Reef vs Interval

Every dive deserves a beautiful record. Reef is the simplest, cleanest scuba diving logbook for iOS — built for recreational divers who want their dive history to look as good as it felt underwater. LOG YOUR DIVES Depth, duration, water temp, visibility, air consumption, tank pressure, dive site and notes. Tap in at the surface while it's fresh. Works fully offline on liveaboards and remote reefs. TRACK YOUR STATS Total dives, deepest dive, longest bottom time and top dive sites by count. Watch your logbook grow with every trip. ATTACH PHOTOS Turn each dive entry into a visual story. Add photos straight from your camera roll to any log entry. DIVE BUDDY Log who you dived with. Build your buddy history across every trip and location. DIVE SITES & MAP Pin exactly where you dived on a map. Open your dive map anytime to see every logged site across the world — your personal underwater atlas. GEAR LOCKER Store all your dive equipment in one place. Track service intervals by dive count and time — Reef tells you when your BCD, regulator, wetsuit or mask is due for a service before it becomes a problem. CERTIFICATIONS Store all your dive certifications in one place. See at a glance which are valid, expiring soon or expired — always ready to show at the dive centre. No social network. No subscription required to log dives. Just a beautiful, private logbook — always in your pocket. Compatible with PADI, SSI, NAUI, CMAS and all major certification agencies. Terms of Use (EULA): https://reeflogbook.app/terms

Your dives, beautifully remembered. Interval is a personal dive logbook for life underwater. Bring your recorded dive profiles, photos and memories together, then revisit them across your Apple devices. Free, with no subscriptions. IMPORT FROM YOUR DIVE COMPUTER. Bring recorded dives into Interval from a compatible dive computer in just a few taps. Support varies by model and connection. EXPLORE THE PROFILE. MOMENT BY MOMENT. Follow the descent and the way back up. Inspect depth, temperature and the other measurements your computer recorded, moment by moment. PHOTOS, NOTES AND DIVE BUDDIES. Add photos, videos, notes, tags and buddies to every dive. Record conditions and equipment, then choose a favourite moment as the cover. SEE YOUR STATISTICS AT A GLANCE. Look back on your dives, explore your statistics and see your time underwater add up. Return to favourite sites and see where you’ve dived on the map. FIND ANSWERS WITH APPLE INTELLIGENCE. Scan your dive logs with Apple Intelligence to find the answers you’re looking for. Beta. Requires Apple Intelligence on iOS 27, iPadOS 27 or macOS 27. ONE LOGBOOK, KEPT IN SYNC. Your dives, kept in sync across iPhone, iPad, Mac, Apple Watch and Apple TV through your own private iCloud. PRIVATE BY DESIGN. Interval has no accounts. No analytics, telemetry, advertising identifiers or tracking. YOUR LOGBOOK GOES WITH YOU. Share dive records with friends, or export your logbook as UDDF whenever you want. Free. No subscriptions. Just diving.