# Wastewater Manager vs OTCO

The clearest difference is price: OTCO at Free against Wastewater Manager's $8.99. OTCO also leads on rating (5.0 vs 4.5). Wastewater Manager's advantage is chart position (#132 vs unranked) and iOS requirement (12.0 vs 14.0). On ratings volume, ads, in-app purchases and device support there is nothing between them.

OTCO is free to download; Wastewater Manager costs $8.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OTCO holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Wastewater Manager | OTCO |
| --- | --- | --- |
| Price | $8.99 | **Free** |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/wastewater-manager/id598620924/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/otco/id6478231623/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Paid | **Free** |
| Best chart rank | **#132** | — |
| Size | 32 MB | 248 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [H3Apps LLC](https://appshunter.io/developer/598620927) | [OPERATOR TRAINING COMMITTEE OF OHIO, INC.](https://appshunter.io/developer/1732281658) |

## What reviewers say

### Wastewater Manager

[App page](https://appshunter.io/ios/app/wastewater-manager/id598620924)

**Currently charting:** #132 Top Paid · Business (US App Store)

This app provides over 75 essential formulas for wastewater operators and engineers. It simplifies daily lab work and troubleshooting by organizing calculations by process type. Answers can be easily emailed for sharing.

**Highlights:** Over 75 wastewater formulas, Organized by process type, English measurements only, Email answers, Troubleshooting assistance

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

**In-app purchases:** none


### OTCO

[App page](https://appshunter.io/ios/app/otco/id6478231623)

Stay informed about water and wastewater industry training with up-to-date notifications. Access exclusive discount codes for events and register directly through the app. View informative videos and connect with professionals in the field.

**Highlights:** Training notifications, Event discount codes, Event registration, Video library, Push notifications

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


## Frequently asked questions

### Is Wastewater Manager free?

Wastewater Manager costs $8.99, with no in-app purchases.

### Is OTCO free?

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

### Which has better reviews, Wastewater Manager or OTCO?

OTCO is rated higher. Wastewater Manager averages 4.5 out of 5 from 2 ratings, while OTCO averages 5.0 from 1 ratings.

### Do Wastewater Manager or OTCO have ads?

Neither Wastewater Manager nor OTCO shows ads.

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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.*