# C3 Data vs Watlow EZ

The clearest difference is rating: C3 Data at 4.6 against Watlow EZ's 4.0. C3 Data also leads on update cadence (every 5 weeks vs every 18 months). Watlow EZ's advantage is iOS requirement (10.0 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

C3 Data holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 8 and 15 respectively.

C3 Data ships an update every 5 weeks, Watlow EZ every 18 months. The most recent releases landed on October 7, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | C3 Data | Watlow EZ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (8 ratings)](https://appshunter.io/ios/app/c3-data/id1145515518/reviews)** | [4.0 (15 ratings)](https://appshunter.io/ios/app/watlow-ez-link/id1300751371/reviews) |
| Number of ratings | 8 | **15** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 18 months |
| Monetization | Free | Free |
| Size | 40 MB | 83 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [C3 Data](https://appshunter.io/developer/1145515517) | [Watlow](https://appshunter.io/developer/1156514464) |

## 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


### Watlow EZ

[App page](https://appshunter.io/ios/app/watlow-ez-link/id1300751371)

Easily configure, monitor, and adjust Watlow PM controllers using Bluetooth. Access all controller parameters with clear explanations and save/share configurations. Provides password protection and alarm indicators.

**Highlights:** Bluetooth wireless setup, Monitor and adjust controller parameters, Plain text parameter names with help topics, Save and import configuration files, Password protection, Alarm and error indicators

**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 Watlow EZ free?

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

### Which has better reviews, C3 Data or Watlow EZ?

C3 Data is rated higher. C3 Data averages 4.6 out of 5 from 8 ratings, while Watlow EZ averages 4.0 from 15 ratings.

### Do C3 Data or Watlow EZ have ads?

Neither C3 Data nor Watlow EZ shows ads.

### Which is updated more often, C3 Data or Watlow EZ?

C3 Data ships an update every 5 weeks, and Watlow EZ every 18 months. Most recently, C3 Data was updated on October 7, 2026 and Watlow EZ on October 9, 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.*