# Legacy View vs Essency Pro

The clearest difference is update cadence: Legacy View at every 3 weeks against Essency Pro's every 8 months. Legacy View also leads on ratings volume (4.4K vs 7). On price, rating, 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.

Essency Pro holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Legacy View has 4.4K ratings behind it against 7, so its average is the more settled of the two.

Legacy View ships an update every 3 weeks, Essency Pro every 8 months. The most recent releases landed on October 14, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Legacy View | Essency Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (4.4K ratings)](https://appshunter.io/ios/app/legacy-view/id1156891572/reviews) | **[4.9 (7 ratings)](https://appshunter.io/ios/app/essency-pro/id6447844312/reviews)** |
| Number of ratings | **4.4K** | 7 |
| Positive reviews | 45.4% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Free | Free |
| Size | 31 MB | 48 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Chandler Systems, Inc.](https://appshunter.io/developer/1156891571) | [FRANCE REDUCTEURS SA](https://appshunter.io/developer/1550272241) |

## What reviewers say

### Legacy View

[App page](https://appshunter.io/ios/app/legacy-view/id1156891572)

Monitor and control your Chandler Systems water treatment system with ease. View system settings, track water usage, and initiate cycles remotely. Connect to multiple valves from a single device and update valve firmware.

**Highlights:** View valve settings and status, Change valve settings remotely, Monitor water usage, Initiate regeneration/backwash cycles, Connect to multiple valves, Update valve firmware

**Features:** macOS Compatibility

**In-app purchases:** none


### Essency Pro

[App page](https://appshunter.io/ios/app/essency-pro/id6447844312)

This app serves as a comprehensive digital toolbox for installers of on-demand tank water heaters. It allows users to manage the installation and connection of new units, providing direct access to all necessary instructions and information from their mobile device.

**Highlights:** Install new water heaters, Connect water heaters, Access installation instructions, Direct information access, Digital toolbox

**In-app purchases:** none


## Frequently asked questions

### Is Legacy View free?

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

### Is Essency Pro free?

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

### Which has better reviews, Legacy View or Essency Pro?

Essency Pro is rated higher. Legacy View averages 4.7 out of 5 from 4.4K ratings, while Essency Pro averages 4.9 from 7 ratings.

### Do Legacy View or Essency Pro have ads?

Neither Legacy View nor Essency Pro shows ads.

### Which is updated more often, Legacy View or Essency Pro?

Legacy View ships an update every 3 weeks, and Essency Pro every 8 months. Most recently, Legacy View was updated on October 14, 2026 and Essency Pro on October 6, 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.*