LSI Pool and Spa Calculator vs PoolCalc

You put care into every pool and spa you look after. Thank you for using LSI Pool and Spa Calculator. Your attention to water testing matters, and this app helps you keep readings, customer details, and service visits organized. Whether you maintain your own spa or look after several properties, bring your water balance calculator and service log together. Enter measured values, check the Langelier Saturation Index, and keep a useful record for your next visit. CHECK POOL AND SPA WATER BALANCE - Calculate LSI from measured pH, water temperature, calcium hardness, total alkalinity, and total dissolved solids. - See the calculated saturation pH and a result category. - Review whether readings suggest a scale or corrosion tendency. - Work in Fahrenheit or Celsius and convert the entered temperature when switching units. - Find the formula, measurements, and result ranges in Help. KEEP READINGS YOU CAN FIND AGAIN - Save measurements under reusable pool, spa, and property names. - Record dates and notes about water condition, treatments, or follow-up work. - Search saved history by site, result category, or notes. - Sort readings, correct saved inputs, and recalculate after an edit. - Duplicate a record for another visit. - Review a reading beside the records list on wider iPad layouts. PLAN AND RECORD SERVICE VISITS - Schedule visits for a saved pool or spa site. - Add a technician, visit status, and completed-work checklist. - Record actual chemical actions, service observations, and customer notes. - Link a saved water reading or enter fresh measurements for the visit. - Preview a service report before saving. - Keep an unfinished new visit as a local draft. - Note the next service or retest date and book a separate visit when ready. KEEP CUSTOMERS AND SITES CONNECTED - Save customer names, companies, phone numbers, emails, addresses, and notes. - Add customers manually or choose contacts to copy from Apple Contacts. - Link several sites to one customer and give each site its own address. - Keep local contact edits separate from device Contacts. - Find mapped sites using their address or a linked customer's address. - Search the site list even when a property still needs an address. REVIEW CHANGES OVER TIME - Explore charts for LSI, pH, temperature, hardness, alkalinity, and TDS. - Compare minimum, maximum, and average measurements. - Review history by customer or individual site. - Filter readings by result category. - Use Quick Calc for a check outside saved site history. - Set a weekly testing goal and review milestones in Habits & Progress. USE INPUT TOOLS THAT FIT THE JOB - Reset a form or search from its three-line menu. - Share current field labels and values, including an unfinished form. - Expand Details when you need guidance and keep notes in their fields. - Enable Sample Data or Randomize in Settings when you want practice inputs. Both start off. - Choose Light, Dark, or system appearance. TAKE YOUR RECORDS WITH YOU - Export readings, sites, contacts, or service visits as CSV or PDF. - Save JSON backups and review processing limits before relying on a backup. - Use Apple Watch for independent LSI calculations, local saved readings, and sharing. Watch readings do not sync with iPhone. The free iPhone app supports up to five saved readings. LSI Pro adds a larger reading allowance, spreadsheet review, backup import, and individual text and PDF reports. Watch calculation, saving, and sharing are free. Use reliable water tests alongside equipment and treatment guidance. LSI describes saturation tendency; it does not calculate chemical doses. Keep testing, keep good notes, and head into your next visit prepared. Monthly Pro is a 1-month auto-renewable subscription. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

This calculator helps you determine the scaling potential of your pool water by using the Langelier Saturation Index. Save and edit readings. Save and edit locations. Add notes to each reading. Quick add button. Add readings to locations with a single tap. If you are a pool professional then with a paid upgrade you will be able to save multiple locations for your pool route. I want to make this app something that you will use and see a benefit from. If there is something that you wish to see added please use the feedback form in the app and let me know!