Comparison

Reef Guide vs Nudibranch ID West Pacific

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

Head to head
About

Reef Guide

Features
Read full description

You want to know how hot the animals that can be seen while scuba diving or snorkeling? Find the answer through fingertip on images! In Reef Guide you will found the names to more then a thousand fishes, turtles, sea slugs, corals and mutch other species, which living on coral reef. Short amateur movies show all animals in theier natural environment, as they can each watch. Features: - more than a thousand items with names in English, German and Latin - App-language setting English or German - photo index as of contents - select by family name (for example: show all sea turtles, anamonefishes, …) - choose a popular region worldwide - photos and movies in screen size (rotation) - intelligent full-text search, same in popular or Latin name - Darkmode - iPhone Duo uses the inner display like an iPad - no online connection required - no In-App purchases / no subscription - no promotion - universal-app, works for all devices with iOS/iPadOS 27.1 or newer: iPhone, iPhone Duo, iPad and Mac silicon (iPad Version) with macOS 27.1 or newer

About

Nudibranch ID West Pacific

Identify nudibranch species in Western Pacific waters with this comprehensive field guide. Access detailed information and images offline, and track your finds digitally. Regularly updated with new taxonomic data and species.

Highlights
  • Offline access
  • 831 species represented
  • Searchable database
  • Track found species
  • Add personal remarks
  • Regular taxonomic updates
Features
Read full description

This field guide will place right at your fingertips, anytime and anywhere, the most comprehensive collection of Nudibranch species to be found in the Western Pacific waters from the Hawaiian Islands to the Bering Sea to Japan, Korea, China, Hong Kong, Guam and the Marshall Islands. - NO WEB CONNECTION REQUIRED. - There are 835species represented pictorially in this app. - This is an area where marine fauna diversity ranges from tropical to lower temperate species. - No matter where you are, no matter how isolated you may be, you can identify your nudibranch finds. - This identification series is regularly updated when new taxonomic information is available or when new species are added. - Although books have their place, the benefits of this series of apps over reference books are many. - The apps are Searchable - search for species names, authors, dates, sizes, colors, families, orders or photographers, try that with a book! - The apps are convenient and you will have almost all known nudibranchs of the world on your device, try that with a book! - The apps are user friendly and you can tick off species as you find them, yes you can do that with a book, but then you can email your ticked species list, try that with a book. - You can add Remarks to Species and can easily save them digitally, try that with a book! - And apps up to date with the latest taxonomic data, books are soon out of date.

Screenshots

Reef Guide4 screens
Nudibranch ID West Pacific4 screens

Verdict

The call

The clearest difference is price: Reef Guide at $2.99 against Nudibranch ID West Pacific's $4.99. On update cadence, ads, in-app purchases 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

Reef Guide costs $2.99 and Nudibranch ID West Pacific $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Reef Guide ships an update every 6 months, Nudibranch ID West Pacific every 4 months. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

Scorecard1 real difference · 9 level
Reef Guide versus Nudibranch ID West Pacific: the parameters behind the verdict, then further details
ParameterReef GuideNudibranch ID West Pacific
Price$2.99 — better$4.99
Rating—2.5 (2 ratings) — better
Positive reviews—0.0% of reviews
Number of ratings—2 — better
Update frequencyEvery 6 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPad — betteriPhone
Requires iOS27.026.0 — better
Further details — not scored
Size1.8 GB49 MB
Age rating4+4+
DeveloperHarald FeisteGary Cobb

In-app purchases

None

Reef Guide

No in-app purchases

None

Nudibranch ID West Pacific

No in-app purchases

Questions

Is Reef Guide free?
Reef Guide costs $2.99, with no in-app purchases.
Is Nudibranch ID West Pacific free?
Nudibranch ID West Pacific costs $4.99, with no in-app purchases.
Do Reef Guide or Nudibranch ID West Pacific have ads?
Neither Reef Guide nor Nudibranch ID West Pacific shows ads.
Which is updated more often, Reef Guide or Nudibranch ID West Pacific?
Reef Guide ships an update every 6 months, and Nudibranch ID West Pacific every 4 months. Most recently, Reef Guide was updated on October 24, 2026 and Nudibranch ID West Pacific on October 22, 2026.

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