Comparison

数字空压站 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

数字空压站

Features
Read full description

空压站和设备数据监控移动化,客户可以随时随地的远程查看空压站及设备的运行数据、故障报警等信息,进行空压站的数据分析,为空压站提供安全可靠的连接通信能力

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

数字空压站4 screens
Instrument Toolbox4 screens

Verdict

The call

The clearest difference is price: 数字空压站 at Free against Instrument Toolbox's $1.99. 数字空压站 also leads on iOS requirement (11.0 vs 13.0). Instrument Toolbox's advantage is update cadence (weekly vs every 2 months). On 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

数字空压站 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

数字空压站 ships an update every 2 months, Instrument Toolbox weekly. The most recent releases landed on September 18, 2026 and September 23, 2026 respectively.

Scorecard3 real differences · 5 level
数字空压站 versus Instrument Toolbox: the parameters behind the verdict, then further details
Parameter数字空压站Instrument Toolbox
PriceFree — better$1.99
Positive reviews—100.0% of reviews
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size76 MB8 MB
Age rating4+4+
Developer苏州汇川技术有限公司立娜 王

In-app purchases

None

数字空压站

No in-app purchases

None

Instrument Toolbox

No in-app purchases

Questions

Is 数字空压站 free?
数字空压站 is free to download, with no in-app purchases.
Is Instrument Toolbox free?
Instrument Toolbox costs $1.99, with no in-app purchases.
Do 数字空压站 or Instrument Toolbox have ads?
Neither 数字空压站 nor Instrument Toolbox shows ads.
Which is updated more often, 数字空压站 or Instrument Toolbox?
数字空压站 ships an update every 2 months, and Instrument Toolbox weekly. Most recently, 数字空压站 was updated on September 18, 2026 and Instrument Toolbox on September 23, 2026.

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