# Pool Log vs Pool Chemistry by Poolometer

The clearest difference is in-app purchases: Pool Chemistry by Poolometer at none against Pool Log's 2. Pool Chemistry by Poolometer also leads on rating (5.0 vs 4.7) and update cadence (weekly vs every 2 weeks). Pool Log's advantage is ratings volume (6 vs 2). On price, ads, monetization model 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. Pool Chemistry by Poolometer asks for nothing beyond the download.

Pool Chemistry by Poolometer holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 6 and 2 respectively.

Pool Log ships an update every 2 weeks, Pool Chemistry by Poolometer weekly. The most recent releases landed on August 19, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Pool Log | Pool Chemistry by Poolometer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.7 (6 ratings)](https://appshunter.io/ios/app/pool-log/id6744295287/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/pool-chemistry-by-poolometer/id6762089418/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | Free | Free |
| Size | 11 MB | 8 MB |
| Requires iOS | 26.0 | **14.0** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Holloway](https://appshunter.io/developer/877302832) | [Wabi Sabi Ware LLC](https://appshunter.io/developer/1865324187) |

## What reviewers say

### 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 |


### Pool Chemistry by Poolometer

[App page](https://appshunter.io/ios/app/pool-chemistry-by-poolometer/id6762089418)

This app simplifies pool maintenance by logging water test results, calculating chemical dosages, and tracking historical trends. It provides a clear maintenance plan and can generate guest passes with house rules.

**Highlights:** Log water test readings, Calculate chemical dosages, Track water chemistry trends, Generate guest passes, Set maintenance reminders, Import/export pool records

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Pool Log free?

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

### Is Pool Chemistry by Poolometer free?

Pool Chemistry by Poolometer is free to download, with no in-app purchases.

### Which has better reviews, Pool Log or Pool Chemistry by Poolometer?

Pool Chemistry by Poolometer is rated higher. Pool Log averages 4.7 out of 5 from 6 ratings, while Pool Chemistry by Poolometer averages 5.0 from 2 ratings.

### Do Pool Log or Pool Chemistry by Poolometer have ads?

Neither Pool Log nor Pool Chemistry by Poolometer shows ads.

### Which is updated more often, Pool Log or Pool Chemistry by Poolometer?

Pool Log ships an update every 2 weeks, and Pool Chemistry by Poolometer weekly. Most recently, Pool Log was updated on August 19, 2026 and Pool Chemistry by Poolometer on September 16, 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.*