# Pool Doc vs PoolChem Tracker

The clearest difference is update cadence: PoolChem Tracker at every 5 days against Pool Doc's every 3 weeks. Pool Doc's advantage is iOS requirement (17.6 vs 26.4). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Pool Doc sells 2 in-app purchases, starting at $0.99 per month and PoolChem Tracker sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Pool Doc ships an update every 3 weeks, PoolChem Tracker every 5 days. The most recent releases landed on October 10, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Pool Doc | PoolChem Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.6 (7 ratings)](https://appshunter.io/ios/app/poolchem-tracker/id6762652630/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | — | Freemium |
| Size | 4 MB | 12 MB |
| Requires iOS | **17.6** | 26.4 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Wenxin Zhang](https://appshunter.io/developer/987244448) | [Jeffrey Thompson](https://appshunter.io/developer/1894944456) |

## What reviewers say

### Pool Doc

[App page](https://appshunter.io/ios/app/pool-doc-pool-chemical-log/id6759406468)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $0.99 | per month |
| Premium Yearly | $7.99 | per year |


### PoolChem Tracker

[App page](https://appshunter.io/ios/app/poolchem-tracker/id6762652630)

This app provides precise pool chemical dosing recommendations based on your test results and pool size. It calculates a health score for your water and offers a prioritized action list to maintain balance. Works offline with no account required.

**Highlights:** Precise dosing recommendations, Pool Health Score (0-100), Prioritized action list, CYA-adjusted chlorine targets, LSI calculator, Chemical inventory tracking, Offline functionality

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PoolChem Pro | $4.99 | one-time |


## Frequently asked questions

### Is Pool Doc free?

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

### Is PoolChem Tracker free?

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

### Do Pool Doc or PoolChem Tracker have ads?

Neither Pool Doc nor PoolChem Tracker shows ads.

### Which is updated more often, Pool Doc or PoolChem Tracker?

Pool Doc ships an update every 3 weeks, and PoolChem Tracker every 5 days. Most recently, Pool Doc was updated on October 10, 2026 and PoolChem Tracker on October 20, 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.*