# PoolWater vs Pool Log

The clearest difference is in-app purchases: PoolWater at none against Pool Log's 2. PoolWater also leads on iOS requirement (12.4 vs 26.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Pool Log sells 2 in-app purchases, starting at $0.99 per month. PoolWater asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 weeks. The most recent releases landed on October 5, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | PoolWater | Pool Log |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.7 (6 ratings)](https://appshunter.io/ios/app/pool-log/id6744295287/reviews)** |
| Number of ratings | — | **6** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | Every 2 weeks |
| Monetization | — | Free |
| Size | 23 MB | 11 MB |
| Requires iOS | **12.4** | 26.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Terence Newton](https://appshunter.io/developer/1729160858) | [Michael Holloway](https://appshunter.io/developer/877302832) |

## What reviewers say

### PoolWater

[App page](https://appshunter.io/ios/app/poolwater-pro/id6469515424)

**Features:** macOS Compatibility

**In-app purchases:** none


### Pool Log

[App page](https://appshunter.io/ios/app/pool-log/id6744295287)

This app provides precise chemical dosing instructions for pools and spas based on your test results. It tracks multiple water bodies, integrates local weather data, and offers advanced features like SLAM mode for algae and CSI calculations. All data is stored locally for privacy.

**Highlights:** Precise chemical dosing instructions, Manages multiple pools and spas, Weather-aware test result tracking, SLAM mode for algae treatment, Calcite Saturation Index (CSI) calculation, Chemical addition logging, Maintenance task tracking

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Plan | $0.99 | per month |
| Annual Plan | $7.99 | per year |


## Frequently asked questions

### Is PoolWater free?

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

### Is Pool Log free?

Pool Log is free to download, with in-app purchases available.

### Do PoolWater or Pool Log have ads?

Neither PoolWater nor Pool Log shows ads.

### Which is updated more often, PoolWater or Pool Log?

PoolWater ships an update every 2 weeks, and Pool Log every 2 weeks. Most recently, PoolWater was updated on October 5, 2026 and Pool Log on September 30, 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.*