Built so a printer can be shared, not hoarded

One printer, a lot of requests

As soon as I had a printer on the desk, people started asking for things. A bracket, a toy, a replacement part someone couldn't buy any more. I loved being able to say yes. What I didn't love was the mess around it: a pile of screenshots, half-remembered links, and the same question over and over — "can you print me something?" — with no easy way for anyone to show me what "something" was.

It also felt unfair. A printer is a real expense, and plenty of people who would get enormous use out of one simply can't justify buying it. If I already own the machine, there's no good reason my friends and family shouldn't get to use it too.

Why not just send people to MakerWorld?

MakerWorld is a genuinely great resource. But almost nobody discovers it unless they already own a printer, and once you send someone there it still doesn't solve the actual problem: talking to each other about what gets printed. There's no shared shortlist, no way for someone to say "this one, in green, whenever you have time," and no way for me to answer with a date.

So Spool opens the catalogue up to the people around you. Send them a link, they browse MakerWorld, Printables and MyMiniFactory right inside the app, and they pick what they actually want. You approve it, it lands in your queue, and they can see when it'll be ready.

Money, only if you want it involved

You don't have to foot the bill forever, and you don't have to charge anyone either. Spool lets you decide, print by print: do it for free, ask for a few pounds towards filament, or quote a proper price. It tracks what's owed and what's been paid, and it never takes a payment or a cut — however you settle up is between you and your friend.

And a memory for what I want to print next

The other half of it is selfish. I wanted somewhere to keep the things I'd found and meant to print later, with notes on what worked and what warped. A library, a queue, and a record of every print — in an interface that's quick on a phone while you're standing next to the machine.

I have some software skills, so instead of complaining about it I built the thing I wanted. That's all Spool is: a friendlier front door to 3D printing, for the person with the printer and everyone who wishes they had one.