# Senrium vs Kactoily

The clearest difference is in-app purchases: Kactoily at none against Senrium's 3. Kactoily also leads on ads (none vs shown) and update cadence (every 9 days vs every 6 weeks). On price and device support there is nothing between them.

Both are free to download. Senrium sells 3 in-app purchases, starting at $2.49 per month. Kactoily asks for nothing beyond the download.

Senrium ships an update every 6 weeks, Kactoily every 9 days. The most recent releases landed on September 16, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Senrium | Kactoily |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.5 (11 ratings)](https://appshunter.io/ios/app/kactoily/id6744716298/reviews)** |
| Number of ratings | — | **11** |
| Positive reviews | — | 25.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | — | Free |
| Size | 64 MB | 58 MB |
| Requires iOS | 15.6 | **13** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Samuel Steele](https://appshunter.io/developer/1708640965) | [彦浩 宋](https://appshunter.io/developer/1808803601) |

## What reviewers say

### Senrium

[App page](https://appshunter.io/ios/app/senrium/id6467432068)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Single Aquarium (Monthly) | $2.49 | per month |
| Mutli (Monthly) | $3.99 | per month |
| +Pro (Monthly) | $14.99 | per month |


### Kactoily

[App page](https://appshunter.io/ios/app/kactoily/id6744716298)

This app monitors water quality for pools, aquariums, and other water bodies. It helps users track key parameters to ensure optimal conditions. The application provides essential data for maintaining healthy aquatic environments.

**Highlights:** Water quality monitoring, Pool monitoring, Aquarium monitoring, Data tracking, Environmental maintenance

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

**In-app purchases:** none


## Frequently asked questions

### Is Senrium free?

Senrium is free to download, with in-app purchases available.

### Is Kactoily free?

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

### Do Senrium or Kactoily have ads?

Senrium shows ads; Kactoily does not.

### Which is updated more often, Senrium or Kactoily?

Senrium ships an update every 6 weeks, and Kactoily every 9 days. Most recently, Senrium was updated on September 16, 2026 and Kactoily on September 21, 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.*