# Timer4 vs ChlorCast

The clearest difference is rating: ChlorCast at 5.0 against Timer4's 3.8. ChlorCast also leads on in-app purchases (none vs 1) and update cadence (every 8 days vs every 3 weeks). Timer4's advantage is ratings volume (5 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Timer4 sells 1 one-off in-app purchase. ChlorCast asks for nothing beyond the download.

ChlorCast holds the better App Store score, 5.0 against 3.8. That said, the two scores are not equally well evidenced: Timer4 has 5 ratings behind it against 1, so its average is the more settled of the two.

Timer4 ships an update every 3 weeks, ChlorCast every 8 days. The most recent releases landed on October 9, 2026 and September 29, 2026 respectively.

## The numbers

| Metric | Timer4 | ChlorCast |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/timer4-gravity-timer/id6755321732/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chlorcast/id6777863208/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 28.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 3 MB | 6 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Goateraction](https://appshunter.io/developer/1647805479) | [Sean OBrien](https://appshunter.io/developer/6777834311) |

## What reviewers say

### Timer4

[App page](https://appshunter.io/ios/app/timer4-gravity-timer/id6755321732)

This app offers a unique timer experience by automatically adjusting countdown durations based on your device's orientation. Simply rotate your phone to switch between preset intervals with a physics-driven interface and immersive haptic feedback.

**Highlights:** Physics-based interface, Instant duration switching via rotation, Smart motion detection, Immersive haptic feedback, Customizable timer presets, Intuitive orientation control

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Access | $4.99 | one-time |


### ChlorCast

[App page](https://appshunter.io/ios/app/chlorcast/id6777863208)

This app simplifies pool care by logging water tests, providing chemistry guidance, and forecasting chlorine levels. It helps users understand their pool's needs and maintain balanced water with practical, actionable advice.

**Highlights:** Log quick and full chemistry tests, Get chemistry fix recommendations, Forecast chlorine loss with weather data, Track test history and water changes, Manage chemical inventory, Set maintenance reminders

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

**In-app purchases:** none


## Frequently asked questions

### Is Timer4 free?

Timer4 is free to download, with in-app purchases available.

### Is ChlorCast free?

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

### Which has better reviews, Timer4 or ChlorCast?

ChlorCast is rated higher. Timer4 averages 3.8 out of 5 from 5 ratings, while ChlorCast averages 5.0 from 1 ratings.

### Do Timer4 or ChlorCast have ads?

Neither Timer4 nor ChlorCast shows ads.

### Which is updated more often, Timer4 or ChlorCast?

Timer4 ships an update every 3 weeks, and ChlorCast every 8 days. Most recently, Timer4 was updated on October 9, 2026 and ChlorCast on September 29, 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.*