# bloomWatch vs VuSitu

The clearest difference is review sentiment: VuSitu at 100% against bloomWatch's 0%. VuSitu also leads on rating (4.9 vs 3.6) and update cadence (every 6 weeks vs every 4 months). bloomWatch's advantage is iOS requirement (13.0 vs 15.0). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

VuSitu holds the better App Store score, 4.9 against 3.6. Both are backed by a comparable volume of ratings — 12 and 16 respectively. Written reviews point the same way: 0% of bloomWatch's written reviews are positive against 100% of VuSitu's.

bloomWatch ships an update every 4 months, VuSitu every 6 weeks. The most recent releases landed on September 10, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | bloomWatch | VuSitu |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.6 (12 ratings)](https://appshunter.io/ios/app/bloomwatch/id1107300124/reviews) | **[4.9 (16 ratings)](https://appshunter.io/ios/app/vusitu/id1448937574/reviews)** |
| Number of ratings | 12 | **16** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 216 MB | 170 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United States Environmental Protection Agency (USEPA)](https://appshunter.io/developer/466052690) | [In-Situ Inc.](https://appshunter.io/developer/592873894) |

## What reviewers say

### bloomWatch

[App page](https://appshunter.io/ios/app/bloomwatch/id1107300124)

This app allows users to document and track the occurrence of freshwater algae blooms. Your submissions help scientists and public health officials monitor water quality and manage resources for recreation and potable water.

**Highlights:** Document algae bloom occurrences, Track bloom location and frequency, Contribute to water quality monitoring, Support scientific research, Report potentially harmful blooms

**Features:** macOS Compatibility

**In-app purchases:** none


### VuSitu

[App page](https://appshunter.io/ios/app/vusitu/id1448937574)

Easily connect to water monitoring instruments to view, manage, and share water quality and quantity data. Configure, calibrate, and deploy instruments, view live readings, and set up logs. Securely store and share data through a cloud-based account.

**Highlights:** Connect to In-Situ instruments, View live water quality data, Configure and calibrate instruments, Create and manage log files, Secure cloud data storage, Share data via HydroVu, Instant graphing for readings

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

**In-app purchases:** none


## Frequently asked questions

### Is bloomWatch free?

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

### Is VuSitu free?

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

### Which has better reviews, bloomWatch or VuSitu?

VuSitu is rated higher. bloomWatch averages 3.6 out of 5 from 12 ratings, while VuSitu averages 4.9 from 16 ratings.

### Do bloomWatch or VuSitu have ads?

Neither bloomWatch nor VuSitu shows ads.

### Which is updated more often, bloomWatch or VuSitu?

bloomWatch ships an update every 4 months, and VuSitu every 6 weeks. Most recently, bloomWatch was updated on September 10, 2026 and VuSitu on August 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.*