PT100 Calculator vs TC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PT100 Calculator
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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.
TC
This utility app provides quick and accurate conversions between resistance, potential, and temperature for various thermocouples and RTDs. It supports offline use, temperature recording with export, and offers an intuitive interface for field technicians and engineers.
- Thermocouple and RTD conversion
- Supports multiple sensor types
- Offline functionality
- Temperature recording and charting
- Export data to Excel
- Intuitive user interface
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This software is a user-friendly, efficient, and comprehensive tool designed for field technicians, engineers, and programmers. It allows for quick and easy conversion between resistance potential and temperature, suitable for various common temperature sensors. This application simplifies the temperature measurement process, providing a practical solution for professionals. Data support: Supports thermocouple types B, E, J, K, N, R, S, T, C, D, G with all voltages measured in millivolts (mV). The conversion formulas used are derived from NIST thermocouple tables and coefficients. Supports bi-directional query for PT1000, PT100, PT500, PT800, PT10, CU50, CU100, Ni100, Ni120, Ni1000 RTDs (ITS-90). Temperature recording: Supports temperature recording and temperature curve display, with one-click export of records and charts to Excel, facilitating on-site data entry and analysis. Fast and accurate: Instantly obtain the temperature coefficients and performance curves you need. Offline availability: Can be queried in field environments without network access. Intuitive interface: Clean design, easy to operate. Regular updates: Always maintains the latest industry standards. Whether you're an industrial automation engineer, process control expert, factory instrument engineer, or a student of temperature measurement, TC-RTD is an indispensable assistant for you.
Screenshots
Verdict
The clearest difference is update cadence: PT100 Calculator at monthly against TC's every 3 months. TC's advantage is price ($1.99 vs $2.99) and iOS requirement (13.0 vs 17.0). 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
PT100 Calculator costs $2.99 and TC $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
PT100 Calculator ships an update monthly, TC every 3 months. The most recent releases landed on September 18, 2026 and October 19, 2026 respectively.
| Parameter | PT100 Calculator | TC |
|---|---|---|
| Price | $2.99 | $1.99 — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | William Newcombe | 立娜 王 |
In-app purchases
PT100 Calculator
No in-app purchases
TC
No in-app purchases









