# Lutra – Water Treatment App

> Water and wastewater treatment calculators for professionals. (iPhone/iPad app by Lutra Limited.)

- Source: https://appshunter.io/ios/app/lutra-water-treatment-app/id1228016094 (this page in markdown: same URL + `.md`)
- Developer: [Lutra Limited](https://appshunter.io/developer/1690703305)
- Category: Business, Utilities
- Price: Free
- Rating: 1.50/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.2 · 1 MB
- Languages: American English
- Released: 2017-04-20
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/lutra-water-treatment-app/id1228016094/reviews.md

## What is Lutra?

This Water Treatment App features of number of water and wastewater treatment calculators designed to save you time and help you work smarter. We will be adding new calculators regularly so if there is something you want calculated just let us know (help@lutra.com).

## Key features

- Water treatment calculators
- Wastewater treatment calculators
- Time-saving tools
- Work smarter
- Regularly updated calculators

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/lutra-water-treatment-app/id1228016094/reviews.md

### 2/5 — Was enjoying the app - unusable on iPhone 13 Pro Max

*2022-01-27*

The app seems to be inverted from how it should be on the iPhone 13 Pro Max. Top bar is white, the buttons are black, and in the calculator the backdrop is white and the blanks are black, with the labels for what is calculated where being illegible. Useful app on my old phone.

### 5/5 — Leaders in the field

*2017-05-17*

Great app.

## Frequently asked questions about Lutra

### What kind of calculators does Lutra offer?

Lutra provides a range of calculators specifically designed for water and wastewater treatment processes. These tools aim to simplify complex calculations for professionals in the field.

### How often are new calculators added to Lutra?

The developers plan to add new calculators regularly. Users are encouraged to submit requests for specific calculations they need via email to help@lutra.com.

### Is Lutra available on Android devices?

Currently, Lutra is supported on iPhone and iPod devices. Information regarding Android compatibility is not provided.

### What is the age rating for Lutra?

Lutra has an age rating of 4+, making it suitable for a wide range of users. This indicates it contains no mature content.

### When was Lutra last updated?

The latest version of Lutra was released on February 2, 2022. This indicates the app is maintained, though the frequency of major updates may vary.

### What is the user feedback on Lutra?

Lutra has received 2 ratings, resulting in an average of 1.5 stars. This suggests a generally negative user sentiment based on available data.

### Does Lutra have ads?

Lutra does not contain advertisements. As the app is free and does not have in-app purchases, users can expect an ad-free experience.

### What is the price of Lutra?

Lutra is available for free. There are no costs associated with downloading or using the application.

## Version history (last 5 releases)

### 1.2.3 — 2022-02-02

minor bugfixes

### 1.2.2 — 2021-04-13

Minor bugfixes

### 1.2.1 — 2019-07-19

Fix for coagulant dose converter metal ion calculation.

### 1.2 — 2019-05-03

Added in a range of new water and wastewater treatment calculators.

### 1.1 — 2018-02-23

Added support for iPhone X.

## Apps similar to Lutra

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [JNCTN](https://appshunter.io/ios/app/jnctn/id1592948898) | 4.6 (10) | Free | Business |
| [OsmoView](https://appshunter.io/ios/app/osmoview/id1233491269) | — | Free | Business |
| [Invoice Maker & Estimate Easy](https://appshunter.io/ios/app/invoice-maker-and-estimate-easy/id6748244387) | — | Free | Business |
| [Argus Tracking Check Sheet](https://appshunter.io/ios/app/argus-tracking-check-sheet/id1565036776) | — | Free | Business |

## More apps by Lutra Limited

- [ID](https://appshunter.io/ios/app/id/id1035494987)

All apps by Lutra Limited: https://appshunter.io/developer/1690703305

## Related topics

[water treatment](https://appshunter.io/ios/topics/water-treatment)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*