Pool Buddy

Pool Buddy is the simple, professional way to test, track and balance your pool and spa water chemistry — built for pool owners, hot tub owners, service technicians and facility managers. Enter your test readings and Pool Buddy instantly calculates the Langelier Saturation Index (LSI) — the industry-standard measure of water balance — and tells you at a glance whether your water is balanced, corrosive or scale-forming. WATER CHEMISTRY CALCULATOR • Enter pH, total alkalinity, calcium hardness, temperature and TDS • Optional free chlorine and total chlorine readings, with combined chlorine calculated for you • Instant LSI result with a clear status: corrosive, balanced or scaling • Know exactly when your pool or spa water needs attention TEST HISTORY & RECORD KEEPING • Every test is saved automatically to your personal test log • Search and filter by pool location, water balance status or date • Perfect for pool technicians managing multiple client pools • Ideal for hotels, gyms, holiday lets and apartment complexes that need water quality records • Pool name and location fields remember your previous entries for fast repeat testing BUILT-IN MAINTENANCE TIMER • Handy countdown timer for timed pool maintenance tasks • Great for test strip wait times and dosing routines DESIGNED FOR REAL-WORLD USE • Clean, fast interface — log a test in seconds • Light and dark mode for bright poolsides or dim plant rooms • Your data is saved securely to your account and synced across sessions WHO IS POOL BUDDY FOR? • Home pool owners who want professional-level accuracy • Hot tub and spa owners keeping their water safe and comfortable • Pool service technicians who need quick testing and reliable records • Facility and leisure managers responsible for commercial pool compliance WHY WATER BALANCE MATTERS Unbalanced water damages pool surfaces, corrodes heaters and pipework, causes cloudy water and scale build-up, and makes swimming uncomfortable. Regular testing with LSI analysis helps you protect your pool equipment, save money on chemicals and repairs, and keep your water safe and crystal clear. Download Pool Buddy today and take the guesswork out of pool care.