Knowing the principle is not the same as knowing the number.
Over 1,000 tools that do the arithmetic, and paper when the screen is no use.
How it goes.
Pick the tool
Units and conversions, pressure and flow, power and cable, seed and feed, rations and resupply.
Put in what you know
The numbers you can measure. It works out the one you cannot.
Print the answer
A dosage, a wiring diagram, a water-treatment procedure or a map, on paper.
What the thousand are for.
Calculate
- Units and conversions
- Static pressure, head and flow
- Power, load, cable and battery sizing
Plan
- Farming: seed, spacing, yield, feed
- Planting and harvest across the season
- Rations and resupply over weeks
Find your way
- Offline maps with routing
- Mark water, shelter and meeting points
- Print a map or a plan on paper
There is a printer inside it
A dosage, a wiring diagram, a water-treatment procedure — on paper, so the instruction survives the device.
The same box, next side of it
Your own network →
One box, and everyone in the house holding a phone.
Reserve yours for €99
One machine, all six. Fully refundable · No subscription