# Pool Math by TroubleFreePool vs ACTIVE STOPLEAK

The clearest difference is in-app purchases: ACTIVE STOPLEAK at none against Pool Math by TroubleFreePool's 1. ACTIVE STOPLEAK also leads on iOS requirement (13.4 vs 15.0). Pool Math by TroubleFreePool's advantage is update cadence (fortnightly vs every 2 months). On price, ads and device support 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. ACTIVE STOPLEAK asks for nothing beyond the download.

Pool Math by TroubleFreePool ships an update fortnightly, ACTIVE STOPLEAK every 2 months. The most recent releases landed on September 22, 2026 and May 16, 2026 respectively.

## The numbers

| Metric | Pool Math by TroubleFreePool | ACTIVE STOPLEAK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (272 ratings)](https://appshunter.io/ios/app/pool-math-by-troublefreepool/id1228819359/reviews)** | — |
| Number of ratings | **272** | — |
| Positive reviews | 63.4% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Freemium | — |
| Size | 314 MB | 30 MB |
| Requires iOS | 15.0 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TroubleFreePool](https://appshunter.io/developer/1228819358) | [R.B.M. SPA](https://appshunter.io/developer/1500244689) |

## 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


### ACTIVE STOPLEAK

[App page](https://appshunter.io/ios/app/active-stopleak/id6476567936)

**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 ACTIVE STOPLEAK free?

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

### Do Pool Math by TroubleFreePool or ACTIVE STOPLEAK have ads?

Neither Pool Math by TroubleFreePool nor ACTIVE STOPLEAK shows ads.

### Which is updated more often, Pool Math by TroubleFreePool or ACTIVE STOPLEAK?

Pool Math by TroubleFreePool ships an update fortnightly, and ACTIVE STOPLEAK every 2 months. Most recently, Pool Math by TroubleFreePool was updated on September 22, 2026 and ACTIVE STOPLEAK on May 16, 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.*