# HotTub&Pool vs Pool Shark H2O Pro

The clearest difference is review sentiment: Pool Shark H2O Pro at 100% against HotTub&Pool's 24%. Pool Shark H2O Pro also leads on rating (4.8 vs 3.5) and ratings volume (288 vs 13). HotTub&Pool's advantage is monetization model (free vs free with in-app purchases) and iOS requirement (8.0 vs 12.0). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Pool Shark H2O Pro holds the better App Store score, 4.8 against 3.5. That said, the two scores are not equally well evidenced: Pool Shark H2O Pro has 288 ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 24% of HotTub&Pool's written reviews are positive against 100% of Pool Shark H2O Pro's.

HotTub&Pool ships an update every 7 months, Pool Shark H2O Pro every 5 months. Both last shipped on November 6, 2026.

## The numbers

| Metric | HotTub&Pool | Pool Shark H2O Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (13 ratings)](https://appshunter.io/ios/app/hottub-and-pool/id358719601/reviews) | **[4.8 (288 ratings)](https://appshunter.io/ios/app/pool-shark-h2o-pro/id1467944894/reviews)** |
| Number of ratings | 13 | **288** |
| Positive reviews | 23.8% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 5 months** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 8 MB | 4 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Pixelwand Ltd](https://appshunter.io/developer/353011318) | [Pool Shark H2O, Inc.](https://appshunter.io/developer/1143122519) |

## What reviewers say

### HotTub&Pool

[App page](https://appshunter.io/ios/app/hottub-and-pool/id358719601)

This utility app helps hot tub, spa, and pool owners accurately calculate chemical dosages for water balancing. It supports calculations for alkalinity, pH, sanitizer, and stabilizer, along with water balancing features like the Langelier Saturation Index (LSI).

**Highlights:** Chemical dosage calculation, Water balancing (LSI), Pool volume calculator, Flow rate calculator, Turnover calculator, Filter size calculator

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 HotTub&Pool free?

HotTub&Pool is free to download, with no in-app purchases.

### Is Pool Shark H2O Pro free?

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

### Which has better reviews, HotTub&Pool or Pool Shark H2O Pro?

Pool Shark H2O Pro is rated higher. HotTub&Pool averages 3.5 out of 5 from 13 ratings, while Pool Shark H2O Pro averages 4.8 from 288 ratings.

### Do HotTub&Pool or Pool Shark H2O Pro have ads?

Neither HotTub&Pool nor Pool Shark H2O Pro shows ads.

### Which is updated more often, HotTub&Pool or Pool Shark H2O Pro?

HotTub&Pool ships an update every 7 months, and Pool Shark H2O Pro every 5 months. Most recently, HotTub&Pool was updated on November 6, 2026 and Pool Shark H2O Pro on November 6, 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.*