Almost nobody quits ear training because an exercise beat them. People quit because Tuesday ran out of time, Wednesday did too, and by Thursday coming back is an effort. A daily challenge exists to solve that problem and no other: it's deliberately short, it changes on its own, and it's waiting there without you having to decide what to practise today.
It's 4 chained exercises that climb in difficulty. The interesting part is how they're picked: not at random per player, but from a seed derived from the date. Everyone who plays today gets the same challenge you do, and that's what makes comparing scores mean anything.
The order isn't decoration either. It opens with easy listening as a warm-up — hearing needs a minute to settle, like any other sense, and starting with the hard thing only produces early frustration. Then it climbs, and the last stretch is the real technical challenge. Difficulty also adapts to your level: a beginner's challenge and an advanced player's don't weigh the same.
If you want the ordered path rather than one loose challenge a day, it's in the ear training guide.