# eXact iDip vs Pool Shark H2O Pro

The clearest difference is rating: Pool Shark H2O Pro at 4.8 against eXact iDip's 4.0. Pool Shark H2O Pro also leads on in-app purchases (none vs 10) and review sentiment (100% vs 67%). eXact iDip's advantage is update cadence (every 6 weeks vs every 5 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. eXact iDip sells 10 one-off in-app purchases. Pool Shark H2O Pro asks for nothing beyond the download.

Pool Shark H2O Pro holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Pool Shark H2O Pro has 288 ratings behind it against 56, so its average is the more settled of the two. Written reviews point the same way: 67% of eXact iDip's written reviews are positive against 100% of Pool Shark H2O Pro's.

eXact iDip ships an update every 6 weeks, Pool Shark H2O Pro every 5 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | eXact iDip | Pool Shark H2O Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (56 ratings)](https://appshunter.io/ios/app/exact-idip/id579168702/reviews) | **[4.8 (288 ratings)](https://appshunter.io/ios/app/pool-shark-h2o-pro/id1467944894/reviews)** |
| Number of ratings | 56 | **288** |
| Positive reviews | 66.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 5 months |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 41 MB | 4 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Industrial Test Systems Inc.](https://appshunter.io/developer/579168705) | [Pool Shark H2O, Inc.](https://appshunter.io/developer/1143122519) |

## What reviewers say

### eXact iDip

[App page](https://appshunter.io/ios/app/exact-idip/id579168702)

This app transforms your smartphone into a powerful water testing tool. It works with a handheld photometer to provide accurate water analysis, store data, and track locations. Customize your testing with over 40 additional parameters available for purchase.

**Highlights:** Share test data via CSV, Seamless smartphone integration, Parameter information and data storage, GPS tracking, Over 40 purchasable test parameters, Quick and simple testing procedure

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Chloride CH | $4.99 | one-time |
| Copper CU | $4.99 | one-time |
| Iron, Total FE | $4.99 | one-time |
| Nitrate, Fresh NO3 | $4.99 | one-time |
| Phosphate PO4 | $4.99 | one-time |
| Sulfate SO4 | $4.99 | one-time |
| Hardness, Total High THH | $4.99 | one-time |
| Calcium CA | $4.99 | one-time |
| Smart Brew Bundle | $18.99 | one-time |
| 570 Marine Bundle | $23.99 | one-time |

**What reviewers like**

- 💯 Accurate results
- ⏱️ Quick testing
- ✅ Easy to use
- 💡 Innovative technology
- 💰 Value for money

**What reviewers complain about**

- ❌ Bluetooth connection issues
- 📉 Poor user interface
- 💸 Expensive test strips/algorithms
- ⚠️ Inconsistent results
- 🚫 GPS/location required

**Reported bugs**

- Bluetooth connection problems
- App crashes on launch or during use
- Lost purchased tests after update
- Results data goes missing
- Store section not showing items

**Requested features**

- Improve user interface and navigation
- Allow setting customer/site once for personal use
- Provide actual readings instead of 'LO'/'HIGH'
- Full screen support for iPhone X and iPads
- Better interface/integration between devices


### 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 eXact iDip free?

eXact iDip is free to download, with in-app purchases available.

### Is Pool Shark H2O Pro free?

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

### Which has better reviews, eXact iDip or Pool Shark H2O Pro?

Pool Shark H2O Pro is rated higher. eXact iDip averages 4.0 out of 5 from 56 ratings, while Pool Shark H2O Pro averages 4.8 from 288 ratings.

### Do eXact iDip or Pool Shark H2O Pro have ads?

Neither eXact iDip nor Pool Shark H2O Pro shows ads.

### Which is updated more often, eXact iDip or Pool Shark H2O Pro?

eXact iDip ships an update every 6 weeks, and Pool Shark H2O Pro every 5 months. Most recently, eXact iDip was updated on November 1, 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.*