Comparison

Phymetrix Calculator vs Instrument Toolbox

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

Head to head
About

Phymetrix Calculator

This utility app simplifies moisture calculations by converting between various units and determining dew points and partial water vapor pressures. It's pre-programmed with essential scientific equations for common gases, making complex calculations straightforward.

Highlights
  • Moisture unit conversion
  • Dew point calculation
  • Partial water vapor pressure calculation
  • Pre-programmed scientific equations
  • Supports common gases
  • User-friendly interface
Features
Read full description

The Phymetrix Moisture Calculator will allow you to quickly convert between different moisture concentration units as well as easily obtain dew points and partial water vapor pressures at different total pressures. The Dew Point Calculator is pre-programmed with all the pertinent dew point equations from Physical Chemistry and Thermodynamics and the molecular weights of the most commonly used gases. All you have to do is plug in your numbers; science made simple! Keywords: moisture units conversion calculator, dewpoint units conversion calculator, unit conversion, moisture calculator, dew point calculator, moisture conversion, ppm to dew point conversion calculator, ppm/dewpoint to lbs-H2O conversion calculator

About

Instrument Toolbox

A professional calculator designed for industrial control, automation, and instrumentation engineers. It offers quick conversions and calculations for gas concentration, units, steam properties, flange levels, and pipeline flow. Ideal for both field debugging and engineering design.

Highlights
  • PPM to mg/m³ conversion with compensation
  • Industrial unit conversion (pressure, volume, temp, etc.)
  • Saturated steam pressure and density calculator
  • Flange level migration calculations
  • Pipeline flow and velocity calculator
  • Real-time calculation results
Features
Read full description

Industrial Control & Instrumentation Toolbox - Your Smart Industrial Calculator A professional calculation toolbox designed for industrial control, automation, and instrumentation engineers. Whether for field debugging or engineering design, it helps you quickly complete various professional calculations. Core Features: PPM to mg/m³ Converter: Gas concentration unit conversion, supports custom molecular weight, built-in quick selection of common gas molecular weights, with environmental temperature and pressure compensation Unit Converter: Covers easy conversion of industrial measurement units including: Pressure (8 units including MPa, kPa, bar, psi, etc.) Volume Temperature Length Mass Saturated Steam Calculator: Input temperature to obtain saturated steam pressure, or input pressure to calculate saturated steam density, meeting steam system design requirements Flange Level Migration: Supports single/dual flange level calculations, with inputs for medium density, flange distance, and other parameters for precise level measurement calibration Pipeline Flow & Velocity Calculator: Applicable for both gas and liquid media, integrates velocity calculation, flow calculation, and diameter calculation, incorporating temperature, pressure, and other operating conditions Key Features: Clean and intuitive interface, easy operation Real-time calculation results Supports standard and operating condition conversions Built-in reference values like standard atmospheric pressure Suitable for both field engineering and design office scenarios This app is an essential professional tool for industrial automation, significantly improving engineering calculation efficiency. Target Users: Automation Engineers, Instrumentation Engineers, Process Engineers, Equipment Engineers, and other industrial control professionals.

Screenshots

Phymetrix Calculator4 screens
Instrument Toolbox4 screens

Verdict

The call

The clearest difference is price: Phymetrix Calculator at Free against Instrument Toolbox's $1.99. Instrument Toolbox's advantage is update cadence (weekly vs every 52 months). On review sentiment, ads, 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

Phymetrix Calculator is free to download; Instrument Toolbox costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Phymetrix Calculator ships an update every 52 months, Instrument Toolbox weekly. The most recent releases landed on October 6, 2026 and October 9, 2026 respectively.

Scorecard3 real differences · 7 level
Phymetrix Calculator versus Instrument Toolbox: the parameters behind the verdict, then further details
ParameterPhymetrix CalculatorInstrument Toolbox
PriceFree — better$1.99
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings2 — better—
Update frequencyEvery 52 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.013.0 — better
Further details — not scored
Size1 MB8 MB
Age rating4+4+
DeveloperAlexander Bedrossian立娜 王

Customer experience

Phymetrix Calculator

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

Instrument Toolbox

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Phymetrix Calculator

No in-app purchases

None

Instrument Toolbox

No in-app purchases

Questions

Is Phymetrix Calculator free?
Phymetrix Calculator is free to download, with no in-app purchases.
Is Instrument Toolbox free?
Instrument Toolbox costs $1.99, with no in-app purchases.
Do Phymetrix Calculator or Instrument Toolbox have ads?
Neither Phymetrix Calculator nor Instrument Toolbox shows ads.
Which is updated more often, Phymetrix Calculator or Instrument Toolbox?
Phymetrix Calculator ships an update every 52 months, and Instrument Toolbox weekly. Most recently, Phymetrix Calculator was updated on October 6, 2026 and Instrument Toolbox on October 9, 2026.

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