Comparison

Pool Calc vs LaMotte WaterLink

LaMotte makes the Spin Touch and ColorQ meters that many pool stores and pros use, and WaterLink Home is the app that pairs with them for home owners. WaterLink Solutions PRO is its sibling for commercial pros. Pool Calc doesn't pair with any meter. It takes readings from any kit you type in, works without an account, and adds client tools for pros.

Prices, features and ratings checked on 28 October 2026.
App Store rating as shown on 28 October 2026: WaterLink Home: 4.6 stars from 85 ratings; WaterLink Solutions PRO: 2.9 stars from 21 ratings (US App Store).

The short answer

If you've invested in a LaMotte meter, WaterLink Home is the app that talks to it. If you test with anything else, or you look after more than five pools, Pool Calc gives you an ordered dose plan for your own products, a charted log, and pro tools on Plus or Pro, with no account.

At a glance

From each app's own App Store page and website, checked on 28 October 2026. "Not listed" means we found no mention of it there, not that the feature is missing.
Feature	Pool Calc	WaterLink Home
Price	Free for one pool; Plus or Pro for more	Free
Bluetooth meter import	No	Yes LaMotte ColorQ 2x, Spin, Pulse
Read strips from a photo	No	Yes Some LaMotte Insta-TEST strips
Manual entry from any kit	Yes	Yes Custom test results
Treatment plan	Yes Ordered plan with amounts	Yes Step-by-step recommendations
Your own chemicals and strengths	Yes Any brand, any strength	Yes Customizable chemicals and dosage rates
Bodies of water	1 free; 5 on Plus; unlimited on Pro	Up to 5 (pool, spa or aquarium)
Test history	Yes With charts	Yes With charts and graphs
Water balance (CSI)	Yes	Not listed
Share with a pool professional	Yes PDF and CSV export	Yes Homelinks to WaterLink Solutions PRO accounts
Share your log with family members	No	Yes Friends & Family sharing
Account to sign up for	None	Free account required
Clients, route and service reports	Yes Plus and Pro	Not listed for Home; the PRO app manages properties, contacts and sites
Works offline	Yes	Not listed
Platforms	iPhone (iOS 18 or later)	iPhone, iPad (iOS 15 or later)

Pricing

Our app

Pool Calc

Free$0Every feature for one pool and its attached spa.
Plus$1.99 a month, $14.99 a year or $39.99 onceUp to 5 pools plus the pro tools. 1-week free trial on the yearly plan.
Pro$9.99 a month or $79.99 a yearUnlimited pools plus the pro tools. 1-month free trial on the yearly plan.

Prices on the App Store at launch. Pricing is per person, not per pool.

Meter companion app

LaMotte WaterLink

WaterLink HomeFree (free account)Works with LaMotte ColorQ 2x, Spin, Pulse and some Insta-TEST strips, or manual entry. Up to 5 bodies of water: pool, spa or aquarium.
WaterLink Solutions PROFree appFor commercial professionals using a WaterLink Solutions PRO account. The listing mentions an optional monitoring add-on managed on the web.

Both apps are free on the App Store with no in-app purchases listed. LaMotte meters and strips are sold separately.

Prices as listed on 28 October 2026. Source

The WaterLink apps are free; the cost is the LaMotte meter or strips that feed them. Pool Calc works with the kit you already have and is free for one pool.

Any kit, typed in once

If you own a Spin Touch, WaterLink's Bluetooth link saves typing, and that's a real advantage. If you use a drop kit, strips from any brand, or a meter from another maker, Pool Calc takes the results on one screen with a number pad and "Same as last" for slow readings like CYA and calcium.

Past five pools

WaterLink Home lists up to 5 bodies of water. Pool Calc Plus also covers 5, and Pool Calc Pro covers unlimited pools with client cards, a route in your own order, a one-screen stop and a PDF report with your logo, all on the phone.

No account to keep your log

WaterLink Home asks you to create a free account. Pool Calc doesn't have accounts: your log lives on your phone and backs up to your own iCloud.

What WaterLink Users Complain About

Paraphrased from public reviews. Each one links to where it was posted and gives the month it was written.

Readings lost mid-test. A July 2025 WaterLink Home reviewer said the app sometimes switched pages or timed out during testing and lost readings, and asked for a way to pause and resume (App Store review, July 2025).

Pool Calc approach: test entry is saved as a draft on every change and restored if the app is closed. Close saves the test, with Undo.
Slow Bluetooth after an update. A WaterLink Home reviewer reported "significant lag in Bluetooth connection" to their ColorQ 2x after an update (App Store review, June 2026). LaMotte replied asking for a bug report.

Pool Calc approach: no pairing step. That means no Bluetooth convenience either: you type the numbers.
Pro app: camera blocked during a job, and login loops. WaterLink Solutions PRO reviewers say a pop-up stops them reading a strip while in a job, and that the app got stuck trying to log in (App Store reviews, April 2026).

Pool Calc approach: no login, and the stop screen holds readings, doses, tasks, photos and notes on one screen.

When LaMotte WaterLink is the better choice

You own a LaMotte Spin Touch, ColorQ or Pulse and want results sent to the app over Bluetooth.
Your pool store or service pro uses WaterLink Solutions PRO and you want to link to them with Homelinks.
You test an aquarium as well as a pool or spa.
You work for a commercial operation already set up on WaterLink Solutions PRO.

Questions people ask

What app does the LaMotte Spin Touch use?

LaMotte's WaterLink Home app lists LaMotte Spin among its supported devices, and its version notes mention Spin Touch. For professionals, WaterLink Solutions PRO names WaterLink Spin Touch with Bluetooth transfer. Both were free on the App Store on 28 October 2026.

Can Pool Calc read my Spin Touch over Bluetooth?

No. Pool Calc doesn't connect to meters. You type the meter's results into one screen, which takes a few seconds, and Pool Calc gives the dose plan.

Is there an alternative to WaterLink for more than 5 pools?

WaterLink Home lists up to 5 bodies of water. Pool Calc Pro covers unlimited pools for $9.99 a month or $79.99 a year, with clients, a route and service reports, on the App Store at launch.

More comparisons

All comparisons

References

LaMotte, WaterLink, Spin Touch, ColorQ, Pulse and Insta-TEST are trademarks of their respective owners. Pool Calc is not affiliated with them. Information checked on 28 October 2026; prices and features change. Corrections: [email protected]