# Pool vs Predator Clock

The clearest difference is price: Predator Clock at Free against Pool's $4.99. Predator Clock also leads on review sentiment (59% vs 22%) and rating (4.4 vs 4.2). Pool's advantage is update cadence (every 5 weeks vs every 5 months) and ratings volume (629 vs 31). On ads, in-app purchases, monetization model and device support there is nothing between them.

Predator Clock is free to download; Pool costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Predator Clock holds the better App Store score, 4.4 against 4.2. That said, the two scores are not equally well evidenced: Pool has 629 ratings behind it against 31, so its average is the more settled of the two. Written reviews point the same way: 22% of Pool's written reviews are positive against 59% of Predator Clock's.

Pool ships an update every 5 weeks, Predator Clock every 5 months. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Pool | Predator Clock |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.2 (629 ratings)](https://appshunter.io/ios/app/pool-calculator/id412876581/reviews) | **[4.4 (31 ratings)](https://appshunter.io/ios/app/predator-clock-alarm-clock/id585530239/reviews)** |
| Number of ratings | **629** | 31 |
| Positive reviews | 21.8% of reviews | **59.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | Free | Free |
| Size | 17 MB | 12 MB |
| Requires iOS | **15.1** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [Pool and Spa Resources, LLC](https://appshunter.io/developer/1358030201) | [Dropouts Technologies LLP](https://appshunter.io/developer/575481782) |

## What reviewers say

### Pool

[App page](https://appshunter.io/ios/app/pool-calculator/id412876581)

This app simplifies swimming pool and hot tub chemistry maintenance by performing all necessary calculations. It provides clear instructions on chemical dosages to maintain balanced, clear water, eliminating the need for complex charts and formulas.

**Highlights:** Chemical dosage calculations, Pool volume calculation, Chemical effects analysis, Customizable chemical ranges, Offline functionality

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 💡 Useful pool chemistry calculator
- 🚀 Makes pool maintenance easy
- 👍 Provides chemical dosage recommendations
- 🔍 Helpful 'Effects' tool to understand chemical impacts

**What reviewers complain about**

- 🐛 Accuracy issues with certain chemical calculations
- 🔍 Confusing or outdated chemical names
- 🔍 Limited customization options
- 🐛 Crashes and compatibility issues with newer iOS versions

**Reported bugs**

- App crashes on launch for many users
- Keyboard issues preventing data entry
- Incorrect chemical effect information (e.g. soda ash)
- Volume calculation not updating properly

**Requested features**

- Ability to save and track test history
- Support for multiple pools/spas
- Metric-only unit support
- More detailed chemical dosage information (e.g. weight-based)


### Predator Clock

[App page](https://appshunter.io/ios/app/predator-clock-alarm-clock/id585530239)

This alarm clock app features unique Predator-themed sounds, including clicking and screams, along with visual effects like explosions for its countdown timer. Users can customize the clock's color and access settings by double-tapping the screen.

**Highlights:** Predator clicking and scream sounds, Explosion effect for countdown timer, Customizable clock color, Double-tap to access settings, Time bomb with Predator laugh, Predator Clock Widget

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Pool free?

Pool costs $4.99, with no in-app purchases.

### Is Predator Clock free?

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

### Which has better reviews, Pool or Predator Clock?

Predator Clock is rated higher. Pool averages 4.2 out of 5 from 629 ratings, while Predator Clock averages 4.4 from 31 ratings.

### Do Pool or Predator Clock have ads?

Neither Pool nor Predator Clock shows ads.

### Which is updated more often, Pool or Predator Clock?

Pool ships an update every 5 weeks, and Predator Clock every 5 months. Most recently, Pool was updated on October 13, 2026 and Predator Clock on October 9, 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.*