Comparison

Diveplanner Tec & Rec vs Poseidon Reef

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

Head to head
About

Diveplanner Tec & Rec

Plan complex recreational and technical dives with advanced decompression models and multi-gas support. Log your dives, manage gas blends, and restore underwater photo colors. Syncs across Apple devices.

Highlights
  • Bühlmann ZH-L16C and Thalmann decompression models
  • Open circuit and CCR dive planning
  • Multi-gas decompression support
  • Contingency plan computation
  • Gas blending and cylinder management
  • Underwater photo color correction
  • Bluetooth dive computer data import
Features
Read full description

Diveplanner Tec & Rec plans recreational and technical dives, on open circuit or closed circuit rebreather (CCR), in a few taps, and keeps your logbook. PLAN • Bühlmann ZH-L16C decompression model with your gradient factors, or the Thalmann algorithm of the U.S. Navy: VVal-79 for air and nitrox, XVal-He-9 for heliox CCR dives; compare a plan with both • Open circuit and CCR, down to 300 m / 985 ft, in salt, fresh or EN 13319 water, at sea level or at altitude • Multi-level dives, multi-gas decompression with automatic or chosen switch depths • Contingency plans computed for you: deeper, longer, lost deco gas, GF 100 and the CCR bailout • Warnings for ppO2, END, gas density, isobaric counter diffusion, CNS and OTU • The decompression chart of each plan: the profile, the tissues' ceilings at GF 100 and at your gradient factors, the leading tissue • A dive day of as many repetitive dives as you need, with their surface intervals • Saved plans in folders, shared as files GAS • Describe your cylinders: the plan gives the pressure at the end of the dive, the turn pressure, the rock bottom and the maximum bottom time your gas allows • Gas needed by volume and weight, per gas TABLES • Dive tables by depth and bottom time for your own gases, gradient factors and conditions, with the previous dives of the day • Share or print the table as a PDF TOOLS • Gas blender: partial pressure blending of nitrox, trimix and heliox from what is left in the cylinder, ideal or real gas; the best mix for a depth from your ppO2, END and gas density limits, and the cylinder label • Tides: the tide of a day anywhere at sea, from the nearest NOAA tide station or the EOT20 global tide model, its high and low waters, and the tidal currents and slack waters of a nearby current station, read to the minute on the chart • Photo colors: restore the true colors of your underwater photos and videos, their blue or green cast, haze and missing red corrected, with the depth of your logged dive; compare before and after, then save or share LOGBOOK • Log your dives by hand, from a plan, or download them over Bluetooth from a Shearwater dive computer (Petrel 2, Perdix, Perdix AI, Nerd 2, Teric, Peregrine), with the profile, stops, gases and sensor values • Photos, dive sites on a map, statistics, tags, search and filters • Synchronised between your iPhone, iPad and Mac with iCloud • Export to UDDF, Subsurface, CSV, a PDF logbook and .divelog archives; import UDDF and Subsurface SHARE • Ready-to-cut dive schedules as a PDF, for your buddy or your slate: every plan, the gas and cylinders, CNS, OTU and warnings EVERYWHERE • iPhone, iPad and Mac • Metric or imperial units • In 12 languages, each with its user guide LICENCES • Rec, free: one gas, air or nitrox up to 40 %, down to 66 m / 210 ft • Tec Basic: up to 3 gases, nitrox up to 100 %, normoxic trimix and triox • Tec Advanced: unlimited gases and depth, hypoxic trimix • Try every feature free for 2 weeks Diveplanner is a planning aid. It does not replace training, experience, a dive computer or your own judgement: always dive within the limits of your certification.

About

Poseidon Reef

This app helps divers log, plan, and analyze their dives. It offers detailed overviews, customizable dive logs, and advanced planning for various dive types. Connect your dive computer to manage data and firmware.

Highlights
  • Comprehensive dive logging
  • Detailed dive planning
  • Support for OC and CCR dives
  • Unlimited tank support
  • Decompression model selection
  • Dive computer connectivity
  • Cloud backup and firmware updates
Read full description

Dive into the deep with Reef, the ultimate tool for every diver regardless of experience, level, or dive style. Designed to enhance and prolong your passion for diving, Reef seamlessly extends your diving experience, both before and after the actual dive. With Reef in your pocket, you're always ready to explore. Dive Log > Get a comprehensive and detailed overview of all your dives. > Easily sort and filter to find specific dives. > Import and export dives effortlessly. > Personalize dives with custom details, photos, location and more. > Engage with your dives using the interactive chart functionality. > Visualize intricate data like tank pressures, pO2, loop temperature, etc.* > Choose the data points you want to see > Zoom in on portions of the dive you are interested in Planner > Keep track of all your upcoming dives with a comprehensive overview. > Sort, filter, and organize your dive plans. > Plan for a single dive or a series of dives. > Suitable for OC (Open Circuit) and CCR (Closed Circuit Rebreather) dives. > Supports an unlimited number of tanks. > Choose between DCAP and Buhlmann decompression models. > Bailout scenario > Configure gas content Device Manager > Connect your Poseidon M28 dive computer through WiFi > View details about connected submodules. > Download, store, and back up your dives in the cloud. > Access vital service information > Monitor total dive time > Stay updated with firmware information. *Only available with Poseidon M28 dive computer

Screenshots

Diveplanner Tec & Rec4 screens
Poseidon Reef4 screens

Verdict

The call

Diveplanner Tec & Rec and Poseidon Reef both sit at 3.1 stars, but that hides the real split: 43% of Diveplanner Tec & Rec's written reviews are positive against 0% of Poseidon Reef's. Diveplanner Tec & Rec also leads on ads (none vs shown) and ratings volume (7 vs 2). Poseidon Reef's advantage is in-app purchases (none vs 3) and iOS requirement (12.1 vs 17.0). On price, rating, update cadence and device support 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. Diveplanner Tec & Rec sells 3 one-off in-app purchases. Poseidon Reef asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 3.1 for Diveplanner Tec & Rec against 3.0 for Poseidon Reef. Both are backed by a comparable volume of ratings — 7 and 2 respectively. Written reviews are what separate them: 43% of Diveplanner Tec & Rec's written reviews are positive against 0% of Poseidon Reef's.

UpkeepUpdate frequency

Diveplanner Tec & Rec ships an update every 2 months, Poseidon Reef every 5 weeks. Both last shipped on November 3, 2026.

Scorecard6 real differences · 4 level
Diveplanner Tec & Rec versus Poseidon Reef: the parameters behind the verdict, then further details
ParameterDiveplanner Tec & RecPoseidon Reef
PriceFreeFree
Rating3.1 (7 ratings) — better3.0 (2 ratings)
Positive reviews42.9% of reviews — better0.0% of reviews
Number of ratings7 — better2
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesYesNo — better
MonetizationFreemiumAd-supported — better
DevicesiPhone, iPad, MaciPhone, iPad, iPod, Mac — better
Requires iOS17.012.1 — better
Further details — not scored
Size96 MB58 MB
Age rating4+4+
DeveloperSensetrails LLCPoseidon Diving Systems AB

Customer experience

Diveplanner Tec & Rec

All ratings7 ratings
Positive42.9%
Neutral28.6%
Negative28.6%
Written reviews7 reviews
Positive42.9%
Neutral0.0%
Negative57.1%

Poseidon Reef

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

3 purchases

Diveplanner Tec & Rec

One-time3
  • Two weeks free trialFree
  • Tec Basic$7.99
  • Tec Advanced$19.99
None

Poseidon Reef

No in-app purchases

Questions

Is Diveplanner Tec & Rec free?
Diveplanner Tec & Rec is free to download, with in-app purchases available.
Is Poseidon Reef free?
Poseidon Reef is free to download, with no in-app purchases.
Which has better reviews, Diveplanner Tec & Rec or Poseidon Reef?
Diveplanner Tec & Rec is rated higher. Diveplanner Tec & Rec averages 3.1 out of 5 from 7 ratings, while Poseidon Reef averages 3.0 from 2 ratings.
Do Diveplanner Tec & Rec or Poseidon Reef have ads?
Poseidon Reef shows ads; Diveplanner Tec & Rec does not.
Which is updated more often, Diveplanner Tec & Rec or Poseidon Reef?
Diveplanner Tec & Rec ships an update every 2 months, and Poseidon Reef every 5 weeks. Most recently, Diveplanner Tec & Rec was updated on November 3, 2026 and Poseidon Reef on November 3, 2026.

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