Comparison

Blue Trails vs Depth.

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Blue Trails

Read full description

Blue Trails is a free scuba diving app and digital dive log, built by divers. Log every dive, find your next dive site, explore wrecks in 3D and share your dives with your buddies. YOUR DIVE LOG, DONE RIGHT Keep a complete record of every dive: depth, bottom time, visibility, water temperature, tank, gas and nitrox mix, weights and more. Import dives from your dive computer files, add photos and videos, and export your whole logbook to PDF. GOT AN OLD PAPER LOGBOOK? Take a photo of a page and Blue Trails reads your dives and adds them to your digital logbook. Your whole diving history, finally in one place. FIND YOUR NEXT DIVE SITE Browse thousands of dive sites on the map, read reviews from other divers and rate the spots you have been to. Each site shows its depth, coordinates and the marine life you can expect to see there. EXPLORE WRECKS IN 3D Many wrecks come with a 3D model. Spin it, zoom in and plan your route before you get in the water. Filter the map to see wrecks only. KNOW WHAT LIVES THERE Photos, size, conservation status and a short description for each species, in your language. A LOGBOOK OTHER DIVERS CAN TRUST Ask instructors, dive centers or buddies to validate your dives and build a verified dive history. ALL YOUR DOCUMENTS IN YOUR POCKET Store your diving certifications, insurance and medical record in the app. Link with your dive center so they have your details before you arrive, and revoke access any time. SEE HOW YOUR DIVING ADDS UP Stats with records, yearly charts and air-consumption trends. Earn achievement badges as your logbook grows. DIVE WITH YOUR BUDDIES Follow other divers, join dive groups, share dives so your buddies can add them to their own logbook, and share your profile with a QR code. NOT TIED TO ANY BRAND Sign in with your email, Google or Apple in seconds. Blue Trails is not tied to any dive computer manufacturer. You decide who sees your dives, and your data is yours. Terms of Use (EULA): https://bluetrails.eu/policy.html?policyUUID=d7d44a2b-1df1-4d8c-ac46-3dbf7b4f3a7e

About

Depth.

Features
Read full description

Depth. is your dive log for iPhone. Simple, fast and beautiful. LOG EVERY DIVE Location, depth, dive time, water temperature, visibility, equipment, weights and buddy all in one place. Dives are automatically saved to your account. MARINE SPECIES Save species you encounter during your dive. Depth. has an extensive catalog with photos and information about fish, coral and other underwater animals. BUDDY SYSTEM Send a dive directly to your buddy via their Depth ID. They will see your log appear in their timeline. AI ASSISTANT Ask questions about diving techniques, species or your equipment. The built-in AI assistant will help you further. EXPORT Download all your dives as JSON, CSV or XML compatible with other logbooks. IMPORT Do you dive via Diviac? Import all your existing dives with one tap. DESIGNED FOR DIVERS No subscriptions. No ads. Just a clean, quick logbook that you always have with you.

Screenshots

Blue Trails4 screens
Depth.4 screens

Verdict

The call

The clearest difference is in-app purchases: Depth. at none against Blue Trails's 3. Depth. also leads on ads (none vs shown). Blue Trails's advantage is update cadence (every 11 days vs every 5 weeks). On price, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Blue Trails sells 3 in-app purchases, starting at $14.99 per year. Depth. asks for nothing beyond the download.

UpkeepUpdate frequency

Blue Trails ships an update every 11 days, Depth. every 5 weeks. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

Scorecard3 real differences · 3 level
Blue Trails versus Depth.: the parameters behind the verdict, then further details
ParameterBlue TrailsDepth.
PriceFreeFree
Update frequencyEvery 11 days — betterEvery 5 weeks
AdsYesNo — better
In-app purchasesYesNo — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better16.0
Further details — not scored
Size121 MB2 MB
Age rating17+4+
DeveloperBlue Trails GmbHJosephus Fransiscus Zegers

In-app purchases

3 purchases

Blue Trails

Subscriptions3
  • Seahorse Subscription$14.991 Year
  • Turtle Subscription$54.991 Year
  • Shark Subscription$99.991 Year
None

Depth.

No in-app purchases

Questions

Is Blue Trails free?
Blue Trails is free to download, with in-app purchases available.
Is Depth. free?
Depth. is free to download, with no in-app purchases.
Do Blue Trails or Depth. have ads?
Blue Trails shows ads; Depth. does not.
Which is updated more often, Blue Trails or Depth.?
Blue Trails ships an update every 11 days, and Depth. every 5 weeks. Most recently, Blue Trails was updated on October 30, 2026 and Depth. on November 5, 2026.

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