Supported Features
-
VoiceOver
-
Voice Control
-
Larger Text
-
Dark Interface
-
Differentiate Without Color Alone
-
Sufficient Contrast
-
Reduced Motion
Bottomtime: Dive Logbook
Scuba Journal, Sites & Gear
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Now with Apple Health & dive-computer import, open UDDF/CSV/PDF export, and gear-service reminders — all offline-first. Your logbook, your data.
Bottomtime is the dive logbook that belongs to you — beautiful, fast, and offline-first. Log a dive in 30 seconds, watch your sites map fill up, and keep your whole diving life in one place. No account required. Your data is yours.
WHY DIVERS SWITCH TO BOTTOMTIME
• Offline-first: log on the boat, the liveaboard or the cenote — no signal needed. Everything syncs when you're back.
• Log a dive in 30 seconds: site, depth, time, gas, buddy, conditions — fast, or as detailed as you like.
• Your sites on a map: every dive plotted, your personal underwater passport.
• Species log included — names and sightings are never behind a paywall.
FREE, AND GENEROUS
• Unlimited dive log with photos
• 30-second quick log and a full detailed editor
• Career stats: dives, max depth, total bottom time
• Dive sites map
• Marine species log with common names
BOTTOMTIME PRO — automation and comfort, never your data
• Import from Apple Health and dive computers (depth, duration) — no double entry
• Import and export open formats: UDDF, CSV, PDF
• Automatic iCloud sync across iPhone and iPad
• Advanced stats and trends: SAC/RMV, average depth, progression over time
• Gear tracking with service reminders
• Species photos and history
• PDF logbook export with instructor signature
• Surface interval and no-fly planner (informational)
• Home Screen widgets
BUILT FOR EVERY DIVER
Recreational, technical, freediver or snorkeler — multi-cylinder, nitrox and trimix, safety stops, and metric or imperial units.
YOUR DATA, YOUR RULES
No account needed. Works fully offline. Export to UDDF, CSV and PDF anytime — your dive history is never locked in.
Premium is available as a monthly or yearly subscription (with a 7-day free trial on the annual plan) or a one-time lifetime unlock. Free features stay free, forever.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://develak.com/privacy-policy/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Develak, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
The developer indicated that this app supports the following accessibility features. Learn More
Information
- Seller
- PRIOMAT LLC
- Size
- 6.7 MB
- Category
- Sports
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 43 more
- English, Arabic, Bengali, Catalan, Croatian, Czech, Danish, Dutch, Finnish, French, German, Greek, Gujarati, Hebrew, Hindi, Hungarian, Indonesian, Italian, Japanese, Kannada, Korean, Malay, Malayalam, Marathi, Norwegian Bokmål, Oriya, Polish, Portuguese, Punjabi, Romanian, Russian, Simplified Chinese, Slovak, Slovenian, Spanish, Swedish, Tamil, Telugu, Thai, Traditional Chinese, Turkish, Ukrainian, Urdu, Vietnamese
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Bottomtime Pro — Lifetime $79.99
- Bottomtime Pro — Yearly $29.99
- Bottomtime Pro — Monthly $4.99
- Copyright
- © 2026 Develak