# ComBackups vs TC

The clearest difference is price: ComBackups at Free against TC's $1.99. TC's advantage is update cadence (every 3 months vs every 11 months). On rating, ratings volume, ads and in-app purchases there is nothing between them.

ComBackups is free to download; TC costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for ComBackups against 5.0 for TC. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

ComBackups ships an update every 11 months, TC every 3 months. The most recent releases landed on September 8, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | ComBackups | TC |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/combackups/id1506232416/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/tc-rtd-reference/id6504454500/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 11 months | **Every 3 months** |
| Monetization | **Free** | Paid |
| Size | 25 MB | 12 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Energy Technology and Control Limited](https://appshunter.io/developer/1506232205) | [立娜 王](https://appshunter.io/developer/1761096632) |

## What reviewers say

### ComBackups

[App page](https://appshunter.io/ios/app/combackups/id1506232416)

Scan QR codes generated by an ETC combustion control system to retrieve backup commissioning data. The app stores and allows emailing of these backup files directly from your iPhone. Optionally, create spreadsheets of the data in your Google account.

**Highlights:** Scan QR codes for backup data, Retrieve commissioning data files (CBU), Store and email backup files, Create Google Sheets from data, View backup files within the app

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is ComBackups free?

ComBackups is free to download, with no in-app purchases.

### Is TC free?

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

### Which has better reviews, ComBackups or TC?

ComBackups and TC are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do ComBackups or TC have ads?

Neither ComBackups nor TC shows ads.

### Which is updated more often, ComBackups or TC?

ComBackups ships an update every 11 months, and TC every 3 months. Most recently, ComBackups was updated on September 8, 2026 and TC on September 15, 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.*