“When did I last…?” Get an app to answer, not your memory

When did you last get a tetanus shot? Descale the coffee machine? Message that friend? Your brain shrugs. A one-tap log means the answer is a lookup, not a guess.

The short answer: NotedThat records a timestamped entry every time you tap an activity’s toggle. Next time you wonder “when did I last…?”, open the app. The date, time, and how long it’s been are right there.

Why your memory keeps failing this exact question

Psychologists call routine tasks “low-distinctiveness events”: the 40th time you lock the door is indistinguishable from the 39th, so your brain doesn’t bother filing it separately. That’s why you can vividly recall a holiday from 2019 but not whether you took your vitamins two hours ago. The fix isn’t trying harder to remember; it’s not needing to. You need an external record that’s cheaper to write than the thought “I should remember this”.

What a “last time” log gives you that reminders don’t

A reminder app tells you what it thinks you should do next. A last-time log tells you the truth about what you did, which is what you actually need when the doubt hits. “Did I already do this?” is answered by evidence, not another notification. NotedThat is built around exactly this: it’s a done list, the opposite of a to-do list.

How to do it in NotedThat

  1. Open NotedThat (free, no account) and add events for the things you keep second-guessing.
  2. Tap once when you do them. That’s the entire logging flow, designed to be faster than the thought it replaces.
  3. Ask the app, not your brain. Each event shows its last time and total elapsed time; its timeline shows every previous occasion.
  4. Search anything. Full-text search across your whole timeline finds “tetanus” or “descaled” in one keystroke.
  5. Add context when it matters. Attach a note (“left rear tyre, 2mm tread”) or a photo to any entry.

Good things to track alongside

  • Locked the door
  • Took vitamins
  • Watered plants
  • Texted a friend
  • Cleaned fish tank
  • Changed razor blade
  • Charged the power bank
  • Wormed the dog

Never lose the answer again

One tap today saves you the guessing next month. Download NotedThat free on the App Store.

Everything stays on your phone: no cloud, no account, no ads. Your “when did I last” history is yours alone, and exportable to CSV whenever you want it.

Frequently asked questions

Is there an app that tells me when I last did something?

Yes. NotedThat keeps a timestamped history per activity, so every item shows exactly when you last did it and how long it has been.

How is this different from a reminder or to-do app?

To-do apps plan the future; NotedThat records the past. It answers “did I already do this?” with evidence instead of adding more notifications.

Can I look up things I logged months ago?

Yes. scroll any event’s timeline, browse the calendar view by date, or use full-text search to find any entry instantly.

Related guides

Never lose the answer again

One tap today saves you the guessing next month. Download NotedThat free on the App Store.

Download on the App Store