What if a day that just slipped by recorded itself?
No diary to keep. Traces like steps, sleep, and workouts gather on their own, Marsy asks a short question at a good moment, and the day stays as a record.
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Your day has been woven into a record
Thursday, March 12
Fell asleep well past midnight. The morning started just as slowly, and it was almost ten before the first coffee.
Took a long walk near the office at lunch. The most I've walked all week. Left one line along the way. “My head feels a little lighter.”
Eight in the evening. Was walking out of the gym when Marsy asked how the day had been. Paused for a moment, then wrote that it was better than expected.
The end of the day. This entry was woven from those traces.
What Marsy does
- 01
Most of it gathers on its own
Traces like steps, sleep, workouts, and plans quietly pile up on your phone. They're organized there first, and only what's truly needed goes to the server.
Today's traces
- 07:12Woke up
- 09:30First event started
- 12:40Took a long walk
- 20:10Workout planned
Turn off any trace you don't want in Settings
TodayTracesDiary - 02
It asks briefly, only at good moments
After a workout, on waking up, as the evening winds down. It doesn't ping you at random times. One line is enough, and skipping is fine.
How are you right now?
DrainedBrimmingWalkCoffeeWorkPeopleLeave a voice noteSkipTodayTracesDiary - 03
Your day becomes a piece of writing
The gathered traces and short answers are woven into a record of that day. Open it months later, and the you of that day is right there.
Diary
Thursday, March 12
Fell asleep well past midnight. The morning started just as…
Wednesday, March 11
It rained, so most of the day was spent indoors. The seat by…
Tuesday, March 10
A long phone call, the first in a while. The familiar voice was…
TodayTracesDiary
What Marsy doesn't do
It doesn't score your day
There's no "7 out of 10 today." A day isn't a number.
It doesn't count missed days
No streaks, no flame badges. When you come back, you just pick up where you left off.
It doesn't cheer you on for the sake of it
No "What an amazing day!" It respects the weight of what you actually wrote.
It doesn't turn your diary into homework
You don't have to write every day. The traces are gathering anyway.
A few things up front
- It never records your surroundings
- Marsy is not listening. The microphone turns on only while you hold the button, and it's always visible on screen while it's on.
- Traces don't leave your phone without good reason
- The day's signals are organized on your phone first. What goes to the server is the minimum needed to weave your diary.
- Voice recordings are erased after 30 days
- Your voice becomes text, and the original deletes itself after 30 days. You can erase it sooner yourself.
- Your records belong to you
- See what's being collected right at the top of Settings, turn off anything you don't want, and download or delete everything at any time.
Who's making this
It's being made by someone who always wanted a diary but never kept one past three days. Records shouldn't belong only to the diligent. Right now I'm quietly refining it alone.
Seungmin Chae
Say helloFrequently asked questions
What is Marsy?
An app that gathers the traces of your day (steps, sleep, workouts, plans) and your short answers, then weaves them into a record of the day with AI. It hasn't launched yet and is getting ready through early access.
How is this different from a diary app?
A diary app needs you to sit down and write. With Marsy, the traces gather on their own and one line is enough for an answer. Even days you write nothing still end up recorded.
What does it collect, and how far does it go?
Signals like steps, sleep, workouts, and plans are organized on your phone first. Only the minimum needed to weave your diary goes to the server, and it never listens to your surroundings. You can see everything it collects in Settings and turn any of it off anytime.
Do I have to answer every day?
No. The traces gather on their own, so even a day you skip still gets recorded. There's no need to treat it like a chore.
When does it launch?
Right now it's just me, quietly refining it in private. Leave your email and you'll be invited in order as soon as it's ready.
How much is it?
Free during early access. If a paid plan ever comes, you'll be told clearly and well in advance.
Start saving your days for the you of a few months from now
Invitations go out in order, as soon as we're ready. Your email is used only for the invitation and launch news. Privacy policy