# Pool Heater vs Simple Pool

The clearest difference is in-app purchases: Pool Heater at none against Simple Pool's 1. Pool Heater also leads on iOS requirement (9.0 vs 17.6). Simple Pool's advantage is update cadence (every 6 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Simple Pool sells 1 one-off in-app purchase. Pool Heater asks for nothing beyond the download.

Pool Heater ships an update every 2 months, Simple Pool every 6 days. The most recent releases landed on October 26, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Pool Heater | Simple Pool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (21 ratings)](https://appshunter.io/ios/app/simple-pool-chemistry-and-math/id6744664712/reviews)** |
| Number of ratings | — | **21** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 days** |
| Monetization | — | Free with in-app purchases |
| Size | 24 MB | 29 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [Guangdong Chico Electronic Inc.](https://appshunter.io/developer/1238601940) | [Grey Park, LLC](https://appshunter.io/developer/1739831354) |

## What reviewers say

### Pool Heater

[App page](https://appshunter.io/ios/app/pool-heater/id1355580708)

**Features:** macOS Compatibility

**In-app purchases:** none


### Simple Pool

[App page](https://appshunter.io/ios/app/simple-pool-chemistry-and-math/id6744664712)

This app helps you precisely test, dose, and track your pool and spa water chemistry. It offers practical dosing recommendations and tools to simplify routine maintenance for various pool types. Get accurate chemical calculations without ongoing fees.

**Highlights:** Water test logging, Dosing recommendations, Chemical tracking, LSI/CSI monitoring, Shock treatment mode, Test reminders, Chemical effects preview

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SimplePool - Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is Pool Heater free?

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

### Is Simple Pool free?

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

### Do Pool Heater or Simple Pool have ads?

Neither Pool Heater nor Simple Pool shows ads.

### Which is updated more often, Pool Heater or Simple Pool?

Pool Heater ships an update every 2 months, and Simple Pool every 6 days. Most recently, Pool Heater was updated on October 26, 2026 and Simple Pool 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.*