# Pool Math by TroubleFreePool vs Power

The clearest difference is review sentiment: Pool Math by TroubleFreePool at 63% against Power's 0%. Pool Math by TroubleFreePool also leads on rating (3.6 vs 1.5) and ratings volume (287 vs 2). Power's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 15.0). 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. Power asks for nothing beyond the download.

Pool Math by TroubleFreePool holds the better App Store score, 3.6 against 1.5. That said, the two scores are not equally well evidenced: Pool Math by TroubleFreePool has 287 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 63% of Pool Math by TroubleFreePool's written reviews are positive against 0% of Power's.

Pool Math by TroubleFreePool ships an update fortnightly, Power every 2 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Pool Math by TroubleFreePool | Power |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.6 (287 ratings)](https://appshunter.io/ios/app/pool-math-by-troublefreepool/id1228819359/reviews)** | [1.5 (2 ratings)](https://appshunter.io/ios/app/power-sonic-lithium/id6446947396/reviews) |
| Number of ratings | **287** | 2 |
| Positive reviews | **63.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Freemium | **Free** |
| Size | 314 MB | 11 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [TroubleFreePool](https://appshunter.io/developer/1228819358) | [Power Sonic Europe Limited](https://appshunter.io/developer/1460233457) |

## 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


### Power

[App page](https://appshunter.io/ios/app/power-sonic-lithium/id6446947396)

Monitor battery health in real-time, displaying voltage, current, and power. Get instant alerts for critical conditions like over-temperature or under-voltage. Compare individual cell voltages and manage your battery's on/off status with ease.

**Highlights:** Real-time parameter display (voltage, current, power), Battery on/off control, Single battery voltage and alarm status, Cell voltage difference comparison, Real-time critical condition alarms, Warning event logging

**Features:** macOS Compatibility

**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 Power free?

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

### Which has better reviews, Pool Math by TroubleFreePool or Power?

Pool Math by TroubleFreePool is rated higher. Pool Math by TroubleFreePool averages 3.6 out of 5 from 287 ratings, while Power averages 1.5 from 2 ratings.

### Do Pool Math by TroubleFreePool or Power have ads?

Neither Pool Math by TroubleFreePool nor Power shows ads.

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

Pool Math by TroubleFreePool ships an update fortnightly, and Power every 2 months. Most recently, Pool Math by TroubleFreePool was updated on November 4, 2026 and Power on November 3, 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.*