The best pool app in 2026
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A good pool app turns your test numbers into exact doses, works at the poolside, and keeps your data private. Here’s an honest look at the main options in 2026 and where each one fits.
What makes a pool app worth using
The best pool app answers the real question: what do I add, and how much? Look for exact doses and the safe order to add them, support for pools, hot tubs, and saltwater, offline use, logging and reminders, real data privacy, and a free tier that does something useful.
DoseMyPool
Enter your readings and DoseMyPool gives the exact product, amount, and safe order to add, with never-mix safety warnings. It covers pools, hot tubs, and saltwater, works fully offline, and needs no account: your data stays on your device. The calculator, logging, history, and trend charts are free; Premium adds trend insights, the full troubleshooting library, equipment reminders, and cost tracking.
Pool Math (Trouble Free Pool)
Pool Math is free and well trusted, with a solid calculator and log. It leans on the Trouble Free Pool method. Premium, at $7.99 a year, adds full history, multiple pools, and backup, sync, and reminders.
The discontinued and hardware apps
Sutro and pHin were popular monitor apps but have been discontinued, so former users need a software replacement. WaterGuru and Ondilo still sell capable monitors, but they cost $399 and $449 up front, and WaterGuru’s cassettes are a recurring expense.
Pool apps at a glance in 2026
| App | Cost | Exact dosing | Pool / spa / salt | Offline | Your data |
|---|---|---|---|---|---|
| DoseMyPool | Free + Premium | Yes | All three | Yes | On your device |
| Pool Math | Free, Premium $7.99/yr | Yes (TFP method) | Pool and spa | Not stated | Cloud sync on Premium |
| Sutro / pHin | Discontinued | n/a | n/a | n/a | n/a |
| WaterGuru / Ondilo | $399 / $449 hardware | Readings in their apps | Varies | Not stated | Not stated |
FAQ
What is the best free pool app?
For exact dosing and a useful free tier, DoseMyPool and Pool Math are the two to try. DoseMyPool adds guided troubleshooting, reminders, and full pool, spa, and saltwater support, and keeps your data on your device with no account.
What is the best pool app for saltwater?
DoseMyPool handles saltwater and salt chlorine generators directly, alongside regular chlorine pools and hot tubs, so you can manage every body of water in one app.
Is there a private pool app with no account?
Yes. DoseMyPool needs no account and works offline. Your pool data stays on your device, so nothing sits on a company server.
Sources
- Trouble Free Pool, PoolMath. The full calculator and dosing are free; Premium is $7.99 a year for full history, multiple pools, and backup, sync and reminders
- Apple App Store, Pool Math by TroubleFreePool. Premium adds unlimited test log history, maintenance reminders, cloud sync, multiple devices, unlimited pool and spa setups, and CSV import and export
- WaterGuru, SENSE 3 product page. SENSE 3 lists at $399; no subscription, replacement cassettes sold separately
- Ondilo, ICO Pool product page. ICO Pool lists at $449 with no subscription; readings reach your phone over Wi-Fi
- Test Your Own Pool, Sutro Smart Pool Monitor review. Sutro, Inc. ceased operations; devices and the app stopped working after October 31, 2025
- Pool Supply Warehouse, Important Message for pHin Customers. Hayward ended the pHin service on December 20, 2021, and the monitor stopped measuring
- The Pool Nerd, Best Pool Water Monitors. Sutro's subscription and cartridges; WaterGuru has no subscription but cassettes at about $20 every 4–8 weeks
- DoseMyPool, Pricing. What the free tier and Premium include
Related
Stop guessing. Get the exact fix
DoseMyPool turns your test numbers into the precise doses and the safe order to add them. Free on the App Store.
DoseMyPool is independent and is not affiliated with, endorsed by, or sponsored by the other products named on this page. Product names and trademarks belong to their respective owners and are used only to describe and compare. Details reflect our understanding when written and can change, so check each product's current information before deciding.