Start a New Year challenge with your friends

Choose a challenge, a start date, and how many days it lasts. Friends join with your link and check off the days they did it. The board shows everyone's streak.

Ideas

A 31-day reading challenge for my book club
A 10,000-steps challenge for my team in January
A no-takeout month with my roommates

More things to make

Make your own to-do app: Build a to-do list that works the way you do. Describe it in plain words and iqobi makes it. Try TodoXP, a real example.
Make your own habit tracker: Track the habits you care about, the way you want to see them. Describe your habit tracker and iqobi builds it.
Make your own calorie tracker: Log meals and see calories, protein, carbs, and fat in an app you made. Describe it and iqobi builds it. Try Calories.