I used a mobile app for recipes, but it was only possible to add recipes from within the mobile app, not on computer.

So I created a small java applet to create recipes on a pc.

When I contacted the creators of the mobile app, they were super enthusiastic. And asked whether they should host it, or if I have a website.

So, with my brother, on the same day, we quickly created a website, hosted the applet, notified them and suddenly received a lot of traffic! Other people, strangers were using software I had written for the first time ever!!!