% of reviews — better
Number of ratings1.9K — better3
Update frequencyEvery 2 months — betterEvery 39 months
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supportedFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better14.0
Further details — not scored
Size34 MB1 MB
Age rating4+4+
DeveloperNoriyasu KutsuzawaBureau Veritas North America, Inc.

Customer experience

Panecal Scientific Calculator

All ratings1,947 ratings
Positive94.9%
Neutral2.3%
Negative2.8%
Written reviews670 reviews
Positive75.8%
Neutral7.0%
Negative17.2%

Drillstring Toolbox

All ratings3 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

Panecal Scientific Calculator

Reported bugs

3 issues
  • Inability to switch back from Bin mode
  • Calculation history not scrolling properly
  • Inconsistent behavior with certain operations

Requested features

5 requests
  • Unit conversion tools
  • Customizable font and icon
  • Ability to rotate screen
  • More advanced programming features
  • Improved order of operations handling

Drillstring Toolbox

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Panecal Scientific Calculator

No in-app purchases

None

Drillstring Toolbox

No in-app purchases

Questions

Is Panecal Scientific Calculator free?
Panecal Scientific Calculator is free to download, with no in-app purchases.
Is Drillstring Toolbox free?
Drillstring Toolbox is free to download, with no in-app purchases.
Which has better reviews, Panecal Scientific Calculator or Drillstring Toolbox?
Panecal Scientific Calculator is rated higher. Panecal Scientific Calculator averages 4.8 out of 5 from 1.9K ratings, while Drillstring Toolbox averages 3.3 from 3 ratings.
Do Panecal Scientific Calculator or Drillstring Toolbox have ads?
Panecal Scientific Calculator shows ads; Drillstring Toolbox does not.
Which is updated more often, Panecal Scientific Calculator or Drillstring Toolbox?
Panecal Scientific Calculator ships an update every 2 months, and Drillstring Toolbox every 39 months. Most recently, Panecal Scientific Calculator was updated on September 24, 2026 and Drillstring Toolbox on September 5, 2026.

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