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Log your dives in seconds. Know your limits before the next one.

The free dive log for recreational divers.
Three taps to log a dive, real residual nitrogen before the next one,
and all your stats, sites, gear and certifications in one place.

100% free, no credit card
Start logging free

Join the revolution.
Divers already love Depthlog.

Why divers choose Depthlog

Fast dive logging

Log every dive in seconds

Open Depthlog on the boat and log the dive in three taps, under 20 seconds.
Save a dive site once: its coordinates, depth and conditions come back next time.

  • 3 taps, under 20 seconds
    Pick the site, confirm, save. No forms to fight while your tank is still wet.
  • Your sites, ready to reuse
    Save a spot once. Coordinates and site details come back on every log.
  • Built for the boat
    Mobile-first web app. Nothing to install, nothing to sync, no wet paper to lose.
Logging a dive in Depthlog on a phone
Repetitive dive planning

Know your real limits before every dive

Enter your first dive, the surface interval and your next depth.
Depthlog returns your pressure group, your residual nitrogen penalty and the bottom time you actually have left.

Built on standard recreational dive tables. Air and Nitrox up to EAN40. Free, no account needed.

  • SAC calculator
    Compute your true Surface Air Consumption with an advanced algorithm.
  • Nitrox calculator
    Compare Nitrox with air and see the pros and cons of enriched air.
  • Best Nitrox mix
    Find the optimal oxygen percentage for your target depth.
  • CNS oxygen clock
    Track cumulative CNS oxygen exposure across multiple dives.
  • Tank autonomy
    See how long your tank lasts at a given depth based on your SAC rate.
  • Minimum gas
    Calculate your rock bottom turn pressure for a safe ascent.

Repetitive dive planner

Live preview
m
min
min
m
min
Start NADive 1 ends HAfter 120 min → GDive 2 ends K
Residual penalty (RNT)
+49 min
Nitrogen carried from dive 1, in minutes at 15 m
NDL at 15 m
92 min
Max bottom time for a first dive at this depth
Available bottom time
43 min
NDL minus your residual penalty
You have 43 min of bottom time left at 15 m
Planned bottom time 24 min plus a +49 min residual penalty. About 19 min to spare.
Open the full planner
Dive sites and map

Your dive sites, ready to reuse

Save the spots you dive once, then log a dive there in one tap.
Share a site with a buddy, or flip to the map and see your whole diving footprint.

Saved diving sites in Depthlog
Analytics and insights

Watch your diving improve

SAC going down. Bottom time managed better. CNS kept in check.
Depthlog turns your logs into trends you can act on, the way you already expect from Strava and Garmin.

Buddies and sharing

Dive together, log together

Tag your dive buddies: they get the dive ready to save, every field already filled.
Invite your group, share dive sites, and keep a shared record of your trips.

  • Buddy tags, auto-filled
    Tag a buddy and the dive is ready to save in their logbook, no retyping.
  • A profile worth sharing
    Public profile, statistics and maps, ready to post or send to the group.

S

Equipment tracker

Keep your gear under control

Track regulators, tanks, wetsuits, computers and fins.
Depthlog remembers the last service, computes the next revision and reminds you before it is due, so nothing catches you off guard before a trip.

  • Never miss a revision
    Depthlog computes the next service date and flags every piece of gear as OK, due soon or overdue.
  • Service history per item
    What was done, when and by whom, for every regulator, tank and wetsuit you own.
Equipment list with revision dates in Depthlog

Track gear from all major brands

AqualungScubaproMaresCressiApeksAtomic AquaticsOceanicSuuntoShearwaterSeacHollisPoseidonZeagleHalcyonDive RiteTeclineXDeepScubaone
AqualungScubaproMaresCressiApeksAtomic AquaticsOceanicSuuntoShearwaterSeacHollisPoseidonZeagleHalcyonDive RiteTeclineXDeepScubaone
AqualungScubaproMaresCressiApeksAtomic AquaticsOceanicSuuntoShearwaterSeacHollisPoseidonZeagleHalcyonDive RiteTeclineXDeepScubaone
AqualungScubaproMaresCressiApeksAtomic AquaticsOceanicSuuntoShearwaterSeacHollisPoseidonZeagleHalcyonDive RiteTeclineXDeepScubaone
Diving certificates vault

Your certifications, one link away

Centralize every certification from the major agencies.
Share a public certificate page with a single link: anyone can open it and download the card image.

  • One link per certificate
    No more searching the phone gallery for a photo of your card.
  • Download-ready image
    Anyone with the link can download a clean certificate card.
Public diving certificate page in Depthlog

Supports the most famous diving agencies

PADISSICMASFIPSASNAUIBSACSDI/TDI/ERDIRAID
PADISSICMASFIPSASNAUIBSACSDI/TDI/ERDIRAID
PADISSICMASFIPSASNAUIBSACSDI/TDI/ERDIRAID
PADISSICMASFIPSASNAUIBSACSDI/TDI/ERDIRAID
Easy migration to Depthlog

Import and export your logs

You have all of your logs in an external application?
No problem, with Depthlog you can use the import system to migrate all of your logs using different formats.

How can I import my logs?

Dive computers often use proprietary software, but with the free Subsurface application you can read logs from computers and import them into Depthlog using various supported formats.

Supports the most diffused log formats

trat profile

FAQs

Depthlog is 100% free

Create your account and log your first dive in three taps. No credit card, no trial, no limits.