# bloomWatch vs eDPPT

The clearest difference is update cadence: bloomWatch at every 4 months against eDPPT's every 39 months. 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.

bloomWatch ships an update every 4 months, eDPPT every 39 months. The most recent releases landed on September 28, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | bloomWatch | eDPPT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (12 ratings)](https://appshunter.io/ios/app/bloomwatch/id1107300124/reviews)** | — |
| Number of ratings | **12** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 39 months |
| Monetization | Free | — |
| Size | 216 MB | 8 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [United States Environmental Protection Agency (USEPA)](https://appshunter.io/developer/466052690) | [David Dieffenderfer](https://appshunter.io/developer/1344558121) |

## 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


### eDPPT

[App page](https://appshunter.io/ios/app/edppt/id1596289970)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is bloomWatch free?

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

### Is eDPPT free?

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

### Do bloomWatch or eDPPT have ads?

Neither bloomWatch nor eDPPT shows ads.

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

bloomWatch ships an update every 4 months, and eDPPT every 39 months. Most recently, bloomWatch was updated on September 28, 2026 and eDPPT on September 15, 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.*