Sum of Days

A personal tracker that gives something back

Sum of Days

Record what matters. See the life you are building.

Bring habits, health, routines, goals, notes, and personal numbers into one private record. Then understand how they change across days, months, and years.

Download on the App Store Explore the views

Formerly JustTrack. Your records and purchases stay with you.

Capture in seconds Numbers, check-ins, notes, goals, custom units, and schedules.
Turn days into perspective Move naturally from today to a month, timeline, or whole year.
Bring health into context See supported Apple Health data beside the things you record.
Keep your history yours No ads, no Sum of Days account, and private iCloud sync.

One record. Four ways to understand time.

Each view answers a different question without making you rebuild your system or split your history between apps.

Day view showing today's health, routine, and personal values.

Day

What matters today? Record it quickly and keep every item within reach.

Month calendar showing colorful daily entries.

Month

When did it happen? Scan a calendar and open any day for full detail.

Timeline view showing several days and all recorded item values.

Timeline

What was life like around then? Read complete days together, without hidden values.

Year view showing a colorful map of tracked days.

Year

What shape did the year take? Step back and find the dates worth revisiting.

Item Lens

Understand one thing deeply.

Move from a recent chart to every recorded year while staying focused on one item. Item Lens keeps daily values, ranges, goals, and long-term patterns in the same place.

Chart or calendar Choose the shape that makes the data easiest to read.
7 days to all time Zoom out without losing the underlying entries.
Daily average or sum Use the measure that makes sense for each item.
Year-scale context Spot consistency, gaps, and phases at a glance.
Weight item displayed as a line chart with date ranges. Item Lens year view showing one metric across the year.

Review

See patterns, not just streaks.

Review looks across what you have recorded and turns it into a concise brief. It can surface meaningful shifts and items that moved together, while leaving the interpretation to you.

Compare useful periods Look back across 7 days, 30 days, or a full year.
Trace every finding Open the dates and values behind a result whenever you need context.
Calculated on your device Your personal Review does not need to become someone else's dataset.
Sum of Days Review showing period comparisons and four on-device findings.
Review connects recent changes to the dates and values that produced them.

One private record across every Apple device.

Made for the Apple ecosystem

Capture a moment on Apple Watch, review a day on iPhone, and make sense of a longer history on iPad or Mac. Private iCloud sync keeps the same record close.

Sum of Days Review and findings displayed in a Mac window.
Mac Wider charts, calendars, timelines, and Review.
Sum of Days on iPad with a daily timeline and a detailed item chart side by side.
iPad Browse and inspect without losing context.
Sum of Days overview on Apple Watch.
Apple Watch Check status and record values while the moment is still happening.

Private by design

Your history should remain yours.

Core records stay on your devices and in your private iCloud container when sync is enabled. Review and Year insights are calculated on-device.

Read the privacy policy
No advertisements No Sum of Days account No feature-use or behavior analytics You approve each Apple Health category

Make your days add up.

Sum of Days is available on the App Store from haha Interactive.

Download on the App Store