# Pool Log vs Poolistry

The clearest difference is ads: Pool Log at none against Poolistry's shown. Pool Log also leads on monetization model (free vs free with in-app purchases). Poolistry's advantage is update cadence (weekly vs every 4 weeks) and ratings volume (27 vs 8). On price, rating, in-app purchases 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 and Poolistry sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Poolistry holds the better App Store score, 4.9 against 4.8. Both are backed by a comparable volume of ratings — 8 and 27 respectively.

Pool Log ships an update every 4 weeks, Poolistry weekly. Both last shipped on November 5, 2026.

## The numbers

| Metric | Pool Log | Poolistry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (8 ratings)](https://appshunter.io/ios/app/pool-log/id6744295287/reviews) | **[4.9 (27 ratings)](https://appshunter.io/ios/app/poolistry-pool-calculator/id6748267875/reviews)** |
| Number of ratings | 8 | **27** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 14 MB | 55 MB |
| Requires iOS | 26.0 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Holloway](https://appshunter.io/developer/877302832) | [Yonah Systems](https://appshunter.io/developer/1694042531) |

## 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 |


### Poolistry

[App page](https://appshunter.io/ios/app/poolistry-pool-calculator/id6748267875)

This app simplifies pool maintenance by offering smart calculators for water chemistry and a comprehensive log for tracking tests, chemicals, and tasks. It ensures your pool remains crystal clear with easy-to-follow guidance and cloud backup for your data.

**Highlights:** Smart chemical adjustment calculators, Water chemistry tracking (pH, chlorine, alkalinity, etc.), Maintenance task logging, Chemical addition tracking, Cloud backup and sync, Expense and notes logging

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Poolistry - Premium - 1 Month | $1.99 | per month |
| Poolistry - Premium - 1 Year | $9.99 | per year |
| Lifetime Premium Access | $59.99 | one-time |


## Frequently asked questions

### Is Pool Log free?

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

### Is Poolistry free?

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

### Which has better reviews, Pool Log or Poolistry?

Poolistry is rated higher. Pool Log averages 4.8 out of 5 from 8 ratings, while Poolistry averages 4.9 from 27 ratings.

### Do Pool Log or Poolistry have ads?

Poolistry shows ads; Pool Log does not.

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

Pool Log ships an update every 4 weeks, and Poolistry weekly. Most recently, Pool Log was updated on November 5, 2026 and Poolistry on November 5, 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.*