# Lutra vs ALS Compass Evolution

The clearest difference is update cadence: ALS Compass Evolution at fortnightly against Lutra's every 10 months. Lutra's advantage is iOS requirement (10.2 vs 14.2). On price, ads, in-app purchases and device support there is nothing between them.

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

Lutra ships an update every 10 months, ALS Compass Evolution fortnightly. The most recent releases landed on October 12, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Lutra | ALS Compass Evolution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[1.5 (2 ratings)](https://appshunter.io/ios/app/lutra-water-treatment-app/id1228016094/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Fortnightly** |
| Monetization | Free | — |
| Size | 1 MB | 53 MB |
| Requires iOS | **10.2** | 14.2 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Lutra Ltd](https://appshunter.io/developer/1690703305) | [Australian Laboratory Services Pty Ltd](https://appshunter.io/developer/1678954382) |

## What reviewers say

### Lutra

[App page](https://appshunter.io/ios/app/lutra-water-treatment-app/id1228016094)

This application offers a suite of water and wastewater treatment calculators to streamline your work. It aims to save you time and improve efficiency, with plans to regularly add new calculation tools based on user feedback.

**Highlights:** Water treatment calculators, Wastewater treatment calculators, Time-saving tools, Work smarter, Regularly updated calculators

**Features:** macOS Compatibility

**In-app purchases:** none


### ALS Compass Evolution

[App page](https://appshunter.io/ios/app/als-compass-evolution/id6467979005)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lutra free?

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

### Is ALS Compass Evolution free?

ALS Compass Evolution is free to download, with no in-app purchases.

### Do Lutra or ALS Compass Evolution have ads?

Neither Lutra nor ALS Compass Evolution shows ads.

### Which is updated more often, Lutra or ALS Compass Evolution?

Lutra ships an update every 10 months, and ALS Compass Evolution fortnightly. Most recently, Lutra was updated on October 12, 2026 and ALS Compass Evolution on October 22, 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.*