# Nudis — Comprehensive gastropod ID app > Marine life identification app for sea slugs, with location-based search and user contributions. (iPhone/iPad app by Reef Life Apps LLC.) - Source: https://appshunter.io/ios/app/nudis/id998273975 (this page in markdown: same URL + `.md`) - Developer: [Reef Life Apps LLC](https://appshunter.io/developer/1178161609) - Category: Reference, Education - Price: Free - Rating: 4.30/5 from 4 App Store ratings · 1 written reviews indexed - Age rating: 12+ - Requires: iOS 11.0 · 198 MB - Languages: American English, French (France), German (Germany), Russian, Chinese (Simplified, China), European Spanish - Released: 2015-06-21 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/nudis/id998273975/reviews.md ## What is Nudis? Reef Life Nudis is a comprehensive marine life identification app, cover all species of type sea slugs (and then some). Reef Life Nudis now boasts 300+ species that are fully documented and professionally photographed (350+). This app is perfect for divers, snorkelers and aquarium enthusiast that would like to not only identify, but learn about our salt water friends. Reef Life has GPS coordinates of more than 200 internally defined oceanic regions and sub regions. This update allows user to experience a much simplified process with the identification of species based on a specific location. - You can select from 31 pre-defined menu based regions, examples “Caribbean Sea”, or “Australia, tropical” or “West coast United States” and see the species only from that region. - You can manual drop “pins” on a location in our interactive map and search for species in that exact location. You can save as many searches as you wish in your “myPlaces” folder. - You can even select the “species in my current location” option to see only the species which are located within in your current location. Reef Life now offers users the ability to add their own species to the app. This includes the ability to: - Add all details and images to each species - You can also edit or update details of user created species. 3D Touch users can access all features quickly, as well as utilize our new "zoom view" on the image page. Press a location on the image you will see a zoom of just that spot. Each menu can be toggled to display presented species either in a list view format or as a grid view, depending on individual preferences. This advancement significantly simplifies the process of identifying marine life animals Marine Life Conservation and Education are a priority as well. There are two major sections, 50+ pages covering all matters education and conservation. This app is fully interactive and is based on Apple’s latest programming language, Swift. *** As required by scuba divers *** This app is fully self contained and does not require an internet connection, making this the perfect buddy while on boats or in remote dive locations. ## Key features - Identify over 300 sea slug species - Location-based species search - Add and edit your own species - Offline functionality - Educational and conservation sections - List or grid view options ## Recent user reviews (1 of 1) All indexed reviews: https://appshunter.io/ios/app/nudis/id998273975/reviews.md ### 2/5 — Nudi few *2016-07-16* Not a lot of nudis in this app.. ## Frequently asked questions about Nudis ### What is Nudis? Nudis is a comprehensive marine life identification app focused on sea slugs. It allows users to identify species, learn about them, and even contribute their own findings. ### Does Nudis require an internet connection? No, Nudis is fully self-contained and does not require an internet connection, making it ideal for use in remote dive locations or on boats. ### How does Nudis help with identification? Nudis offers several identification methods, including selecting regions, dropping pins on an interactive map for specific locations, and using your current GPS location. ### Can I add my own species to Nudis? Yes, Nudis allows users to add their own species, including details and images, and also edit existing user-created species. ### What educational content does Nudis offer? Nudis includes over 50 pages dedicated to marine life conservation and education, providing valuable information for users interested in these topics. ### What devices does Nudis support? Nudis is supported on iPhone, iPad, and iPod, and is built using Apple's latest programming language, Swift. ### How often is Nudis updated? The latest version of Nudis is 4.0, which was last updated on January 2, 2018. Future updates will likely continue to expand its database and features. ### What is the user rating for Nudis? Nudis has a rating of 4.3 stars based on 4 ratings, indicating a generally positive reception from its users. ## Version history (last 5 releases) ### 4.0 — 2018-01-02 This app has been updated by Apple to display the Apple Watch app icon. Most comprehensive update to date: New look and feel. Screens have a new look, and the scrolling is much more fluid. Added ability for users to add new species. Added ability for user to upload their own images to any species. Added ability for user to change text size through out app Users can now sort by common name or Species name Added 3D pop and peek functionality Added a change log for user to see all update changes in detail Few bug fixes ### 3.5 — 2017-01-19 In this version, several improvements, and new features: - You can now add your own common names to each species - You can add notes to each species - Added common names to the main view - Better search functions - Plus the typical other minor bug fixes As always, value your feedback and suggestions. ### 3.0 — 2016-08-16 Version 3.0 is a complete and comprehensive redesign, including many great new features. Reef Life Nudis has been updated with the GPS coordinates of more than 200 internally defined oceanic regions and sub regions. This update allows user to experience a much simplified process with the identification of species based on a specific location. - You can select from 31 pre-defined menu based regions, examples “Caribbean Sea”, or “Australia, tropical” or “West coast USA” and will be presented only with the species from that region. - You can manual drop “pins” on a location in our interactive map and search for species in that exact location. You can save as many searches as you wish in your “myPlaces” folder. - You can even select the “species in my current location” option to see only the species which are located within in your current location. This advancement significantly simplifies the process of identifying marine life animals Search functions greatly expanded to now include: Species name, common name, Family, Genus, Sub group type and the descriptive details. ### 1.51 — 2015-11-12 Corrected an issue with some missing images on the iPhone 5s, plus some minor housekeeping ### 1.5 — 2015-10-21 Updated for iOS 9 ## More apps by Reef Life Apps LLC - [Corals, by Reef Life](https://appshunter.io/ios/app/corals-by-reef-life/id827104430) - [Sharks & Rays, by Reef Life](https://appshunter.io/ios/app/sharks-and-rays-by-reef-life/id998269286) - [Fishes, by Reef Life](https://appshunter.io/ios/app/fishes-by-reef-life/id998274856) - [RL Education](https://appshunter.io/ios/app/rl-education/id1061934031) - [Reef Life](https://appshunter.io/ios/app/reef-life/id1095309806) All apps by Reef Life Apps LLC: https://appshunter.io/developer/1178161609 --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*