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New: turn what you learn into flashcards

A calm place to keep track of your days

Acornlog brings time tracking, habits, a journal and flashcards together in one simple app. See where your hours go, watch your habits grow and remember what made each day, and what you learned.

Start your journalSee what's inside

Free · Sign in with Google · Works on phone and desktop

acornlog.com
Deep work · 1:24:07
HomeActivitiesHabitsDiaryLearn
Good morning, Alex
Tuesday, 14 April
Log time
Running12 days41h
Spanish5 days64h
Today's habits
  • Morning run3 of 4 this week
  • Read 30 minutesDaily
  • No phone after 10pmDaily
6 flashcards to reviewSpanish · PostgresReview
Everything in one place

Your time, habits and thoughts, connected

Most apps do one of these. Acornlog connects them, so the time you log also keeps your habits and streaks going.

Track your time

Start a live timer when you begin, or log activities afterwards. Tag them, see daily totals and find out where your hours really go. A running timer syncs across your phone and computer.

Deep work
Side project09:00 – 11:30
Gym
Exercise17:00 – 18:00
Reading
Learning21:30 – 22:00

Build habits

Daily, weekly or monthly habits with a target, one-tap check-offs and undo. Link a habit to a tag and logged activities count automatically.

M
T
W
T
F
S
S

Streaks that keep you going

Star the tags you care about and follow them on your dashboard as a year-long heatmap with your current streak and total hours.

Journal with your own questions

Write the questions you want to answer every day, week, month, quarter or year, like “What am I grateful for?”, and let a pool of rotating questions keep it fresh.

What made today good?

Finally finished the chapter I was stuck on, and the evening walk by the river was beautiful.

Tags and groups

Group tags like Running and Swimming under Exercise, and archive the ones you no longer use.

Made for your phone

Add it to your home screen and log an activity in seconds, wherever you are.

Light and dark

Follows your system setting, or pick the look you like.

Describe your day

Forgot to track? Just describe your day

Tell Acornlog what you did in your own words, typed or dictated. It turns your story into activities with start times, durations and tags. Check them, tweak anything, and save.

Try it

I worked on the app from 9 to half past 11, then had lunch with Anna until 1. In the afternoon I went to the gym for an hour.

Worked on the app
09:00 · 2h 30m
Side project
Lunch with Anna
11:30 · 1h 30m
Friends
Gym
15:00 · 1h
Exercise
New

Remember what you learn

Say what you learned today, whether it's a fact, a word or an idea from a book. Acornlog writes it up as a note, files it under a topic and makes flashcards for it.

  • Dictate it, or write the note yourself and let AI suggest the cards
  • Edit every note and card before it's saved
  • Review a few minutes a day: cards you know come back less often, the hard ones sooner
Try it

Today I learned that in Postgres you can put a WHERE clause on an index, so only the rows you actually query get indexed.

Postgres partial indexes
Postgres

An index with a WHERE clause only covers the matching rows, so it stays small and fast.

Flashcard

In Postgres, what is a partial index?

An index with a WHERE clause, so it only covers the rows you query.

Again
10 min
Hard
2 days
Good
3 days
Easy
6 days
How it works

Up and running in a minute

  1. 1

    Sign in with Google

    No forms, no passwords. Your journal is ready right away.

  2. 2

    Log your day

    Start a timer, describe your day, or say what you learned.

  3. 3

    Watch the patterns

    Streaks, heatmaps and totals show how you're really spending your time, and reviews keep what you learned.

FAQ

Questions, answered

Is Acornlog free?

Yes. Sign in with your Google account and you can use every feature without paying.

Do I need to install an app?

No. Acornlog runs in your browser on your phone, tablet and computer. On your phone you can add it to your home screen and it opens like a regular app.

Does a running timer sync between devices?

Yes. Start a timer on your laptop and you'll see it ticking on your phone, so you can stop it from wherever you are.

How do habits and activities work together?

Link a habit to a tag or a group of tags, for example Exercise. Every day you log a matching activity, like a run or a swim, counts toward the habit automatically.

What happens when I describe my day?

You write or dictate what you did in your own words. Acornlog uses AI to turn it into activities with times and tags, and you check and edit everything before it's saved.

How do the flashcards work?

Say or write what you learned, and Acornlog turns it into a note filed under a topic, with flashcards to go with it. You can also write notes yourself and only let AI suggest the flashcards. When you review, you rate how well you knew each card, and cards you know well come back less and less often, right before you'd forget them.

Who can see my journal?

Only you. Your activities, habits, diary entries and notes are tied to your account and aren't shared with anyone. When you use an AI feature, like describing your day, the text you enter is sent to OpenAI to process it and isn't stored there.

Start keeping track of your days

It takes a minute to set up, and a few seconds a day to keep going.

Start your journal