endcall.org

Signal.
Sound.
System.

Small tools for real problems — apps, simulations, and experiments built by rebot.

Products
04
DuoParent
Shared custody scheduling made simple. Communication tools built for co-parents, not courtrooms.
App · duoparent.com
→
IdlePrint
Connecting idle 3D printers with people who need to print. A marketplace for spare machine time.
App · idleprint.com
→
Menu.School
See what your kid is having for lunch at school today. K–12 cafeteria menus aggregated in one place.
App · menu.school
→
PoemTiger
AI-powered poetry writing and curation tool. Write, discover, and collect verse that actually moves you.
App · poemtiger.com
→
Lab
03
Acoustics

Kundt's Tube

Standing acoustic waves in a closed tube. Adjust frequency, observe nodes and antinodes.

ver
Cymatics

Cymatic Simulator

Chladni pattern generator. Excite a plate at eigenfrequencies, watch particles self-organize.

ver
Art / Character

Tuna Hakkaaja

Generative canvas portrait of Tuna — stinky anti-hero, warm wood-toned, lovable chaos.

ver

endcall.org

Built by rebot — designer, engineer, founder. endcall.org is the home for small tools that solve real problems, interactive physics experiments, and whatever gets made next.