Comparison

Instrument Toolbox vs My LoopCal

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

Head to head
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/mยณ 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/mยณ 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.

About

My LoopCal

Features
Read full description

LoopCal is a fast, fully offline field toolkit for instrumentation and calibration technicians who work with 4โ€“20 mA current loops and analog process signals. CONVERT INSTANTLY โ€ข 4โ€“20 mA, 0โ€“20 mA, 0โ€“10 V, 1โ€“5 V, and your own custom signal endpoints โ€ข Direct-acting and reverse-acting ranges โ€ข Linear and square-root (flow) transfer functions โ€ข Engineering ranges with any unit, including negative and offset spans โ€ข Percent, signal, and engineering values update as you type, with the substituted formula shown VERIFY AND DOCUMENT โ€ข Three-point, five-point, and custom 2โ€“21-point checks โ€ข As-found and as-left runs with immediate error and pass/fail โ€ข Percent-of-span, signal-unit, or engineering-unit tolerance basis โ€ข Worst-point and maximum-error summaries LOOP POWER MATH โ€ข Shunt resistor voltage drop โ€ข Required supply voltage and remaining compliance โ€ข Maximum loop and wire resistance ORGANIZE AND SHARE โ€ข Save instruments, ranges, and history โ€ข Due-date reminders โ€ข PDF and CSV field worksheets with your company identity PRIVATE BY DESIGN โ€ข Everything runs on your device. No account, no ads, no tracking, no network. LoopCal is a calculation aid and field worksheet โ€” not a calibrator, an accredited calibration service, or a replacement for manufacturer procedures. Always follow site lockout/tagout, operations authorization, device manuals, and approved procedures. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Instrument Toolbox4 screens
My LoopCal4 screens

Verdict

The call

The clearest difference is price: My LoopCal at Free against Instrument Toolbox's $1.99. Instrument Toolbox's advantage is in-app purchases (none vs 3) and update cadence (weekly vs monthly). On ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

My LoopCal is free to download; Instrument Toolbox costs $1.99 up front. My LoopCal sells 3 in-app purchases, starting at $1.99 per month. Instrument Toolbox asks for nothing beyond the download.

UpkeepUpdate frequency

Instrument Toolbox ships an update weekly, My LoopCal monthly. The most recent releases landed on September 23, 2026 and October 4, 2026 respectively.

Scorecard4 real differences ยท 4 level
Instrument Toolbox versus My LoopCal: the parameters behind the verdict, then further details
ParameterInstrument ToolboxMy LoopCal
Price$1.99Free โ€” better
Positive reviews100.0% of reviewsโ€”
Update frequencyWeekly โ€” betterMonthly
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationPaidโ€”
DevicesiPhone, iPad, iPod โ€” betteriPhone, iPad
Requires iOS13.0 โ€” better17.0
Further details โ€” not scored
Size8 MB2 MB
Age rating4+4+
Developer็ซ‹ๅจœ ็Ž‹Neobile LLC

In-app purchases

None

Instrument Toolbox

No in-app purchases

3 purchases

My LoopCal

Subscriptions2
  • Monthly$1.991 Month
  • Annual$4.991 Year
One-time1
  • Lifetime$6.99

Questions

Is Instrument Toolbox free?
Instrument Toolbox costs $1.99, with no in-app purchases.
Is My LoopCal free?
My LoopCal is free to download, with in-app purchases available.
Do Instrument Toolbox or My LoopCal have ads?
Neither Instrument Toolbox nor My LoopCal shows ads.
Which is updated more often, Instrument Toolbox or My LoopCal?
Instrument Toolbox ships an update weekly, and My LoopCal monthly. Most recently, Instrument Toolbox was updated on September 23, 2026 and My LoopCal on October 4, 2026.

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