# C3 Data vs myLeister

C3 Data and myLeister are too close to call on the numbers: across 7 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

C3 Data ships an update every 5 weeks, myLeister every 2 months. The most recent releases landed on August 23, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | C3 Data | myLeister |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (8 ratings)](https://appshunter.io/ios/app/c3-data/id1145515518/reviews)** | — |
| Number of ratings | **8** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 40 MB | 162 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [C3 Data](https://appshunter.io/developer/1145515517) | [Leister Technologies AG](https://appshunter.io/developer/1171016877) |

## What reviewers say

### C3 Data

[App page](https://appshunter.io/ios/app/c3-data/id1145515518)

This application helps pyrometry laboratories and heat treat plants track compliance with industry standards. It provides instant visual feedback on test results against specified criteria, supporting various data collection needs for furnaces.

**Highlights:** Nadcap and CQI-9 compliance tracking, Calibration, SAT, and TUS data collection, Instant pass/fail visual indicators, Test and instrument management, On- and offline operation, Zebra Bluetooth printer support

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

**In-app purchases:** none


### myLeister

[App page](https://appshunter.io/ios/app/myleister/id1171016878)

This app transforms your Leister devices into intelligent tools, offering real-time monitoring, recipe management, and diagnostic features. It provides a valuable overview of your equipment fleet and allows for remote configuration and quality control.

**Highlights:** Device fleet overview, Real-time Live View monitoring, Customizable welding recipes, NFC for setting transfer, Leister Quality System (LQS) reporting, Power Cord Checker tool, Unit Converter and Process Heat Formulas

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is C3 Data free?

C3 Data is free to download, with no in-app purchases.

### Is myLeister free?

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

### Do C3 Data or myLeister have ads?

Neither C3 Data nor myLeister shows ads.

### Which is updated more often, C3 Data or myLeister?

C3 Data ships an update every 5 weeks, and myLeister every 2 months. Most recently, C3 Data was updated on August 23, 2026 and myLeister on September 18, 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.*