Comparison

InterFasting vs Diet Lights

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

InterFasting

This app helps users succeed with intermittent fasting through scientific and systematic management. It offers AI-powered schedule and calorie recommendations, a simple timer, and comprehensive tracking of fasting hours, meals, workouts, and water intake. Users can visualize progress and receive detailed reports to build healthy habits.

Highlights
  • AI fasting schedule recommendations
  • AI food calorie calculation
  • Intermittent fasting timer
  • Customizable fasting plans
  • All-in-one health tracking
  • Fasting analysis and reports
  • Home screen widget
Features
Read full description

Want to succeed with intermittent fasting and achieve your weight loss goals? Meet InterFasting—the ultimate AI-powered intermittent fasting tracker and smart diet companion trusted by millions worldwide! Instead of just starving yourself, InterFasting helps you build sustainable, healthy habits through scientific, data-driven, and systematic health management. Start your smart wellness journey with the highest-rated fasting app on the App Store. ■ WHY CHOOSE INTERFASTING? [NEW] INTRODUCING INTERFASTING AI • AI Schedule Recommendations: No more guessing! Our advanced AI automatically analyzes your lifestyle to recommend the perfect, customized intermittent fasting plan. • AI Calorie Counter & Food Scanner: Simply snap a photo of your meal. The AI instantly calculates calories and macros to effortlessly log and manage your diet. THE EASIEST INTERMITTENT FASTING TIMER • Supports all popular fasting methods including 16:8, 5:2, OMAD (One Meal a Day), and custom circadian rhythm schedules. • Receive smart, timely alarms for your fasting start and end times. (※ Please enable notification settings!) 100% CUSTOMIZABLE & AD-FREE FASTING • Adjust your fasting times and schedules completely free. • Track, edit, and manage your personalized fasting plan with a clean, ad-free interface. ALL-IN-ONE HEALTH & WEIGHT TRACKER • Monitor everything in one place: fasting hours, weight loss progress, meal logs, workout activity, and daily water intake. SCIENTIFIC FASTING ANALYSIS & REPORTS • Access detailed body statistics, fasting history, and meal calorie data. • Stay motivated with comprehensive weekly and monthly progress reports. CONVENIENT HOME SCREEN WIDGETS • Check your current fasting stage, countdown timer, and control your status instantly right from your home screen. HOUR-BY-HOUR BODY STAGES INFO • Learn what happens inside your body during a fast (Ketosis, Autophagy, etc.). Understanding these metabolic changes is the key to long-term success. VISUAL PROGRESS & PHOTO DIARY • Log your meals and take "Eye Body" progress photos. Seeing your physical transformation over time is the ultimate motivation to keep going! ■ THE SCIENCE-BACKED BENEFITS OF FASTING • Effective Weight Loss & Fat Burn: Target stubborn body fat and optimize metabolism. • Boosted Autophagy & Cellular Repair: Enhance cellular health and longevity. • Improved Blood Sugar Control: Increase insulin sensitivity and manage glucose levels naturally. • Reduce Inflammation: Lower oxidative stress and support your body’s natural detox. • Enhanced Mental Clarity: Experience razor-sharp brain function and steady energy levels. ■ PERFECT FOR ANYONE WHO WANTS TO: • Try intermittent fasting for the first time and need a beginner-friendly guide. • Stay accountable with a systematic, automated fasting tracker. • Achieve healthy weight loss, keto diet goals, or better metabolic health. • Stop struggling with complex calorie counting and manual meal logging. The secret to a successful lifestyle change is consistency. InterFasting is here to help you build healthy habits that last. Download InterFasting now and unlock your healthy transformation! *** APPLE HEALTH INTEGRATION *** InterFasting seamlessly integrates with the Apple Health app to automatically sync and track your weight, steps, and workout data. --- ABOUT SUBSCRIPTIONS & PAYMENT • Payment will be charged to your Apple ID account at confirmation of purchase. • You can manage or cancel your subscription in your App Store Account Settings at any time. • Subscriptions automatically renew unless canceled at least 24 hours before the end of the current period. - Terms of Service: https://www.interfasting.app/service_en - Privacy Policy: https://www.interfasting.app/privacy_en

About

Diet Lights

Track your weight and diet progress with a simple traffic light system. Log morning and evening weights, monitor fasting times, and record daily moods and meals. Visualize your trends and reach your target weight with helpful reminders.

Highlights
  • Traffic light weight progress system
  • Intermittent fasting timer
  • Daily mood and meal logging
  • Weight trend graphs
  • BMI calculation
  • Customizable reminders
  • Passcode lock
Features
Read full description

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 - Dark Theme The entire app now supports dark mode. Choose System, Light, or Dark in Settings for a more comfortable experience. - Premium Water Widget Log your daily water intake right from Home and see your progress toward your daily goal at a glance. Water tracking is also available in Calendar, making it easier to build healthy habits. - 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. Terms of Service : https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

InterFasting4 screens
Diet Lights4 screens

Verdict

The call

The clearest difference is update cadence: InterFasting at every 2 days against Diet Lights's every 2 weeks. InterFasting also leads on ratings volume (267 vs 2) and rating (4.8 vs 4.5). On price, review sentiment, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. InterFasting sells 3 in-app purchases, starting at $3.99 per month and Diet Lights sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

InterFasting holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: InterFasting has 267 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 88% of InterFasting's written reviews are positive against 90% of Diet Lights's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

InterFasting ships an update every 2 days, Diet Lights every 2 weeks. The most recent releases landed on September 22, 2026 and September 7, 2026 respectively.

Scorecard3 real differences · 7 level
InterFasting versus Diet Lights: the parameters behind the verdict, then further details
ParameterInterFastingDiet Lights
PriceFreeFree
Rating4.8 (267 ratings) — better4.5 (2 ratings)
Positive reviews88.4% of reviews90.0% of reviews — better
Number of ratings267 — better2
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPod, Apple WatchiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size85 MB94 MB
Age rating4+4+
DeveloperKim YunhooHouse201

Customer experience

InterFasting

All ratings267 ratings
Positive95.1%
Neutral1.1%
Negative3.7%
Written reviews69 reviews
Positive88.4%
Neutral2.9%
Negative8.7%

Diet Lights

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive90.0%
Neutral0.0%
Negative10.0%

In-app purchases

3 purchases

InterFasting

Subscriptions2
  • Premium 1 month$3.991 Month
  • Gandan Premium Annual$12.991 Year
One-time1
  • Premium User$12.99
3 purchases

Diet Lights

Subscriptions3
  • 프리미엄$1.997 Days
  • Premium Monthly$2.991 Month
  • Premium$12.991 Year

Questions

Is InterFasting free?
InterFasting is free to download, with in-app purchases available.
Is Diet Lights free?
Diet Lights is free to download, with in-app purchases available.
Which has better reviews, InterFasting or Diet Lights?
InterFasting is rated higher. InterFasting averages 4.8 out of 5 from 267 ratings, while Diet Lights averages 4.5 from 2 ratings.
Do InterFasting or Diet Lights have ads?
Both InterFasting and Diet Lights show ads.
Which is updated more often, InterFasting or Diet Lights?
InterFasting ships an update every 2 days, and Diet Lights every 2 weeks. Most recently, InterFasting was updated on September 22, 2026 and Diet Lights on September 7, 2026.

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