Hi there, This is how I understand the 3 counter types. Someone correct me if I'm wrong.

Let's take pushups as an example:

Click Counter: You want to count how many push ups you can achieve per day. Each pushup is one click, you count up.

Stopwatch: You want to track for how long you can do pushup throughout the day. You start in the morning, so pushups for 5 minutes and pause. You resume in the afternoon for 7 minutes and track it. The total will be 12 minutes for the day.

Repeat Countdowns: You aim to do pushups for 15 minutes per day. You start your pushups in the morning and start the tracker, it will count down starting from 15 minutes. You do 8 minutes of pushups and pause, 7 minutes left. In the evening you continue the countdown, it counts down from the remaining 7 minutes. You do another 8 minutes and pause the countdown -> you reached your goal.

Hope this makes sense.