Diet Lights is a simple weight tracking app that helps you record your morning and evening weight and see your diet progress at a glance with traffic light colors.

What’s New

Intermittent Fasting Timer
Choose 12h, 16:8, 18:6, 20h, or a custom fasting schedule. Start fasting from the home widget, check progress with a circular timer, and keep your fasting history.

Diary
Log your daily mood, meals, condition, and weight-related factors with emoji tags such as dining out, late-night snacks, period, or constipation.

Precise Weight Entry
Record your weight with up to 2 decimal places for more accurate weight management and body weight tracking.

Better Goal Tracking
Set a target weight, check your progress in 10 stages, and restart your goal from today whenever you want a fresh start.

Morning/Evening Cutoff Time
Customize when the app separates morning weight and evening weight based on your lifestyle.

Why Diet Lights?

For healthy dieting and yo-yo weight prevention, it is helpful to consistently check the difference between your evening weight and the next morning’s weight.

Instead of complicated calorie counting, Diet Lights shows your daily progress with simple traffic light colors.

Main Features

Traffic Light System
Green light: Evening-to-morning weight difference of 1 kg or more
Yellow light: Small weight change
Red light: Weight increase

Weight Trend Graph
View your weight graph by 1 week, 1 month, 3 months, 6 months, or 1 year. Compare morning and evening weight changes and see your target weight line.

Calendar View
Check daily traffic lights, morning weight, evening weight, weight changes, BMI, and more on the calendar. Review your monthly diet pattern at a glance.

BMI and Body Mass Index
Set your height to check BMI. Choose between WHO standard and Asian standard for a more realistic reference.

Target Weight
Set a realistic target weight and track remaining weight, progress rate, and your next stage visually.

Reminders
Get notifications for morning and evening weight measurement times. You can also set fasting end reminders.

Backup and Restore
Premium users can safely store data with iCloud backup and restore weight records, diary entries, and fasting history when changing devices.

Passcode Lock
Protect your personal diet records with a 4-digit passcode lock.

How to Measure Your Weight

Morning: After waking up and using the bathroom
Evening: After dinner and before going to bed
Measure at similar times every day
Track not only weight, but also morning/evening differences, meals, fasting time, and condition
Premium Features

Upgrade to Diet Lights Pro to get:

No ads
Unlimited access to all features
iCloud backup and restore
More convenient personal record management
Recommended For

Anyone looking for a simple diet app
Anyone who wants weight management without calorie counting
Anyone who wants consistent weight tracking
Anyone who wants to prevent yo-yo dieting
Anyone using intermittent fasting or a fasting timer
Anyone who wants to manage BMI and target weight
Anyone building healthy habits with calendar, reminders, and diary features
Anyone who needs visual feedback for diet motivation
Dieting starts with small daily records.
Start building a healthy diet habit with Diet Lights today.

To protect your privacy, all data is safely stored on your device.
Premium users can choose iCloud backup.

If you have any questions, please feel free to contact us.