# SOL Smart vs Pool Water Calculator

The clearest difference is price: SOL Smart at Free against Pool Water Calculator's $4.99. SOL Smart also leads on iOS requirement (9.0 vs 13.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

SOL Smart is free to download; Pool Water Calculator costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

SOL Smart ships an update every 3 weeks, Pool Water Calculator fortnightly. The most recent releases landed on October 26, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | SOL Smart | Pool Water Calculator |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | — | **[4.6 (95 ratings)](https://appshunter.io/ios/app/pool-water-calculator/id1249919347/reviews)** |
| Number of ratings | — | **95** |
| Positive reviews | — | 76.7% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Fortnightly** |
| Monetization | — | Free |
| Size | 42 MB | 30 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kaian Intelligent Technology co., Ltd](https://appshunter.io/developer/897488071) | [Ingenio Productions LLC](https://appshunter.io/developer/1249919346) |

## What reviewers say

### SOL Smart

[App page](https://appshunter.io/ios/app/sol-smart/id1107199597)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pool Water Calculator

[App page](https://appshunter.io/ios/app/pool-water-calculator/id1249919347)

This app helps you precisely balance and maintain your pool or spa water chemistry. It offers a chemistry calculator, pool volume measurement, and detailed data logging with visual trend analysis. Get tailored recommendations and manage multiple water profiles with ease.

**Highlights:** Chemistry calculator for precise chemical dosages, Pool volume calculator, Data logging for test results and additions, Visual trend graphs for water chemistry, Personalized chemical recommendations, Manage multiple pool/spa profiles, Broad chemical support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SOL Smart free?

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

### Is Pool Water Calculator free?

Pool Water Calculator costs $4.99, with no in-app purchases.

### Do SOL Smart or Pool Water Calculator have ads?

Neither SOL Smart nor Pool Water Calculator shows ads.

### Which is updated more often, SOL Smart or Pool Water Calculator?

SOL Smart ships an update every 3 weeks, and Pool Water Calculator fortnightly. Most recently, SOL Smart was updated on October 26, 2026 and Pool Water Calculator on November 2, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*