# Pool Math by TroubleFreePool vs Pool Shark H2O Pro

The clearest difference is rating: Pool Shark H2O Pro at 4.7 against Pool Math by TroubleFreePool's 3.7. Pool Shark H2O Pro also leads on review sentiment (100% vs 63%) and in-app purchases (none vs 1). Pool Math by TroubleFreePool's advantage is update cadence (fortnightly vs every 5 months). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Pool Math by TroubleFreePool sells 1 in-app purchase, starting at $7.99 per year. Pool Shark H2O Pro asks for nothing beyond the download.

Pool Shark H2O Pro holds the better App Store score, 4.7 against 3.7. Both are backed by a comparable volume of ratings — 272 and 219 respectively. Written reviews point the same way: 63% of Pool Math by TroubleFreePool's written reviews are positive against 100% of Pool Shark H2O Pro's.

Pool Math by TroubleFreePool ships an update fortnightly, Pool Shark H2O Pro every 5 months. The most recent releases landed on September 22, 2026 and September 20, 2026 respectively.

## The numbers

| Metric | Pool Math by TroubleFreePool | Pool Shark H2O Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (272 ratings)](https://appshunter.io/ios/app/pool-math-by-troublefreepool/id1228819359/reviews) | **[4.7 (219 ratings)](https://appshunter.io/ios/app/pool-shark-h2o-pro/id1467944894/reviews)** |
| Number of ratings | **272** | 219 |
| Positive reviews | 63.4% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 5 months |
| Monetization | Freemium | Free with in-app purchases |
| Size | 314 MB | 4 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TroubleFreePool](https://appshunter.io/developer/1228819358) | [Pool Shark H2O, Inc.](https://appshunter.io/developer/1143122519) |

## What reviewers say

### Pool Math by TroubleFreePool

[App page](https://appshunter.io/ios/app/pool-math-by-troublefreepool/id1228819359)

Easily manage your swimming pool's water chemistry by tracking key levels like chlorine and pH. This app calculates the precise amounts of chemicals needed to maintain clear, algae-free water, offering a cost-effective alternative to pool store advice.

**Highlights:** Chemical level calculators (pH, Chlorine, Alkalinity, etc.), Track pool maintenance tasks, Log chemical additions, Weather condition tracking, Chemical addition effect calculations, Bleach price comparison, Data backup and export

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pool Math Premium Subscription | $7.99 | per year |

**What reviewers like**

- 💎 Excellent for maintaining a clean, balanced pool
- 🔍 Comprehensive tracking of test results and chemical additions
- 🧠 Helpful recommendations for chemical adjustments
- ⚙️ Useful features like SLAM mode and timeline
- 🤖 Automatic weather data logging

**What reviewers complain about**

- 🐛 Issues with data syncing and backup
- 🤔 Unintuitive interface and navigation
- 💰 Subscription model and lack of one-time purchase
- 🚫 Limited support for non-chlorine sanitizers and spa-specific options
- 🔄 Bugs with chemical addition logging and target value retention

**Reported bugs**

- Subscription issues and inability to restore purchases
- App crashes and freezes on certain actions
- Incorrect chemical recommendations and calculations
- Disappearing historical data after updates

**Requested features**

- Custom target ranges and alerts
- Ability to log non-standard chemical additions
- Export options for data analysis
- Apple Watch integration
- Improved user guidance and on-boarding


### Pool Shark H2O Pro

[App page](https://appshunter.io/ios/app/pool-shark-h2o-pro/id1467944894)

This app simplifies pool and spa record-keeping and maintenance with compliant logs. It offers instant water analysis and chemical dosage instructions to reduce liability and maintain clean water.

**Highlights:** Health Department Compliant Logs, Instant Water Analysis, Chemical Dosage Instructions, Bluetooth Integration with LaMotte WaterLink Spin Touch, Automated Testing Reminders, Location-Based Pool Search, Tamper-Proof Electronic Logs

**In-app purchases:** none


## Frequently asked questions

### Is Pool Math by TroubleFreePool free?

Pool Math by TroubleFreePool is free to download, with in-app purchases available.

### Is Pool Shark H2O Pro free?

Pool Shark H2O Pro is free to download, with no in-app purchases.

### Which has better reviews, Pool Math by TroubleFreePool or Pool Shark H2O Pro?

Pool Shark H2O Pro is rated higher. Pool Math by TroubleFreePool averages 3.7 out of 5 from 272 ratings, while Pool Shark H2O Pro averages 4.7 from 219 ratings.

### Do Pool Math by TroubleFreePool or Pool Shark H2O Pro have ads?

Neither Pool Math by TroubleFreePool nor Pool Shark H2O Pro shows ads.

### Which is updated more often, Pool Math by TroubleFreePool or Pool Shark H2O Pro?

Pool Math by TroubleFreePool ships an update fortnightly, and Pool Shark H2O Pro every 5 months. Most recently, Pool Math by TroubleFreePool was updated on September 22, 2026 and Pool Shark H2O Pro on September 20, 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.*