Comparison

LTH Discover vs Instrument Toolbox

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

Head to head
About

LTH Discover

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LTH Discover from LTH Electronics provides an easy and intuitive means of wirelessly connecting, via Bluetooth, to LTH Electronics’ range of liquid process control instrumentation. Features include: Live Discovery Screen – Allows for a quick overview of any nearby instruments, showing their current readings and status. Measurement Screen – Shows live measurement readings of the process parameter along with instrument output values and status. Configuration Menus – Easily set up the instrument’s measurement and control parameters. Features a secure password system that allows for viewing while not allowing alterations unless the instrument’s unique password is known. Calibration – Intuitive system that guides the user through each step of their sensor’s calibration procedure. Errors – Detailed error system with inbuilt guides to help the user solve instrument problems. Save and Restore – Experience faster commissioning times with our advanced save and restore system, designed to effortlessly duplicate instrument setups. Firmware Upgrade – Upgrade connected instruments' firmware for performance and feature enhancements. List of supported devices β€’ DCU18 β€’ DEU18 β€’ DMU18 β€’ DOU18 β€’ DPU18 β€’ DTU18

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/mΒ³ 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
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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/mΒ³ 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

LTH Discover4 screens
Instrument Toolbox4 screens

Verdict

The call

The clearest difference is price: LTH Discover at Free against Instrument Toolbox's $1.99. Instrument Toolbox's advantage is update cadence (weekly vs every 3 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

LTH Discover 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

LTH Discover ships an update every 3 months, Instrument Toolbox weekly. The most recent releases landed on September 8, 2026 and September 23, 2026 respectively.

Scorecard2 real differences Β· 6 level
LTH Discover versus Instrument Toolbox: the parameters behind the verdict, then further details
ParameterLTH DiscoverInstrument Toolbox
PriceFree β€” better$1.99
Positive reviewsβ€”100.0% of reviews
Update frequencyEvery 3 monthsWeekly β€” better
AdsNoNo
In-app purchasesNoNo
Monetizationβ€”Paid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.213.0 β€” better
Further details β€” not scored
Size44 MB8 MB
Age rating4+4+
DeveloperL.T.H. Electronics Limitedη«‹ε¨œ ηŽ‹

In-app purchases

None

LTH Discover

No in-app purchases

None

Instrument Toolbox

No in-app purchases

Questions

Is LTH Discover free?
LTH Discover is free to download, with no in-app purchases.
Is Instrument Toolbox free?
Instrument Toolbox costs $1.99, with no in-app purchases.
Do LTH Discover or Instrument Toolbox have ads?
Neither LTH Discover nor Instrument Toolbox shows ads.
Which is updated more often, LTH Discover or Instrument Toolbox?
LTH Discover ships an update every 3 months, and Instrument Toolbox weekly. Most recently, LTH Discover was updated on September 8, 2026 and Instrument Toolbox on September 23, 2026.

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