Knot Guide HD vs LED Resistor Calculator Plus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Knot Guide HD
Learn to tie over 100 different knots with clear, step-by-step instructions and photographs. This app categorizes knots for easy browsing and provides detailed descriptions for each one, making it a practical tool for various activities.
- 107 unique knots
- Clear, colorful photographs
- Browse by category or knot name
- Detailed knot descriptions
- Categorized knot library
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#1 Knot App on iTunes!!! Now with 107 knots and continuous new additions! An App Store Essentials "Weekend Warriors DIY" PICK! "Wow your friends!" - APPLEIPHONEAPPS.com "...a highly recommended app with tons of utility value..." - IPHONEAPPREVIEWS.net "What's knot to love?" - "THIS OLD HOUSE" - The Hardware Isle "Knot Guide is like a patient teacher... showing you over and over how to tie it until you’ve committed it to memory." - APPCRAVER.com "One of the most practical apps for those not bound by four walls..." - SAN FRANCISCO EXAMINER Need to tie a knot? Knot Guide will teach you the ropes! Knot Guide NOW includes the following 107 knots, 95 of which are unique: Adjustable Bend, Adjustable Loop, Albright Knot, Alpine Butterfly on a Bight, Anchor Bend, Arbor Knot, Ashley Bend, Ashley's Stopper, Bachmann Hitch, Back Splice, Barrel Hitch, Blake's Hitch, Blood Knot, Bowline, Bowline on a Bight, Braid Knot, Buntline Hitch, Carrick Bend, Chain Sinnet (Daisy Chain), Cleat Hitch, Cleat Hitch With Round Turn, Clinch Knot, Clove Hitch, Clove Hitch on a Bight, Constrictor, Countryman's Knot, Cow Hitch, Diagonal Lashing, Double Figure Eight Loop, Double Fisherman's, Double Overhand Stopper, Double Sheet Bend, Double Surgeon's Loop, Eye Splice, Figure Eight Follow Through, Figure Eight Knot, Figure Eight Loop, Fisherman's Bend, Fisherman's Knot, Flemish Flake, Four-in-Hand Knot, Gasket Coil, Girth Hitch, Hammock Hitch, Highwayman's Hitch, Honda Knot, Hunter's Bend, Improved Clinch Knot, Johnson Hitch, Jug Sling, Klemheist Knot, Lariat, Lark's Head, Lumberman's Knot, Monkey Fist, Mooring Hitch, Munter Hitch, Nail Knot, Orvis Knot, Overhand Knot, Oysterman's Stopper, Palomar Knot, Perfection Loop, Pile, Hitch, Poacher's Knot, Pratt Knot, Prusik Knot, Rapala, Reef Knot, Rigger's Bend, Right Angle Knot, Rolling Hitch, Rosendahl Bend, Rosendahl Loop, Round Lashing, Running Bowline, Running Knot, Sailor's Gripping Hitch, Sailor's Whipping, San Diego Jam Knot, Shear Lashing, Sheepshank, Sheet Bend, Simple Simon Under, Sledge Knot, Slim Beauty, Slip, Square, Square Lashing, Stevedore, Surgeon's Knot, Tautline Hitch, Timber Hitch, Trucker's Hitch (1), Trucker's Hitch (2), True Lover's Knot, Tumble Hitch, Turk's Head 3L5B, Turle Knot, Two Half Hitches, Uni Knot, Water Bowline, Water Knot, West Country Whipping, Yosemite Bowline, Zeppelin Bend, Zeppelin Loop 19 CATEGORIES include: Bends, Binding Knots, Climbing Knots, Decorative Knots, Fishing Knots, Hitches (End), Hitches (Middle), Lashings, Loops (Fixed), Loops (Slip), Navy SEAL Knots, Necktie Knots, Rope Care, Sailing Knots, Scout Knots, Shortenings, Splices, Stopper Knots, Whippings FEATURES: * Clear, colorful photographs * Browse search by category or knot name * From the "Knot Categories" screen, select a knot category (description and photo included for each category) * Next, select a specific knot from your chosen category (description and photo included for each specific knot) * Swipe the images to move forward or backward through the visual steps. * Save your favorite knots for easy access * "Knot Lingo" screen covers basic terms for knot tying. Please also check out Knot Guide for the iPhone. People of all walks of life since ancient times have found knots both fascinating and essential. Knots are used in sailing, climbing, tree trimming, jewelry making, and everyday tasks such as hitching a load to your vehicle. Whether you are a novice or you have experience with tying knots, Knot Guide will assist you! NOTE: Knots that are also known as another name are now also listed by the other name (eg. Square Knot is also listed as Reef Knot).
LED Resistor Calculator Plus
Calculate the correct series resistor needed to safely power light-emitting diodes. Input supply voltage, LED voltage drop, current, and the number of LEDs to find the required resistor value and wattage.
- Calculate series resistor value
- Determine resistor power dissipation
- Recommend resistor wattage
- Supports multiple LEDs in series
- Input supply voltage, LED voltage, and current
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LED resistance calculator use to determine the series resistor needed to connect various series combinations of light emitting diodes or "LEDs". LED resistance calculator will assist you pick the resistors make the connections for any number of LEDs. Every (LED) light emitting diode has a current that they can handle safely. Going beyond it maximum current will damage the LED. So limiting the current through the LED with the use of a series resistor is a common practice. LED resistance calculator will help you determine the value of the resistor so you can add in series with the LED to limit the current. Just input the indicated values and the result will be calculate automatically. The result include Resistor Value, Resistor Power Dissipation and Recommended Resistor Wattage. Formula: R = (Vs - Vf * Nled) / If Where: Vs - Supply Voltage Vf - LED voltage drop. The voltage drop on a LED depends on the color it emits. If- LED current. The usual operating range of common 3 mm and 5 mm LEDs is 10-30 milliamps. Nled - Number of LEDs in series A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode that emits light when activated. When a suitable current is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor. LEDs are typically small (less than 1 mm2) and integrated optical components may be used to shape the radiation pattern. Appearing as practical electronic components in 1962, the earliest LEDs emitted low-intensity infrared light. Infrared LEDs are still frequently used as transmitting elements in remote-control circuits, such as those in remote controls for a wide variety of consumer electronics. The first visible-light LEDs were of low intensity and limited to red. Modern LEDs are available across the visible, ultraviolet, and infrared wavelengths, with very high brightness. * This method is not recommended for high current LEDs, which need a more reliable switching current regulator. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.
Screenshots
Verdict
The clearest difference is review sentiment: Knot Guide HD at 77% against LED Resistor Calculator Plus's 0%. Knot Guide HD also leads on update cadence (every 12 months vs every 47 months) and iOS requirement (11.0 vs 13). LED Resistor Calculator Plus's advantage is rating (4.8 vs 4.1) and price ($2.99 vs $4.99). On ratings volume, ads, in-app purchases and monetization model 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
Knot Guide HD costs $4.99 and LED Resistor Calculator Plus $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LED Resistor Calculator Plus holds the better App Store score, 4.8 against 4.1. Both are backed by a comparable volume of ratings — 23 and 8 respectively. Written reviews complicate that: 77% of Knot Guide HD's written reviews are positive against 0% of LED Resistor Calculator Plus's, so the app with the better star average is not the one people write more warmly about.
Knot Guide HD ships an update every 12 months, LED Resistor Calculator Plus every 47 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.
| Parameter | Knot Guide HD | LED Resistor Calculator Plus |
|---|---|---|
| Price | $4.99 | $2.99 — better |
| Rating | 4.1 (23 ratings) | 4.8 (8 ratings) — better |
| Positive reviews | 77.4% of reviews — better | 0.0% of reviews |
| Number of ratings | 23 — better | 8 |
| Update frequency | Every 12 months — better | Every 47 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 13 |
| Further details — not scored | ||
| Size | 99 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Winkpass Creations, Inc. | Nitrio |
Customer experience
Knot Guide HD
LED Resistor Calculator Plus
In-app purchases
Knot Guide HD
No in-app purchases
LED Resistor Calculator Plus
No in-app purchases
Questions
Is Knot Guide HD free?
Is LED Resistor Calculator Plus free?
Which has better reviews, Knot Guide HD or LED Resistor Calculator Plus?
Do Knot Guide HD or LED Resistor Calculator Plus have ads?
Which is updated more often, Knot Guide HD or LED Resistor Calculator Plus?
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