Timer4 vs ChlorCast
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Timer4
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.
- Physics-based interface
- Instant duration switching via rotation
- Smart motion detection
- Immersive haptic feedback
- Customizable timer presets
- Intuitive orientation control
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Keep your four go-to timers just a turn away. Study and breaks, cooking and workouts: with Timer4, you don’t have to set the same times over and over. ◆ Turn to switch timers Each side of your iPhone holds a timer: 5 minutes, 10 minutes, 30 minutes, or 1 hour. Turn to the one you need and tap Start. In Rotate view, the cards move with gravity. If you’d rather not turn your phone, switch Timer View to List and pick from all four timers on one screen. ◆ Timer sets for every routine Save up to 10 sets for studying, cooking, workouts, and more. Each set holds four timers. Swipe left or right to jump to the set you need. ◆ All four at a glance on big screens On wider screens, such as iPad, all four timers appear on one screen. No turning needed. Just tap Start on the timer you want. ◆ Start right from your Home Screen Tap a timer in the widget to open the app and start the countdown. Each widget can show its own timer set. ◆ Check and control it from the Lock Screen See the time left on the Lock Screen, and pause, resume, or stop without opening the app. On iPhone models with the Dynamic Island, you can check and control the timer there too. ◆ Make every timer your own Name each timer, set its length, and change the screen and border colors. Show the numbers in the font you like. Only one timer runs at a time. Whether you’re settling in to focus or taking a quick break, keep the times you need ready in Timer4. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
ChlorCast
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.
- 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
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ChlorCast helps you stay ahead of water problems by combining fast test logging, clear chemistry guidance, chlorine forecasting, and maintenance tracking in one simple app. Whether you want a quick daily chlorine and pH check or a full chemistry snapshot, ChlorCast helps you understand your pool and know exactly what to do next. With every test you log, ChlorCast turns your readings into practical next steps. Instead of leaving you with numbers alone, the app highlights what needs attention, estimates chemical adjustments, and helps you keep your water balanced with more confidence. Weather-aware chlorine forecasting also helps you prepare for days when heat, sun, and rain may drive chlorine down faster than usual. ChlorCast is designed for real-world pool ownership, not just calculations. It gives you a current water snapshot, tracks test history over time, helps you monitor chemical inventory, and keeps useful pool-side references close at hand. The result is a cleaner, more organized way to manage your pool all season long. Features: • Log quick tests for free chlorine and pH • Record full chemistry tests including FC, pH, CC, TA, CH, CYA, and temperature • Get fix recommendations based on your latest readings • See when water needs attention and what action to take next • Forecast chlorine loss using weather conditions and upcoming trends • Track test history and monitor changes over time • View a current water health snapshot and seasonal metrics • Manage chemical inventory and estimated chemical costs • Keep maintenance records in one place • Use built-in conversion references while testing pool-side • Set reminders for quick tests, full tests, and forecast-driven chlorine checks ChlorCast is built to help pool owners stay proactive, reduce uncertainty, and spend less time guessing at water care. From daily upkeep to longer-term chemistry trends, it gives you a clearer picture of your pool and a better plan for keeping it swim-ready. If you want a smarter way to test, track, forecast, and maintain your pool water, ChlorCast is ready to help.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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 November 6, 2026 and November 10, 2026 respectively.
| Parameter | Timer4 | ChlorCast |
|---|---|---|
| Price | Free | Free |
| Rating | 3.8 (5 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 44.4% of reviews | — |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 3 weeks | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.1 | 26.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Goateraction | Sean OBrien |
Customer experience
Timer4
ChlorCast
In-app purchases
Timer4
- Lifetime Access$4.99
ChlorCast
No in-app purchases









