Comparison

PT100 Calculator vs LTH Discover

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

Head to head
About

PT100 Calculator

Features
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PT100 Calculator is a fast, reliable tool for converting temperature and resistance values for PT100 and PT1000 RTD sensors. Built for electricians, engineers, and technicians, it makes on-site checks quick and effortless. Whether you’re fault finding, testing sensors, or verifying readings, PT100 Calculator gives you instant, accurate results without needing internet access. == Features == + Convert Temperature to Resistance (Ω) + Convert Resistance (Ω) to Temperature + Supports PT100 and PT1000 + Works in Celsius and Fahrenheit + Clean, fast interface designed for real-world use + Fully offline, no connection required + Built-in lookup table for quick reference + Copy results instantly == Designed for the job == No clutter. No accounts. No distractions. Just open the app, enter your value, and get the answer immediately. Perfect for: + Electricians + HVAC engineers + Industrial maintenance + Panel builders + Apprentices and trainees == Accurate and reliable == Uses standard RTD characteristics based on IEC specifications to ensure consistent and dependable results. PT100 Calculator is the simplest way to convert RTD readings on-site.

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 • DCU18 • DEU18 • DMU18 • DOU18 • DPU18 • DTU18

Screenshots

PT100 Calculator4 screens
LTH Discover4 screens

Verdict

The call

The clearest difference is price: LTH Discover at Free against PT100 Calculator's $2.99. LTH Discover also leads on iOS requirement (15.6 vs 17.0). PT100 Calculator's advantage is update cadence (monthly vs every 5 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

LTH Discover is free to download; PT100 Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

PT100 Calculator ships an update monthly, LTH Discover every 5 months. The most recent releases landed on September 18, 2026 and October 25, 2026 respectively.

Scorecard3 real differences · 3 level
PT100 Calculator versus LTH Discover: the parameters behind the verdict, then further details
ParameterPT100 CalculatorLTH Discover
Price$2.99Free — better
Update frequencyMonthly — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.015.6 — better
Further details — not scored
Size3 MB40 MB
Age rating4+4+
DeveloperWilliam NewcombeL.T.H. Electronics Limited

In-app purchases

None

PT100 Calculator

No in-app purchases

None

LTH Discover

No in-app purchases

Questions

Is PT100 Calculator free?
PT100 Calculator costs $2.99, with no in-app purchases.
Is LTH Discover free?
LTH Discover is free to download, with no in-app purchases.
Do PT100 Calculator or LTH Discover have ads?
Neither PT100 Calculator nor LTH Discover shows ads.
Which is updated more often, PT100 Calculator or LTH Discover?
PT100 Calculator ships an update monthly, and LTH Discover every 5 months. Most recently, PT100 Calculator was updated on September 18, 2026 and LTH Discover on October 25, 2026.

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