HotTub&Pool vs Pool Shark H2O Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HotTub&Pool
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).
- Chemical dosage calculation
- Water balancing (LSI)
- Pool volume calculator
- Flow rate calculator
- Turnover calculator
- Filter size calculator
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Calculator for hot tub, spa and pool owners to take the guesswork out of how much of each chemical you should be adding. The calculator will correctly work out doses for Calcium, raising and lowering alkalinity and pH, and adding the correct amounts of sanitizer and stabiliser. Also includes water balancing feature to allow you to calculate your pools or hot tubs Langelier Saturation Index (LSI) to help maintain an efficient and smooth running system. Common Pool Calculators • Pool Volume Calculator • Flow Rate Calculator • Turnover Calculator • Minimum Filter Size Calculator • Total Dynamic Head (measured) Calculator
Pool Shark H2O Pro
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.
- 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
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Simplify Pool and Spa record keeping and maintenance with 100% Health Department Compliant logs! Instant water analysis and chemical dosage instructions help reduce liability and keep water clean. Ideal for property managers, health clubs, hotels, water parks and resort pools and spas. Certified by the Council for the Model Aquatic Health Code as compliant with the CDC's MAHC guidelines. This app provides additional functionality to the Pool Shark H2o service. Account or Free Trial required for login. 30 different recording options configurable by pool, including Chlorine, Bromine, pH, Alkalinity and more.. Instant dosage calculation and instructions makes it easy to keep the water clean and safe. ** Chemical Dosage Calculations - make it fast and easy to keep water clean. ** Integrates with LaMotte WaterLink Spin Touch systems through bluetooth making water chemical testing as easy as pushing a button. ** Reminders when pools need to be tested ** Smart Search - detects your location and provides details for the pool/spa closest to you, eliminating the need to search for pools. ** Notifications & Alerts keeps management and maintenance staff aware when pools need attention. ** Reduce Liability - Tamper proof electronic logs stamped with the users name, date and time, keep an accurate record for compliance and liability. ** Lower Costs - Chemical Dosage calculations done automatically for each pool saves time and money spent on excess chemicals. The patented Pool Shark H2O service supports ALL your pool logs and staff, making it fast and easy to stay in compliance with health code regulations.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | HotTub&Pool | Pool Shark H2O Pro |
|---|---|---|
| Price | Free | Free |
| Rating | 3.5 (13 ratings) | 4.8 (288 ratings) — better |
| Positive reviews | 23.8% of reviews | 100.0% of reviews — better |
| Number of ratings | 13 | 288 — better |
| Update frequency | Every 7 months | Every 5 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 8.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 8 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Pixelwand Ltd | Pool Shark H2O, Inc. |
Customer experience
HotTub&Pool
Pool Shark H2O Pro
In-app purchases
HotTub&Pool
No in-app purchases
Pool Shark H2O Pro
No in-app purchases
Questions
Is HotTub&Pool free?
Is Pool Shark H2O Pro free?
Which has better reviews, HotTub&Pool or Pool Shark H2O Pro?
Do HotTub&Pool or Pool Shark H2O Pro have ads?
Which is updated more often, HotTub&Pool or Pool Shark H2O Pro?
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