ReefCompanion vs ReefKeep

ReefCompanion makes it easy to track, understand, and care for your reef aquarium. Log water tests, monitor trends, manage equipment, and stay on top of maintenance—all in one clean, intuitive app designed for reef keepers of every experience level. Whether you’re maintaining a nano reef or a full mixed‑reef system, ReefCompanion helps you keep your tank stable, organized, and thriving. Key Features • Fast, simple water test logging Record Calcium, Alkalinity, Magnesium, Nitrate, Phosphate, Salinity, and more. Add notes and photos to track changes over time. • Beautiful trend charts Visualize your tank’s stability with 7‑day, 30‑day, 90‑day, and all‑time graphs. Spot patterns early and make informed adjustments. • Equipment tracking Keep a clean list of pumps, lights, skimmers, controllers, and other gear. Perfect for maintenance planning and upgrade tracking. • Maintenance reminders Set recurring tasks like carbon changes, skimmer cleaning, filter swaps, and more. Never forget an important job again. • Livestock organization Track fish, corals, and inverts with notes and photos. Keep a history of additions, removals, and observations. • Clean, modern design Built for clarity and speed. No clutter, no ads, no accounts required. Why ReefCompanion? A healthy reef depends on consistency. ReefCompanion brings your tank’s data together so you can make better decisions, catch issues early, and enjoy the hobby with confidence. Everything is stored privately on your device. No logins, no cloud accounts—just your reef, your data.

ReefKeep is a modern, private tracker for saltwater and freshwater aquariums — built for hobbyists who want fast logging and proactive insights, not just prettier graphs. WHAT YOU CAN DO • Log 8 parameters in under a minute with a clean one-screen entry • Scan Hanna Checker readings with the camera — no more transcribing numbers • Track alkalinity, calcium, magnesium, nitrate, phosphate, pH, salinity, temperature and any custom parameter you care about • See trends as native charts with your target ranges overlaid • Schedule recurring tasks (water changes, filter swaps, skimmer cleaning) with local reminders • Record livestock with timelines for spawning, fragging, moves and notes THE INSIGHTS ENGINE Other apps show you numbers. ReefKeep tells you what they mean. • Trend alerts — "Alkalinity has fallen 8% over your last 5 tests" • Correlation hints — "Alk and calcium are both dropping. Check your 2-part dosing." • Stale data warnings — "You haven't tested nitrate in 12 days" • Smart water-change recommendations based on your actual nitrate trajectory, not a fixed schedule Everything runs on your device. Nothing leaves your phone unless iCloud sync is enabled. ASK THE ON-DEVICE COACH With Apple Intelligence (iPhone 15 Pro and later), tap any insight and get a plain-language explanation grounded in your own tank's readings — all processed on-device, no accounts, no servers. BUILT FOR REEFERS • Dark mode first — matches how you actually use the app next to a lit tank • Dual units everywhere: L/gal, °C/°F, ppt/SG, dKH/meq/ppm • Multiple tanks (Pro) • iCloud sync across your iPhone and iPad — included, not an upgrade • Zero ads, zero tracking SDKs, zero account required PRO UNLOCKS • Unlimited tanks • Unlimited parameter history • Insights engine • CSV export for your records • Photo galleries • Apple Watch (coming soon) Monthly and yearly subscriptions, or a one-time lifetime unlock if you prefer to own your tools. ReefKeep is built by a small team that uses it on their own tanks. We're not trying to be everything for every hobby. We're trying to be the tool you open once a week without thinking, and the app that catches a problem before it costs you a fish. The app applies the standard Apple Terms of Use (EULA) https://www.apple.com/legal/internet-services/itunes/dev/stdeula/