# Nalco E vs CTVista+

The clearest difference is review sentiment: CTVista+ at 100% against Nalco E's 14%. CTVista+ also leads on rating (4.9 vs 3.0). Nalco E's advantage is iOS requirement (13.0 vs 15.6). On price, ratings volume, update cadence and ads there is nothing between them.

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

CTVista+ holds the better App Store score, 4.9 against 3.0. Both are backed by a comparable volume of ratings — 21 and 11 respectively. Written reviews point the same way: 14% of Nalco E's written reviews are positive against 100% of CTVista+'s.

Nalco E ships an update every 5 weeks, CTVista+ every 2 months. The most recent releases landed on June 4, 2026 and August 6, 2026 respectively.

## The numbers

| Metric | Nalco E | CTVista+ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (21 ratings)](https://appshunter.io/ios/app/nalco-e-data/id1229919601/reviews) | **[4.9 (11 ratings)](https://appshunter.io/ios/app/ctvista-plus/id1370245161/reviews)** |
| Number of ratings | **21** | 11 |
| Positive reviews | 14.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 2 months |
| Monetization | Free | Free |
| Size | 109 MB | 22 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NALCO COMPANY LLC](https://appshunter.io/developer/1229919600) | [Chemtreat International, Inc.](https://appshunter.io/developer/1370245160) |

## What reviewers say

### Nalco E

[App page](https://appshunter.io/ios/app/nalco-e-data/id1229919601)

This app allows users to easily capture and track system-specific data, including water chemistry, inventory, and meter readings. It helps ensure optimal performance of water systems and proactively identifies potential issues. Features include offline data capture and alerts for out-of-limit results.

**Highlights:** Capture water chemistry, inventory, and meter data, Trigger alerts for out-of-limit results, Measure bacteria counts quickly, Offline data capture capability, Proactive identification of system issues

**Features:** macOS Compatibility

**In-app purchases:** none


### CTVista+

[App page](https://appshunter.io/ios/app/ctvista-plus/id1370245161)

Monitor and control your water treatment system with real-time access to performance parameters, management reports, and inventory levels. This intelligent application helps you collect and react to critical water treatment operations 24/7.

**Highlights:** Real-time performance parameter monitoring, Management use reports, Inventory level tracking, 24/7 system access, Intelligent data collection and reaction

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

**In-app purchases:** none


## Frequently asked questions

### Is Nalco E free?

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

### Is CTVista+ free?

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

### Which has better reviews, Nalco E or CTVista+?

CTVista+ is rated higher. Nalco E averages 3.0 out of 5 from 21 ratings, while CTVista+ averages 4.9 from 11 ratings.

### Do Nalco E or CTVista+ have ads?

Neither Nalco E nor CTVista+ shows ads.

### Which is updated more often, Nalco E or CTVista+?

Nalco E ships an update every 5 weeks, and CTVista+ every 2 months. Most recently, Nalco E was updated on June 4, 2026 and CTVista+ on August 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.*