My Pool Expert - The free app for pool & whirlpool

The smart app that eases your pool maintenance

My Pool Expert, the new free pool app by BAYROL, launches on 15th April 2026 – for iOS, Android and PC. Create your personal profile and receive care recommendations tailored precisely to your pool or hot tub. The app accompanies you throughout the entire bathing season: enter your water values, receive instant dosage recommendations and keep track of your measurement history. Should you have any questions, the integrated intelligent BAYROL Assistant is available around the clock.

From 15th April 2026 – free to download.

Download now for iOS
Download now for Android
Open the PC version

Clear water – it's that simple! Your personal pool advisor is always at hand.

My Pool Expert works in 3 steps

1

Set up your pool or whirlpool

Enter your details once: water volume, filter type, disinfection method and pool type. The app then knows your pool and tailors all recommendations precisely to it.
2

Enter your water values

Test your water using test strips, a manual pool tester or the electronic BAYROL pool tester, then enter the values into the app. Handy: with the electronic BAYROL pool tester, the readings can be transferred automatically to the app via Bluetooth.
3

My Pool Expert takes care of the rest

My Pool Expert analyses your values instantly and tells you exactly: which products you need, in what quantity and in what order. This keeps your pool or hot tub crystal clear.

What Else the App Can Do

Long-term history of your water values

The app saves your measurements and shows you how your water values develop over the season. You can spot changes early and take targeted action before a small problem becomes a bigger one.
Intelligent BAYROL Assistant & Support

Questions about water care? The integrated assistant is available around the clock: clear, practical and drawing on the full breadth of BAYROL expertise. Those who prefer personal advice can contact the BAYROL support team directly through the app.
Everything tailored to your pool

The app knows your pool. All content, recommendations and guidance automatically adapt to your pool or hot tub type, your disinfection method and filter type. You always see exactly what you need at any given moment.
BAYROL Dealer Search

Find your nearest authorised specialist dealer for a professional on-site water test or the full product range directly within the app.

Why Regular Pool Water Analysis Matters

Clear and clean pool water doesn't happen on its own.

It requires regular monitoring. pH level, disinfection, alkalinity: these parameters influence one another. If one is off, the entire water balance suffers.
Keeping an eye on your water values saves you time, money and hassle in the long run – and simply makes for a better swim.
Typical consequences of neglect: cloudy or green water, chlorine odour, skin and eye irritation, limescale deposits on pool walls and equipment, or unnecessarily high product usage when resolving problems.

Learn more about the pool water analysis

The Most Important Water Parameters

The ideal pH level is between 7.0 and 7.4. If it's too high, the disinfectant loses effectiveness dramatically and limescale builds up. If it's too low, the water attacks materials, skin and eyes. The pH level is the first and most important step in any water care routine.
The TA value stabilises the pH level and prevents uncontrolled fluctuations. Ideal value: above 80 mg/l. A well-adjusted TA value makes the entire care routine significantly easier in the long run.
Without effective disinfection, water quickly becomes cloudy and hygienically questionable. The most common methods are chlorine (0.5 to 1.0 mg/l), bromine (1 to 3 mg/l) and active oxygen. Salt electrolysis is also widely used: chlorine is produced directly from the salt water. My Pool Expert takes your chosen method into account for all recommendations.
Cyanuric acid is often misunderstood. In fact, it acts like a protective shield: it prevents chlorine from being rapidly broken down by UV radiation and ensures it is released steadily into the water, rather than being consumed too quickly. Without a stabiliser, chlorine consumption in an outdoor pool would be several times higher.

The ideal range is between 30 and 50 mg/l; the value should not exceed 100 mg/l.

Find out more about cyanuric acid here: [Link: More on organic vs. inorganic chlorine]
Water hardness varies considerably by region and influences limescale formation. Ideal range: 7 to 14 °dH. Particularly relevant in areas with hard tap water or when filling your pool with well water. At elevated hardness levels and a pH above 7.6, Calcinex® is recommended as a preventive hardness stabiliser.

Water Reference Values at a Glance

Parameter	Ideal Value	Testing Interval
pH Level	7.0–7.4 (Chlorine/O₂) · 7.4–7.6 (Bromine)	1–2x per week
Free Chlorine	0.5–1.0 mg/l	1–2x per week
TA Value	> 80 mg/l	1x per month
Chlorine Stabiliser (CYA)	30–50 mg/l (max. 100 mg/l)	3–4x per season
Water Hardness (TH)	7–14 °dH	At the start of the season

Pool Water Testing: The Right Methods

Pool test strips (e.g. QuickTest)

The quickest method for weekly pool water testing. Simply dip into the water and compare the colour change against the colour scale. Available for chlorine and bromine care methods: QuickTest Cl-Br (chlorine/bromine).
Manual pool tester (pH/Cl or pH/O₂)

Reliable and easy to read. Fill with water, dissolve the tablet, read the colour. More accurate than test strips, though it typically measures only two parameters. Pooltester pH/Cl.
Electronic pool tester with Bluetooth transfer

The Electronic Pooltester from BAYROL measures pH level, free chlorine, total chlorine, bromine, TA value and chlorine stabiliser to one decimal place. A particular advantage: it connects exclusively to My Pool Expert via Bluetooth and can transfer all readings to the app at the press of a button.
Professional water analysis at a dealer

If the problem persists or you have any concerns, we recommend having the water tested by an authorised BAYROL dealer. Bring a water sample with you: you’ll receive a full analysis and personalised advice.
Find a dealer near you here.

Frequently Asked Questions about the My Pool Expert App

Yes, entirely. You can download My Pool Expert without registration from the App Store (iOS) or Google Play (Android), or use it directly in your browser at mypoolexpert.bayrol.de without any installation.
Yes. My Pool Expert supports both pools and hot tubs. Once your hot tub profile has been set up, you will receive only recommendations tailored to that type.
Yes. You can specify which dosing system you have installed within the app. My Pool Expert automatically adapts to this and delivers recommendations suited to your pool with a dosing system.
pH level and disinfectant content should be checked once or twice a week – more frequently during hot weather, periods of heavy use or after storms. Check the TA value at the start of the season and then approximately once a month thereafter. My Pool Expert will remind you in good time and provide tailored recommendations.
With the Electronic Pooltester from BAYROL, this is particularly straightforward: connect the device to the app via Bluetooth and transfer the readings at the press of a button. For other testing methods (test strips or manual pool tester), values are entered manually. This takes less than two minutes.

Download the My Pool Expert app!

Don't wait any longer!

My Pool Expert is completely free. Once set up, the app will guide you through the entire swimming season. Beginners appreciate the clear, step-by-step guidance, whilst experienced pool owners value the precise dosing recommendations.