Comparison

Bloo vs Reef Tagger

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

Head to head
About

Bloo

Log your scuba dives with photos and detailed notes. This app allows you to record dive sites, depths, conditions, and certifications. It also supports importing data from other apps and offers an interactive world map of your dive locations.

Highlights
  • Offline dive logging
  • Attach photos to dives
  • Searchable dive site database
  • Track certifications
  • Import from other apps
  • Group dives into trips
  • Interactive world map
Read full description

Your dives, beautifully archived. Bloo is a dive journal for divers who care about the memory as much as the log. Built offline-first so you can log a dive at the boat, on the plane, or on the drive home - then sync the moment you're back on Wi-Fi. BUILT FOR THE POST-DIVE RITUAL • Log a dive in under 60 seconds: site, depth, time, conditions, rating. • Metric or imperial. Set it once, change it any time. • Attach photos from your camera roll as first-class memories, not afterthought attachments. • Search a catalogue of over 6,500 dive sites, or drop a pin on a new one. • Rename, merge, or remove any site you've added - including ones an import created for you. • Works fully offline. No spinner. No "try again later." • Track your certifications by agency and level, from Open Water to instructor. SCAN YOUR PAPER LOGBOOK • Photograph a page and Bloo reads the dives off it: date, site, depth, time, buddies, wildlife, notes. • Check every reading against the page before anything saves. Anything Bloo wasn't sure of is marked. • Your first 10 pages are free. Bloo Pro reads the rest. BRING YOUR DIVE HISTORY WITH YOU • Import straight from your dive computer: Garmin Descent and Suunto Ocean (.fit). • Or from another app: Subsurface, Shearwater, Oceanic+, MacDive and anything else that exports UDDF - your dives, sites, buddies and gear. • Pick several files at once. Bloo skips the dives it already has, so nothing lands twice. • Check every dive site before anything saves - link it, rename it, or keep it separate. • Tap a .fit or .uddf file in Files, Mail or AirDrop to open it straight in Bloo. EVERY DIVE IS A STORY • Group dives into trips so every adventure lives as one memory. • Revisit any dive with the photos, notes, and conditions you captured that day. • Note what you saw: log the wildlife on any dive. • Scrub through your depth, temperature and tank-pressure profile on computer-logged dives. • Lifetime stats: bottom time, depth records, countries dived, dives per year. DIVE WITH FRIENDS • Add the buddies you dived with, and tag your instructor or divemaster. • Invite a buddy to connect. Once you both say yes, you see each other's dives. • Tag a buddy on a dive you did together and they can add it to their own logbook in a tap. • Keep any dive private with a single switch. Private dives never leave your logbook. • Buddy Wrapped: a beautiful, shareable recap of your history with each buddy. Free for everyone. SEE EVERYWHERE YOU'VE BEEN • An interactive world map pins every site you've dived. Zoom in on a region and replay the trip, or search to jump straight to a country or a named site. BLOO PRO The free tier is a full logbook - not a trial, not a teaser. Most divers will never need more. Bloo Pro unlocks: • 50 photos per dive (up from 6) • Videos on every dive (up to 5) • Year-by-year stats: compare any year, any depth • Your whole paper logbook, scanned (10 pages free) YOUR DATA IS YOURS Import or export your entire logbook as JSON or UDDF, the open dive-log format your past and future software will still read. Private-only media storage with signed-URL access. Log your first dive tonight, or bring a lifetime of them with you, and bring your dive buddies too. Your future self will thank you. --- Bloo is fully functional without a subscription. Bloo Pro is an optional subscription, billed yearly or monthly; the yearly plan has a 14-day free trial. Pricing shown in-app, localised to your region. Payment is charged to your Apple ID when you confirm the purchase, or at the end of the free trial on the yearly plan. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings. Terms of Use: https://www.divebloo.com/terms Privacy Policy: https://www.divebloo.com/privacy

About

Reef Tagger

Features
Read full description

Reef Tagger turns every dive into a discovery. Point your camera at any marine creature and our AI instantly identifies the species — fish, corals, rays, turtles, invertebrates, and more. Every tag builds your personal underwater journal and contributes to a growing record of ocean wildlife. IDENTIFY WITH AI Our two-pass identification engine analyses your photo and returns the species name, scientific name, confidence rating, and the distinguishing features used to make the call. When the image needs more detail, the app tells you exactly that. LOG EVERY DIVE Create dive logs that capture your sightings, locations, and photos in one place. Tag multiple species per dive and build a catalogue of everything you've ever encountered underwater. COLLECT SPECIES STAMPS Every new species you identify earns a beautifully rendered collector's stamp — a photorealistic 3D portrait unique to that creature. Build your collection one dive at a time. FIND DIVE SITES Search for dive sites shared by the community. See what species others have found there and add your own sites to the map. CONNECT WITH DIVERS Follow other divers, like and comment on their sightings, and see what's being tagged around the world in your social feed. Share publicly or keep sightings just for friends. CLIMB THE LEADERBOARD Compete on weekly, monthly, and all-time leaderboards. Every species you tag earns your place in the rankings. PRIVACY FIRST Control who sees your sightings, your profile, and your dive site locations. Share as much or as little as you choose. Reef Tagger is built for scuba divers, snorkellers, free divers, and marine enthusiasts at every level. Every sighting counts.

Screenshots

Bloo4 screens
Reef Tagger4 screens

Verdict

The call

The clearest difference is in-app purchases: Reef Tagger at none against Bloo's 1. Reef Tagger also leads on device support (3 vs 1). On price, update cadence, ads 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. Bloo sells 1 in-app purchase, starting at $34.99 per year. Reef Tagger asks for nothing beyond the download.

UpkeepUpdate frequency

Bloo ships an update weekly, Reef Tagger every 5 days. The most recent releases landed on October 31, 2026 and November 10, 2026 respectively.

Scorecard2 real differences · 8 level
Bloo versus Reef Tagger: the parameters behind the verdict, then further details
ParameterBlooReef Tagger
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings3 — better—
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFreemium—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.415.1 — better
Further details — not scored
Size112 MB75 MB
Age rating4+17+
DeveloperLuke KidneyCool Coral Labs Limited

In-app purchases

1 purchases

Bloo

Subscriptions1
  • Bloo Pro14 Days trial$34.991 Year
None

Reef Tagger

No in-app purchases

Questions

Is Bloo free?
Bloo is free to download, with in-app purchases available.
Is Reef Tagger free?
Reef Tagger is free to download, with no in-app purchases.
Do Bloo or Reef Tagger have ads?
Neither Bloo nor Reef Tagger shows ads.
Which is updated more often, Bloo or Reef Tagger?
Bloo ships an update weekly, and Reef Tagger every 5 days. Most recently, Bloo was updated on October 31, 2026 and Reef Tagger on November 10, 2026.

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