Comparison

Instrument Toolbox vs Simple Zakat

Price, ratings, monetisation and update history for both apps, side by side — 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/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.

About

Simple Zakat

Calculate your annual Zakat accurately using authentic Islamic principles. Track payments across multiple Hijri years and maintain complete financial privacy with local data storage. Offers smart reminders and multi-currency support for a seamless experience.

Highlights
  • Accurate Zakat calculation
  • Hijri calendar integration
  • Payment tracking
  • Complete privacy (local storage)
  • Smart reminders
  • Multi-currency support
  • Offline functionality
Read full description

Fulfill Your Zakat Obligation with Confidence Simple Zakat is the most intuitive and privacy-focused Islamic Zakat calculator. Calculate your annual Zakat accurately using authentic Islamic principles, track your payments across multiple Hijri years, and maintain complete financial privacy—all without creating an account. FEATURES • Accurate Zakat Calculation – Calculate based on authentic Islamic methodology with support for all asset types  • Hijri Calendar Integration – Manage calculations by Hijri year with automatic date conversion and multi-year tracking  • Payment Tracking – Record payments with recipient details and monitor progress with visual indicators  • Complete Privacy – All data encrypted and stored locally on your device. No account required, no data transmission  • Smart Reminders – Never miss your Zakat due date with customizable notifications that work offline  • Beautiful Design – Clean interface with dark/light mode, smooth animations, and easy-to-read financial data  • Multi-Currency Support – 150+ global currencies with automatic formatting  • PDF and CSV Import & Export – Generate professional reports to share, print, or backup your calculations • 100% Offline – Works completely without internet. Fast, private, and always available Unlike other Zakat calculators, Simple Zakat prioritizes your privacy and gives you complete control over your financial data. There are no subscriptions, no hidden fees, and no data collection. Everything happens on your device, ensuring your sensitive financial information remains private and secure. Our calculation methodology is based on authentic Islamic scholarship, ensuring your Zakat calculations are accurate and religiously sound. Join thousands of Muslims worldwide who trust Simple Zakat for their annual Zakat calculations. Download now and simplify your Zakat journey.

Screenshots

Instrument Toolbox4 screens
Simple Zakat4 screens

Verdict

The call

The clearest difference is price: Simple Zakat at Free against Instrument Toolbox's $1.99. Instrument Toolbox's advantage is update cadence (weekly vs fortnightly). 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

Simple Zakat 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

Instrument Toolbox ships an update weekly, Simple Zakat fortnightly. The most recent releases landed on November 8, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
Instrument Toolbox versus Simple Zakat: the parameters behind the verdict, then further details
ParameterInstrument ToolboxSimple Zakat
Price$1.99Free — better
Rating—5.0 (4 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—4 — better
Update frequencyWeekly — betterFortnightly
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS13.013.0
Further details — not scored
Size8 MB35 MB
Age rating4+17+
Developer立娜 王Syed Muhammad Talha

Customer experience

Instrument Toolbox

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

Simple Zakat

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Instrument Toolbox

No in-app purchases

None

Simple Zakat

No in-app purchases

Questions

Is Instrument Toolbox free?
Instrument Toolbox costs $1.99, with no in-app purchases.
Is Simple Zakat free?
Simple Zakat is free to download, with no in-app purchases.
Do Instrument Toolbox or Simple Zakat have ads?
Neither Instrument Toolbox nor Simple Zakat shows ads.
Which is updated more often, Instrument Toolbox or Simple Zakat?
Instrument Toolbox ships an update weekly, and Simple Zakat fortnightly. Most recently, Instrument Toolbox was updated on November 8, 2026 and Simple Zakat on October 30, 2026.

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