# Pool Math by TroubleFreePool vs DolphinTech Plus

The clearest difference is review sentiment: Pool Math by TroubleFreePool at 63% against DolphinTech Plus's 8%. Pool Math by TroubleFreePool also leads on rating (3.7 vs 1.7) and update cadence (fortnightly vs every 4 months). DolphinTech Plus's advantage is in-app purchases (none vs 1). On price, ads, device support and iOS requirement 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. DolphinTech Plus asks for nothing beyond the download.

Pool Math by TroubleFreePool holds the better App Store score, 3.7 against 1.7. That said, the two scores are not equally well evidenced: Pool Math by TroubleFreePool has 272 ratings behind it against 13, 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 8% of DolphinTech Plus's.

Pool Math by TroubleFreePool ships an update fortnightly, DolphinTech Plus every 4 months. The most recent releases landed on October 7, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Pool Math by TroubleFreePool | DolphinTech Plus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (272 ratings)](https://appshunter.io/ios/app/pool-math-by-troublefreepool/id1228819359/reviews)** | [1.7 (13 ratings)](https://appshunter.io/ios/app/dolphintech-plus/id1406110365/reviews) |
| Number of ratings | **272** | 13 |
| Positive reviews | **63.4% of reviews** | 8.3% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 4 months |
| Monetization | Freemium | **Free** |
| Size | 314 MB | 95 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [TroubleFreePool](https://appshunter.io/developer/1228819358) | [Maytronics](https://appshunter.io/developer/664564907) |

## 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


### DolphinTech Plus

[App page](https://appshunter.io/ios/app/dolphintech-plus/id1406110365)

This app offers technicians a clever diagnostic and repair tool for robots. It allows for easy connection, parameter access, and system diagnosis to identify and fix errors. Technicians can also perform various repair actions and access helpful resources.

**Highlights:** Connect to LIBERTY™ Robots, Access robot parameters via Bluetooth, Perform system diagnosis, Execute corrective actions, Activate tic-tac mode, Motor unit replacement, Access knowledge articles and videos

**Features:** Vision Pro support

**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 DolphinTech Plus free?

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

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

Pool Math by TroubleFreePool is rated higher. Pool Math by TroubleFreePool averages 3.7 out of 5 from 272 ratings, while DolphinTech Plus averages 1.7 from 13 ratings.

### Do Pool Math by TroubleFreePool or DolphinTech Plus have ads?

Neither Pool Math by TroubleFreePool nor DolphinTech Plus shows ads.

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

Pool Math by TroubleFreePool ships an update fortnightly, and DolphinTech Plus every 4 months. Most recently, Pool Math by TroubleFreePool was updated on October 7, 2026 and DolphinTech Plus on October 8, 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.*