archeday
Get early access
Offline-first day planner

Plan the day you
actually have.

A to-do list ignores time. Archeday builds your day from reusable 24-hour templates, and when you run late it moves the rest of the day for you.

One email when it launches on Android and iOS, plus early builds if you want them.

No accountNo cloud syncWorks on a plane
9:41◍ ▲ ▮
Today
WED 17 SEP
In Office · 6 of 11 done
07:00
Wake up!
07:30
Breakfast
30m
08:15
Commute
FIXED
45m
09:00
Deep work
09:00 – 11:00 · 120m
FLEXIBLE · MIN 60M
11:00
Standup
FIXED
TODAY
TEMPLATES
SETTINGS
How it works

Three steps, and then it’s just your morning.

01

Build a base day

Lay out the 24 hours you keep: sleep, meals, commute, work. Mark each block fixed or flexible, and give the flexible ones a minimum length.

02

Plan tomorrow in a minute

Pick the template that matches the day, adjust what's different, save. An evening reminder asks you once, at the time you choose.

03

Run the day, late and all

Mark a block done when you finish it. If that's twenty minutes past plan, the rest of the day shifts around your fixed commitments instead of quietly going wrong.

The cascade

What happens when you run late.

One block finishing late doesn’t invalidate the plan. Archeday pushes the rest of the day forward under four rules, and tells you plainly when it can’t fit.

Later only
Blocks move later, never earlier. Anything already planned after the new end time stays put.
Fixed blocks hold
The 10:00 meeting is at 10:00. Flexible blocks in between shrink first, latest one first, down to their minimum.
Finishing early leaves a gap
Nothing jumps forward on its own. Pull the day up when you want to, not automatically.
When it doesn't fit, it says so
If the delay runs into a fixed block, or off the end of the day, you get a named conflict instead of a silent overlap.
Deep work ran 20m over+20M
Planned
Deep work
09:00 – 11:00
Email
11:00 · 30m
Walk
11:30 · 20m
Standup
12:00
→
After cascade
Deep work
09:00 – 11:20
Email
11:20 · 25m
Walk
11:45 · 15m
Standup
12:00
Flexible. Grew by the 20 minutes you actually spent.
Compressible. Email 30m → 25m, Walk 20m → 15m, latest shrinks first, never below its minimum.
Fixed. Standup stays at 12:00, so the compression stops there.
Overflow. If the minimums had run out, you'd see a fixed-overlap conflict here instead of a shuffled plan.
Day templates

Most days are a variation on one day.

Templates inherit from your base day. In Office changes the commute and adds a standup; everything else comes from the parent. Edit the base later and every child day picks it up, except the parts you deliberately changed.

Base Day
ROOT
11 blocks
07:00 wake · 23:00 sleep
In Office
inherits Base Day
+2 own · 3 overrides
Work From Home
inherits Base Day
−1 removed · 2 overrides
Saturday
inherits Base Day
+4 own · 5 overrides

No feed. Nothing to check.

Four tabs: Today, Templates, Plan a day, Settings. Here’s what the working parts look like.

Plan a day

Choose a template, tweak the exceptions, save.

THU 18 SEP
In Office✓
Work From Home
Saturday
Save plan
Block editor

Time, duration, minimum, rigidity, reminder.

TITLE
Deep work
START
09:00
LENGTH
120m
RIGIDITY
Fixed
Flexible
Evening ritual

One local reminder, at your time, then tomorrow is set.

Plan tomorrow
21:30 · on this device
REMINDERS REBUILT FOR A ROLLING 48H WINDOW. EXACT ALARMS WHEN ANDROID ALLOWS THEM.
Privacy

Your day stays on your phone.

Block titles, times, notes and categories are stored on the device and only you can see them. There is no account to create and no schedule sync. Reminders are local alarms, so the app works with the network off.

Account requiredNO
Schedule sent to a serverNO
Works offlineFULLY
Export your dataJSON, ANYTIME

Questions

Is this a calendar?

No. A calendar holds appointments other people gave you. Archeday holds the shape of your whole day, including the parts nobody invited you to.

What happens if I ignore it for a week?

Nothing. There are no streaks and no score. Pick a template when you next want a plan.

Can I move my data to another phone?

Export everything to a JSON file and import it on the other device. Imports run in one transaction, so a failed import leaves what you already had untouched.

Does it work without internet?

Yes, all of it. Planning, editing, reminders and export need no network at all.

What's not in the first version?

No cloud sync, no calendar integration, no AI input, no widgets, no subscriptions, no web client. Android first; iOS comes later.

Tomorrow is mostly decided tonight.

Join the waitlistOne email when it ships. Nothing else.