Apps Tagged ‘Reference’

Knots 3D

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Tie, untie and rotate more than 100 knots with just your finger! Knots 3D will give you a whole new perspective on knots! Grab a rope and have fun!

– #1 Reference App in 75 Countries*
– Included in Scouting Magazine’s “Ultimate List of Scouting Apps” and featured twice in the Trek Tech section (Sep/Oct ’12 and ’14 issues)

Have you ever wondered what a knot looks like rotated 40° or maybe 90°? Or maybe you want to see what a Trilene knot or Constrictor knot looks like from the back? Use your finger to spin the knot and see how it looks from any angle in 3D!

Choose from 101 different knots and see how they’re tied in incredible detail. Watch the knot draw itself or use your finger to tie and untie the knot. Its easy to see where the virtual rope goes in and out and around. (Something about a rabbit and a hole and a tree right? ) Zoom in on the knot to get a closer look or flip it around for another perspective. Can your old school knot app do that?!

Product Features and Functions
– Compatible with iPhone, iPad, and iPod Touch (Universal App)
– High res graphics for retina displays
– Learn to tie 101 unique knots
– Watch knots tie themselves and pause or adjust the speed of the animation at any time
– Rotate knots in 360 degree, 3D views to study them from any angle
– Zoom in on a knot to see it in greater detail
– Interact with the knot on screen via multi-touch gestures such as pinch-to-zoom and swipe to tie/untie.
– Browse knots by category or search by name
– Completely self contained — No internet required!
– 100% localized for over a dozen languages: English, Chinese, Danish, Dutch, French, German, Hebrew, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Spanish, Swedish and Turkish!

Each 3D knot has detailed reference information including tying pointers, strength and reliability, structural info, and Ashley reference numbers (ABoK) and occasionally the history behind the knot.

The knots are arranged by both Category (Boating, Climbing, Fishing, Scouting, etc) and Type (Bend, Loop, Stopper, etc). If you find a knot you like or want to come back to later, add it to your Favorites list for quick reference.

Albright Special, Anchor Hitch, Ashley’s Bend, Blood Knot, Bowline, Bowline on a Bight, Buntline Hitch, Carrick Bend, Cats Paw, Clinch Knot (Improved), Clove Hitch, Constrictor Knot, Larks Head Hitch, Double Sheet Bend, Figure 8 Knot, Figure 8 Bend, Figure 8 Loop, Fisherman’s Eye, Fisherman’s Knot, Jar Sling Knot, Loop Knot, Overhand Knot, Perfection Loop, Rolling Hitch, Round Turn & Two Half Hitches, Running Bowline, Square Knot (Reef Knot), Sheepshank, Sheet Bend, Stevedore’s Knot, Surgeon’s Knot, Surgeon’s Loop, Taut Line Hitch, Tiller’s Hitch, Timber Hitch, Water Knot, Zeppelin Bend, Alpine Butterfly, Trucker’s Hitch, Prusik Hitch, Rapala Knot, San Diego Jam, Yucatan Knot, Diagonal Lashing, Double Coin Knot, Mooring Hitch, Round Lashing, Shear Lashing, Square Lashing, Trefoil Knot, Jury Mast Knot, Monkey’s Fist, Turk’s Head and many more!

Complete Knot List at:

Superb in every way – 5 Stars!
I’m a fairly handy guy (surgeon) and rely on several knots in my practice. Nevertheless I’m pretty hopeless at learning new knots and remembering them, even though I’m a sailor and do some fishing. Knots 3D is the answer. I love every aspect of the app.

Great App – 5 Stars!
I really like this app, I have 4 knot apps, and I use this one the most. As a firefighter rope skills is a must and this app helps keep me “knot prepared”. The zoom and step through the knot using a finger gestures is real handy. The author updates this app with new knots often. I recommend this app.

* As per on 9/11/2012

Get it here for only Free!

Star Walk™ 2 – Guide to the Night Sky to Watch Stars, Planets, Meteor Showers & Constellations

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Star Walk 2 is a next-generation tool for not only learning the exact position of stars, planets, constellations, comets, ISS, satellites, star clusters, nebulae and meteor showers in the night sky but also for investigating its’ depth like watching constellations, nebulae and satellites from aside.

BEST OF 2014: The next generation of the best-selling Star Walk, winner of Apple Design Award, used by over 10 million people.

Star Walk 2 is an exquisite stargazing tool that combines astronomical data with premium technology to deliver an effortless journey through thousands of stars, comets, and constellations. All you have to do is point your iPhone or iPad at the sky.

“She’s a beauty.”
The Next Web

“Star Walk 2 is a terrific introduction to astronomy for young and old. It’s also handy for serious stargazers for observing planning.”

“For those who enjoy the original app, Star Walk 2 is worth the upgrade — the interface is gorgeous. Anyone with even a passing interest in astronomy should grab Star Walk 2.”

“It is worth every penny.”


All-new stunning design:
– New simpler and cleaner interface in vibrant colors for retina displays
– Atmospheric visual and sound effects, stirring soundtrack
– Exclusive handcrafted artwork for constellations, inspired by minimalist low-poly art

Incredible 3D models of celestial bodies*:
– Planetary nebulae
– Constellations
– Dwarf planets, comets, and asteroids
– Man-made satellites
– Layer by layer planets and missions

*Available through In-App Purchase. Constellations are available for free for limited time.

*No Internet connection required*

Universal app that works on iPhone, iPad, and iPod touch.

Star Walk 2 is the first astronomy guide to introduce plausible three-dimensional models of planetary nebulae. Star groupings of the 88 officially recognized constellations are also presented in volume. You can see them as separate entities, turn them around and take a look from the other side. Complemented by articles on connected myths and history, this is the most comprehensive collection of information on constellations.*

As you hold your phone up and point it towards the sky, Star Walk 2 follows your motions using the built-in gyroscope to match the map on your screen to the stars seen from your location. Easily find any star, constellation, or satellite in the sky by tapping Search. Star Walk will indicate the direction to look in.

Unlike on a plain photograph, every star in Star Walk 2 has coordinates. That means you can look at objects, for instance, a constellation from any vantage point in space, not to mention the ultimate accuracy of your map for your exact location.

Star Walk 2 gives you accurate daily data on current moon phase, time of sunset and sunrise, and elevation of planets. With just one slide you can see how the sky will look later tonight or throughout the year.

Special night-time soft red mode will help you preserve night vision when stargazing with a telescope. You can see the sky in X-Ray (and 5 more filters) to study the invisible structure of the universe. Live tracking for over 8,000 satellites will help you catch iridium flares, and detailed articles will satisfy the most curious inquirer.

Get it here for only Free!

Night Sky Guide 3D+

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Night Sky Guide 3D+

Night Sky Guide is a magical new app that enables you to identify the stars, planets, galaxies, constellations and even satellites you can see above.

Just stand anywhere and hold your iPhone, iPod touch or iPad up to the sky and Night Sky Guide will display the names of the stars, planets and other objects you are able to see, just like magic!

Even if your view is obscured by clouds or daylight, the Night Sky Guide app will know which stars, planets, galaxies, constellations and satellites are hiding from your view!

You have to use this app to realize just how amazing it is!

Night Sky Guidey does this by using your location data provided by the GPS and compass built in to your device. It then cross references your location data with its inbuilt map of the sky and overlays the stars, planets, galaxies, constellations and satellites names on your screen.

It really is magical and will amaze you, and anyone you show it to! 

So next time you’re gazing up in to Night Sky Guide and wonder the name of a star, planet, galaxy, constellation or even a satellite, just get out your iPhone, iPod touch or iPad and let Star Discovery app amaze your gaze!

Night Sky Guide is amazing people worldwide! Look at how the magic is working!






Download it here it is (now) free!

Vlinders van Nederland

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Deze digitale gids Vlinders van Nederland maakt deel uit van een serie mobiele informatiesystemen voor het herkennen van soorten in de natuur. Ze zijn ontwikkeld in het kader van het EU KeyToNature project dat beoogt flora- en fauna-informatie snel en makkelijk toegankelijk te maken.

Deze e-guide bevat een determinatiesleutel, alfabetische soortenlijst, indeling op familie en op kleur van 69 soorten dagvlinders die in Nederland voorkomen. Per soort zijn opgenomen: tekeningen van mannetje en vrouwtje, verspreiding in Nederland (kaart) en Europa (tekst), maanden waarin de soort vliegt, waardplanten en look-a-likes. Deze applicatie is een aangepaste heruitgave van de CD-ROM Dagvlinders van Europa, gepubliceerd door ETI in samenwerking met de Vlinderstichting (ISBN 90-75000-86-3).

De geïllustreerde determinatiesleutel is gebaseerd op Butterflies of Europe door T. Lafranchis (2004). Door uit één of meerdere opties te kiezen kan een soort snel op naam gebracht worden. Behalve Vlinders van Nederland is er een e-flora, een paddenstoelengids  en een serie e-fauna’s (vogels, vissen, zoogdieren, reptielen en amfibieën). Andere titels zijn in voorbereiding (de Libellen van Nederland verschijnt in augustus 2013).


Samenstelling: Tekla Boersma en Huub Veldhuijzen van Zanten, Paul Klinkenberg (openingsscherm)
Programmering: Dennis Seijts, Stefano Martellos en Edwin van Spronsen
Initiatief: ETI BioInformatics
Verspreidingskaarten: De Vlinderstichting / Werkgroep Vlinderfaunistiek, 2008. Vlindernet, versie 2: (08-2010)
Tekeningen: Richard Lewington
Foto openingsscherm: Gerard Oostermeijer

ETI BioInformatics is in 1990 opgericht door de Nederlandse overheid en UNESCO om brede toegang tot informatie op het gebied van de taxonomie en biodiversiteit te faciliteren. Zie

Tijdelijk gratis, download hier!

The World by National Geographic

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Take the world for a spin! The World by National Geographic offers classic map content in a contemporary virtual globe. This multi-dimensional app takes National Geographic’s award-winning cartography to a new level! Grab hold of the interactive globe and spin, rotate, zoom, and select to begin your exploration, then tell friends about your favorite world views through the app’s share features. Navigate entire atlases, hundreds of National Geographic photographs, and archives of country-based data anywhere, anytime with the touch of a finger.

Free for a limited time, get it here!

World Atlas by National Geographic

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Unlike other map applications, the National Geographic World Atlas utilizes our highest resolution, press-ready images, providing you the same rich detail, accuracy, and artistic beauty found in our award-winning wall maps and bound atlases. The app is preloaded with 3 different styles of world maps, down to country-level detail. With an internet connection, you can continue zooming through continent-level maps into detailed Microsoft Bing maps – close enough to see your home!

Browse the world as you once did in your classroom with the new interactive 3D globe. Spin, pan, rotate and switch between three different map styles including our classic (blue-ocean), executive (antique-inspired) and satellite image.

Free for a limited time, get it here!

National Geographic World Atlas

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National Geographic has taken its award-winning World Atlas and updated it completely for 2013 with a new look, improved functionality, and brand new features.

• All state-of-the-art National Geographic maps are in HD, giving you the best viewing experience possible.
• New infographics enhance each country’s Flags and Facts section.
• Better measurement tools give you even more accuracy.

• Store your pins in the cloud and share them across devices. Plan a trip on your iPad, then use your customized map on your iPhone.
• Add and customize collections of map pins
• Get up-to-the-minute weather
• Check the latest currency conversion rates, or use the currency calculator to convert from one currency to another
• See latitude and longitude indications directly, with a tap of your finger.

The National Geographic World Atlas brings you the highest resolution images available, delivering the stunning detail, accuracy, and beauty National Geographic is known for.

See the world in any style you prefer: classic (blue ocean), antique, satellite, or road map style (provided by Bing maps).

Spin, pan, and zoom in on the world with our interactive 3-D globe and seamless world map layers. Place pins to mark spots and save them for later.

Get up-to-date information on every country and capital city in the world, including socio-economic data, demographics, weather, and currency.

Free for a limited time, get it here!

Impressionism HD

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Collection of 900 paintings by 14 the most prominent impressionists and post-impressionists. Here you will find the best works of Alfred Sisley, Van Gogh, Camille Pissarro, Mary Cassatt, Claude Monet, Paul Gauguin, Paul Cezanne, Edgar Degas, Auguste Renoir and others. Variety of techniques and styles boogles the imagination. Every artist has worked in his own manner, upgraded his skills and put something new into his art. Each work allows to sense the state of mind the artist had while painting his picture. Our app will let you feel the magic attraction of the themes from the greatest impressionism masters. Have a good viewing! Free for a limited time, get it here!


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Welcome to the collection of HD Raphael, a full collection of masterpieces from this great artist, with high resolution which allows you to explore the very detail of the works.

Free for a limited time, get it here!

Tuinvogels van Nederland

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Deze digitale gids Tuinvogels van Nederland maakt deel uit van een serie mobiele informatiesystemen voor het herkennen van soorten in de natuur. Ze zijn ontwikkeld in het kader van het EU KeyToNature project dat beoogt flora- en fauna-informatie snel en makkelijk toegankelijk te maken.

Deze e-guide bevat een snelle zoekfunctie, geluiden, foto’s, een determinatiesleutel en soortsinformatie van bijna 100 soorten vogels die in steden en dorpen worden gezien. Deze applicatie is een voor dit medium aangepaste heruitgave van de CD-ROM Vogels van Europa, gepubliceerd door ETI (ISBN 90-215-3009-0).

Behalve Tuinvogels van Nederland is er een e-flora en een serie e-fauna’s (vogels van Europa, vlinders, reptielen en amfibieën en zoetwatervissen). Andere titels zijn in voorbereiding.

Tijdelijk gratis, download hier!