Compare
Skimmer vs. Pool Math
The calculator app the Trouble Free Pool community trusts, built for a single reading at a time, not an ongoing log.
Pricing at a glance
What each one actually costs.
Skimmer
$19.99/ year
7-day free trial, cancel anytime
Pool Math
About $7.99/yr, per Pool Math's App Store listing (confirm the current price before buying)
Competitor pricing reflects publicly listed rates and can change without notice. Confirm the current price directly with Pool Math before buying.
Feature by feature
Skimmer vs. Pool Math, side by side.
| Feature | Skimmer | Pool Math |
|---|---|---|
| Chemical dosing calculator | ||
| Water test history over time | Single-reading calculator, no running log | |
| Chemical dosing log | ✗ | |
| Equipment lifecycle tracking (install dates, warranties, service history) | ✗ | |
| Maintenance task reminders | ✗ | |
| Resale-grade PDF export | ✗ | |
| Works offline, no account required | ||
| Price per year | $19.99 | ~$7.99 |
Why Skimmer
Where Skimmer pulls ahead.
- A full maintenance log, not just a calculator: every reading, dose, and task lives in one running history instead of a one-off result
- Equipment lifecycle tracking for your pump, filter, and heater, install dates, warranties, and service history
- A resale-grade, exportable PDF service-history report
- A modern native iOS interface built for 2026, not a design that's stayed largely the same for years
- Chemical dosing recommendations that account for what you've already added, not just a single calculation
Frequently asked
Questions about Skimmer vs. Pool Math
Is Pool Math free?
No, Pool Math is a paid app, priced at roughly $7.99/yr on its current App Store listing. It's inexpensive, but it isn't free. Vendor pricing can change, so confirm the current number on the App Store before buying.
Can I use Pool Math and Skimmer together?
You could, but you'd be running two apps for overlapping jobs. Pool Math is a calculator for a single test result; Skimmer logs that same chemistry over time, tracks the chemicals you actually dosed, and adds equipment and maintenance tracking Pool Math doesn't attempt. Most owners who try both end up settling on one.
Why switch from Pool Math if it already works?
Pool Math's calculator is solid, that's not in question. The gap is everything around it: it doesn't track your pump, filter, or heater's service history, doesn't export a PDF you can hand to a buyer, and doesn't log maintenance tasks. If a single reading is all you need, Pool Math is fine. If you want a full record of pool ownership, Skimmer covers more ground.
Does Pool Math track equipment or maintenance history?
Not in any meaningful way. Pool Math is built around chemistry calculations for a single test, not an ongoing maintenance or equipment log, which is the core difference in what the two apps are for.
Ready to switch from Pool Math?
7-day free trial, $19.99/yr after. No account, no ads, no backend to shut down.
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