WeightSaved
50.1kg
D-21Goal 48.0kg
−+by 0.1 kg
Quick logging
Type a number or nudge it by 0.1 kg with − and +. It saves automatically a second after you stop.
Once a day. Just your weight.
Just one number,
Just one number,
every day.
No meals, no calories. Enter one number and today's log is done. Day by day, the numbers become your own trend.
Three steps. That's it.
Open the app, enter one number, close it. Nothing to think about, so it's easy to keep going.
Logged in under 3 seconds
1
Open the app
Start right away, no sign-in needed. Today's log is the first thing you see.
2
Enter one number
Type your weight or nudge it by 0.1 kg with − and +. It saves itself after a second.
3
See the trend
Each day's number adds up to a graph. Watch the direction, not the daily ups and downs.
No meals or calories0.1 kg stepsAuto-saves in 1sNo sign-in neededSyncs across devicesHide weightGoal D-dayCSV import & exportDark modeHome screen widgets
Only what you need
No meals, calories, or workouts. Just what you need to build the habit of logging your weight every day.
Latest30D90DAll
Lowest49.8kg
Average50.2kg
Trend graph
See your change over the latest days, 30 days, 90 days or all time, plus the period low and average.
To goalD-21
1.8kg
Start 52.0kgGoal 48.0kg
1.8 kg to go
Goal & D-day
Set a goal weight and date to see how much is left and how many days remain.
WeightSaved
49.8kg
Tap to show weightYou can turn this off in Settings
Hide weight
Hide weight
Not in the mood to see the number? Cover it up, and tap to reveal it again.
A quick tour
of kg.log
Log, Graph, Settings. That's every screen, so there's nowhere to get lost.
Today's weight, how far you are from your goal, and your recent trend on one screen.
Switch ranges to see how you're changing, with the period low, average and your streak.
Pick a goal weight and a date. kg.log works out what's left and your D-day.
In the iOS app, see today's weight and your trend right on your home screen without opening the app.
Small things that matter
You open it every day, so we smoothed out even the little annoyances.
Auto-save
There's no save button. Change the number and it saves itself a second later.
Streak
Counts how many days in a row you've logged. A small nudge to keep it going.
CSV import & export
Bring records over from another app as CSV, and back up to a file anytime.
Pick up on any device
Sign in to keep the same log on your phone and laptop.
Dark mode
Follows your device setting and switches between light and dark automatically.
English · 한국어
Shows up in English or Korean to match your device language.
iOS app
Right on your home screen,
Right on your home screen,
no need to open the app
Keep today's weight, days left to your goal and your recent trend in a widget. Choose a 14, 30 or 90-day graph range.
Privacy
Your records are yours alone
Weight is sensitive information, so we handle only what's necessary.
Sign in with Google or Apple
When you sign in, your records are saved to your account and only you can see them. Sign in with Apple is available in the iOS app.
No sign-in needed
Without signing in, your records are stored only on the device you're using.
Your data is yours
Export it as a file or erase it all at any time. Your weight values are never used for ads or analytics.
FAQ
Frequently
Frequently
asked questions
An app for logging just one thing every day: your weight. No meals, calories or workouts. Just the number, and a graph of how it adds up.
Yes. Without signing in, your records stay on the device you're using. Sign in later and they're saved to your account so you can see them on other devices.
No. It works right in your browser, and if you add it to your home screen it opens like an app. On iPhone, the iOS app on the App Store also gives you home screen widgets.
Yes. Upload a CSV file under Import in Settings, with one entry per line as date,kg. Entries on the same date are replaced with the new value.
Records you save while signed in are visible only to your account, and your weight values are never used for ads or analytics. See the Privacy Policy for details.
Yes. In Settings you can erase all your records or delete your account at any time, and download a CSV backup first.