Musuberu: 3D Rope Knot Tying

"I can follow the diagram until the rope goes behind itself."
That is where rope work usually breaks down.

Musuberu builds the knot in front of you in real 3D. Spin it with a finger to look at the back. Slow it to half speed. Step back one move. Learn at the pace your hands actually work.


■ Find it by what you're doing
"Pitch a tent or tarp", "strap a load in the truck", "bundle it up", "shoelaces". Eleven situations, thirty-four real goals — two taps to the knot that fits, with one line explaining why it's the right one.
Not being able to find the knot when you actually need it is the single most common complaint about knot apps. That is the part we rebuilt from scratch.

■ Colour tells you which end to move
The standing part is indigo. The working end is vermilion. The strand that grows during the animation is the one your hand moves, so you always know which end to pick up.

■ It shows the final cinch
The animation doesn't stop when the end is threaded. It keeps going until the knot pulls tight and settles into its finished shape, so you can compare it against the rope in your hands.

■ At your pace
・0.5x / 1x / 1.5x / 2x playback
・Loop, so you can practise while it repeats
・Reverse, to see how it comes apart
・Jump to any step with one tap
・Front / side / top / angled viewpoints
・Mirror mode, for left-handers or tying it the other way round (left and right in the steps swap too)
・Drag to orbit, pinch to zoom

■ Different names still find it
Munter = Italian hitch. Clove hitch = ink knot. Trucker's hitch = power cinch. Every alias is searchable — and you can save your own name for a knot, which then shows up in the list.

■ Notes you can search
"Truck bed — run it through the hook and double back twice." Write down what you worked out in the field, in your own words. Note text is searched too.

■ Tick off what you've learned
Mark a knot as learned and your progress builds up, so you can pull up just the ones you still want to drill.


■ The 23 knots included
Loops: bowline, figure-8 loop, slip knot
Hitches: clove hitch, two half hitches, round turn & two half hitches, timber hitch, cow hitch, taut-line hitch, rolling hitch, trucker's hitch, constrictor, prusik
Bends: reef knot, sheet bend, double fisherman's, water knot
Stoppers: overhand, figure-8
Everyday: shoelace bow, cross tie for bundles, chain sinnet for cords, sheepshank

We chose depth over count. A list of 200 knots is a list you can't choose from.


■ Works with no signal
Every knot and every 3D animation lives on the device, so it runs on the mountain, on site, underground. No account, no sign-in. Your favourites, notes and names never leave your device. To improve the app, only anonymous usage data (such as which screens are opened) is counted with Google Analytics (you can turn this off in Settings).

■ No ads, nothing more to buy
Every feature is unlocked the moment you buy it.


■ A tutorial that lets you touch it
On first launch you get a short walkthrough — and the very first page hands you a live 3D bowline to spin. You can reopen it any time from Settings.


Note: this app is for learning knots. For anything where safety matters — life support, work at height, climbing — get proper training and verify with real rope and hardware.

Requires iOS 17 or later. iPhone and iPad. Interface in English, Japanese, German, French, Italian, Dutch and Korean.