# TC vs My LoopCal

The clearest difference is price: My LoopCal at Free against TC's $1.99. My LoopCal also leads on update cadence (every 11 days vs every 3 months) and ratings volume (3 vs 1). TC's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 3). On ads and device support there is nothing between them.

My LoopCal is free to download; TC costs $1.99 up front. My LoopCal sells 3 in-app purchases, starting at $2.99 per month. TC asks for nothing beyond the download.

TC holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

TC ships an update every 3 months, My LoopCal every 11 days. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | TC | My LoopCal |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/tc-rtd-reference/id6504454500/reviews)** | [4.3 (3 ratings)](https://appshunter.io/ios/app/my-loopcal-4-20ma-calibration/id6792422682/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 11 days** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 12 MB | 3 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [立娜 王](https://appshunter.io/developer/1761096632) | [Neobile LLC](https://appshunter.io/developer/1080490647) |

## What reviewers say

### TC

[App page](https://appshunter.io/ios/app/tc-rtd-reference/id6504454500)

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.

**Highlights:** Thermocouple and RTD conversion, Supports multiple sensor types, Offline functionality, Temperature recording and charting, Export data to Excel, Intuitive user interface

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### My LoopCal

[App page](https://appshunter.io/ios/app/my-loopcal-4-20ma-calibration/id6792422682)

Streamline 4-20mA loop checks with guided calibration worksheets and instant signal conversion. Generate PDF reports, manage instrument history, and perform loop power calculations offline. Designed for field technicians.

**Highlights:** Guided calibration worksheets (3-21 points), As-found/as-left runs with error reporting, Signal conversion (4-20mA, 0-10V, etc.), PDF and CSV report generation, Instrument history and calibration reminders, Loop power calculations, Offline functionality

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Annual | $9.99 | per year |
| Lifetime | $19.99 | one-time |


## Frequently asked questions

### Is TC free?

TC costs $1.99, with no in-app purchases.

### Is My LoopCal free?

My LoopCal is free to download, with in-app purchases available.

### Which has better reviews, TC or My LoopCal?

TC is rated higher. TC averages 5.0 out of 5 from 1 ratings, while My LoopCal averages 4.3 from 3 ratings.

### Do TC or My LoopCal have ads?

Neither TC nor My LoopCal shows ads.

### Which is updated more often, TC or My LoopCal?

TC ships an update every 3 months, and My LoopCal every 11 days. Most recently, TC was updated on October 27, 2026 and My LoopCal on October 31, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*