"It's been like 10 minutes" turns out to be two hours. "I just watered the plants" turns out to be five days ago. If this sounds familiar, you are not careless. You have time blindness, and it is not a character flaw.
Time blindness means your internal sense of elapsed time is unreliable. Most people carry a rough built in clock that tells them how long ago something happened, accurate enough to get through a normal day. For people with time blindness, that clock runs quiet or runs wrong. So you are not ignoring time. You genuinely cannot feel it pass the way other people describe.
That gap between what you think happened and what actually happened is where things fall apart. Not because you do not care. Because you are working from bad information.
This is measurable, not made up
Time blindness sounds like an excuse until you look at what researchers have actually found. According to research building on clinical psychologist Russell Barkley's work, people with ADHD consistently underestimate how much time has passed, sometimes by 30 to 40 percent. That is not a small margin of error. That is the difference between "I'll clean it later today" and three days going by without you noticing.
This connects to how the brain physically works. According to the Attention Deficit Disorder Association, time perception is tied to activity in regions like the prefrontal cortex, and lower activity there is linked to weaker time perception. Separately, a review of the research literature found a specific pattern where estimating how much time will pass is often fine, but reproducing or tracking an interval as it happens is what actually breaks down, which is exactly why five more minutes turns into two hours.
So the issue is not motivation. It is a real, studied difference in how the brain processes duration.
Why the usual fixes do not work
Alarms and reminders are built for a different problem. They assume you know when something needs to happen and just need a nudge at that time. But time blindness is not about missing an appointment. It is about not knowing how much time has passed since the last time you did something.
Habit trackers assume a steady rhythm. Miss a day and the streak resets, punishing you for the exact thing time blindness causes: uneven gaps between actions.
Calendars need you to already know when you last did the thing, so you can plan the next one. That is the information you do not have. You are not bad at using these tools. The tools are solving a different problem than the one you actually have.
What DoneAgo does about it
DoneAgo is a last time tracker, available on both Android and iOS. Instead of asking you to remember when you last did something, or trusting a schedule to guess for you, it just shows you the actual elapsed time. Meds, 22 hours ago. Laundry, 4 days ago. No streak to break, no reminder firing at the wrong moment, no guilt attached to the number.
That is the whole purpose of the app: take the job of tracking elapsed time away from your memory, since that memory is exactly the thing time blindness affects, and put it somewhere external and visible instead. You decide what to do with the information. The app's only job is to make sure the information is accurate and easy to see.
What actually changes
You stop asking yourself "wait, did I already do that today?" You stop the mental scramble of trying to reconstruct your last few hours from memory. With DoneAgo you just glance at the widget. Meds: 22 hours ago. Water: yesterday. Stretch: 4 hours ago.
That is enough information to act on. Not because a reminder went off, but because you looked at a real number and made the call yourself.