# Bluezone Pool vs Holler

The clearest difference is rating: Holler at 5.0 against Bluezone Pool's 3.2. Holler also leads on update cadence (fortnightly vs every 7 months). Bluezone Pool's advantage is in-app purchases (none vs 1) and ratings volume (11 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Holler sells 1 one-off in-app purchase. Bluezone Pool asks for nothing beyond the download.

Holler holds the better App Store score, 5.0 against 3.2. That said, the two scores are not equally well evidenced: Bluezone Pool has 11 ratings behind it against 1, so its average is the more settled of the two.

Bluezone Pool ships an update every 7 months, Holler fortnightly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Bluezone Pool | Holler |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.2 (11 ratings)](https://appshunter.io/ios/app/bluezone-pool/id1462354409/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/holler-microphone-for-sonos/id6810526797/reviews)** |
| Number of ratings | **11** | 1 |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 2 MB | 5 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Toscano Linea Electronica SL](https://appshunter.io/developer/1170172273) | [Task One LLC](https://appshunter.io/developer/6809324060) |

## What reviewers say

### Bluezone Pool

[App page](https://appshunter.io/ios/app/bluezone-pool/id1462354409)

Control your swimming pool's filter system and lighting directly from your smartphone. This app connects via Bluetooth to manage startup, timing, and monitor the status of your pool's equipment.

**Highlights:** Manual filter system startup, Spotlight control and timing, Filter cycle and lighting timing check, Equipment status monitoring, Filter pump problem detection

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

**In-app purchases:** none


### Holler

[App page](https://appshunter.io/ios/app/holler-microphone-for-sonos/id6810526797)

Transform your Sonos speakers into a whole-home intercom system. Broadcast live messages, record and send announcements, or play pre-made sounds across one room or many. It's designed for privacy, working locally on your Wi-Fi without accounts or tracking.

**Highlights:** Whole-home intercom for Sonos, Live microphone broadcasts, Record and send announcements, Play pre-made sounds, Selectable room grouping, Restores previous Sonos settings, Local and private operation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Holler Pro | $2.99 | one-time |


## Frequently asked questions

### Is Bluezone Pool free?

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

### Is Holler free?

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

### Which has better reviews, Bluezone Pool or Holler?

Holler is rated higher. Bluezone Pool averages 3.2 out of 5 from 11 ratings, while Holler averages 5.0 from 1 ratings.

### Do Bluezone Pool or Holler have ads?

Neither Bluezone Pool nor Holler shows ads.

### Which is updated more often, Bluezone Pool or Holler?

Bluezone Pool ships an update every 7 months, and Holler fortnightly. Most recently, Bluezone Pool was updated on November 3, 2026 and Holler on October 31, 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.*