Pool Math by TroubleFreePool vs Locker Ledger

PoolMath makes swimming pool care, maintenance and management easy by tracking chlorine, pH, alkalinity and other levels to help calculate how much salt, bleach and other chemicals to add. Keep swimming in your TroubleFreePool with Pool Math. Crystal clear algae free pool water is what Trouble Free Pool Math is committed to. Pool Math performs all the calculations you need to keep your chlorine, pH, calcium, alkalinity, and stabilizer levels balanced. Why choose Pool Math over the others? Other apps claim to make testing easy by using test strips and your phone's camera. Unfortunately, this is simply too good to be true. Test strips are notoriously inaccurate and end up costing you much more money in both chemicals and the tests themselves in the long run. Trouble Free Pool believes using a proper test kit is much easier, effective, and economical in the long run. By following these calculations the pool owner achieves and maintains crystal clear water without reliance on the often unproductive advice and unneeded expense from pool stores. Pool Math's great features include: • Calculators for pH, Free Chlorine, Calcium Hardness, Salt, Total Alkalinity, Calcium Hardness, Borates, CSI • Track Maintenance: Backwashing, Vacuuming, Filter Cleaning, Filter Pressure, SWG Cell %, Flow Rate • Track Chemical Additions • Track Weather conditions with your logs • Calculate the Effects of Adding chemicals to your pool • Bleach Price Calculator - Find the best deals on bleach easily • Summary page to see an overview of test results and chemical additions • Data backup / Export Premium Subscribers get access to these additional features: • Unlimited Test Log History Storage • Maintenance Reminders • Cloud Sync/Backup • Sync across multiple devices • Unlimited Pool / Spa Configurations • Test Log CSV Import / Export Pool Math Premium Subscription details: • Auto-renewable subscription • 1 year for $7.99 USD • Your subscription will be charged to your iTunes account at confirmation of purchase and will automatically renew (at the duration of 1 year) unless auto-renew is turned off at least 24 hours before the end of the current period. • Current subscription may not be cancelled during the active subscription period; however, you can manage your subscription and/or turn off auto-renewal by visiting your iTunes Account Settings after purchase. • Privacy Policy & Terms of Use: http://poolmathapp.com/privacy/

Locker Ledger is the safest way to track what's inside your bank locker - jewelry, documents, cash, bonds, and more. Everything you add is encrypted with AES-256-GCM before it ever touches your device's storage. Your data never leaves your phone. No cloud sync. No account. No subscription. Just a private, secure record that only you can open. WHAT YOU CAN DO - Add items with a name, category, photo, and description - Mark items IN or OUT of your locker with a single tap - each toggle records a timestamp - Log every locker visit with an optional note - Set a reminder to visit your locker every 1, 3, 6, or 12 months - See insights: items by category, locker health score, visit streak, average visit interval - Export a complete encrypted backup (.llbackup) and import it on a new device - Search and filter by status or category in seconds SECURITY - HOW IT WORKS - AES-256-GCM encryption applied before writing anything to storage - Encryption key stored in Apple's Keychain (Secure Enclave-backed), never in plain UserDefaults - Face ID or device PIN required every time the app opens - Optional custom passphrase (in settings): derive your own 256-bit key using HKDF-SHA256 for an extra layer of protection - Zero telemetry. Zero analytics. Nothing is ever transmitted. PRIVACY FIRST Locker Ledger does not collect, transmit, or share any personal data. Your locker contents, photos, and visit history exist only on your device in encrypted form. Backups are self-contained encrypted files that you control entirely. DISCLAIMER The IN / OUT status in Locker Ledger reflects only what you have manually recorded in this app. It does not verify or guarantee the actual physical location of any item. Always confirm your locker contents in person.