# Reef — Scuba Diving Logbook > Offline-first scuba diving logbook for iOS and Android. Log dives, photos, gear, certifications, and stats. Works fully offline; syncs across devices on the Pro plan when online. Reef is a focused dive log built for divers who actually dive on liveaboards, remote islands, and anywhere without reliable internet. No ads, no trackers, no data sold. Free up to 25 dives; Reef Pro unlocks unlimited dives and cloud sync. ## About - [Homepage](https://reeflogbook.app/): Feature overview, screenshots, and download links - [Changelog](https://reeflogbook.app/changelog.html): Release history, v1.0.0 through v1.0.4 ## Docs - [Support / FAQ](https://reeflogbook.app/support.html): Common questions on exports, subscriptions, offline mode, account management - [Privacy Policy](https://reeflogbook.app/privacy.html): How Reef handles your dive log data - [Terms of Service](https://reeflogbook.app/terms.html): Subscription and usage terms ## Optional - [llms-full.txt](https://reeflogbook.app/llms-full.txt): Full plain-text dump of the site (homepage, FAQ, changelog) in one document ## Facts - Platforms: iOS, Android - Free tier: up to 25 dives, every feature included, local storage only - Reef Pro: unlimited dives plus cloud sync across devices; 7-day free trial; subscription via App Store or Google Play - Languages: English, German, Spanish, French, Italian, Japanese, Korean, Thai (8 languages as of v1.0.4) - App Store: https://apps.apple.com/app/id6761029175 (app ID 6761029175) - Google Play: https://play.google.com/store/apps/details?id=com.reeflogbook.app - Developer: Anton Usov (individual developer, Austria) - Contact: support@reeflogbook.app