RunDay vs InterFasting
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RunDay
This app offers a comprehensive running experience with 100% voice training, customized plans for all levels, and social features to motivate friends. It also includes stretching, muscle training, and smartwatch integration for a complete fitness journey.
- 100% full-voice training
- Customized running plans
- Sound mixing system for music
- Stretching and muscle training
- Add and motivate friends
- Smartwatch compatibility
- Apple Health integration
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“I want to start running but it is hard to start.. there is no much information.” “Running alone feels more tired, I feel like give up more quickly.” “I cannot run that much longer.. No much stamina make me exhausted fast.” Lack of information, Unsteady plan, Physique management, Going on a Diet All this problem will be gone together with RunDay. [Why RunDay?] ▶ 100% Full-voice training eling like you're running with your own trainer, although you're starting running for the first time, you can finish the 30 minutes running with RunDay trainer. ▶ Various customized running plan RunDay provides 30 mins running for beginners (24 days course), interval training (6 days repeat), Everyday 30 mins running (everyday repeat), Free running (users customizing running), Hiking and challenge running. ▶ Sound mixing system You can concentrate in running with the suitable music for your running intensity. You can also listen to the music that you want through the music streaming application. ▶ Supports Stretching and Muscle training RunDay provides stretching and muscle training menu for the users. For your healthy running life, it is most important to do stretching before and after the running. ▶ Add RunDay Friends Add your RunDay Friends and check the friend record. Push alarm will send when your friends start running. You can motivate your friends with the cheer up message when they are running. Don't be sad that you could not send the motivation message, you can like the friend’s record. ▶ Runday Watch app support! Using the Runday Watch app on Apple Watch, Runday's training program provided on mobile alone without a mobile phone You can proceed, and the exercise records of the Apple Watch can be reflected in the mobile Runday record menu. ▶ Smartwatch compatibility You can share the workout data through the connection of Smartwatch ▶ Workout data of Apple Health app may reflected to RunDay through integration of Health app with RunDay. * Solve your diet with RunDay!* ▶ If you keep turn on GPS at the background, the battery lifespan might be reduced. ▶Access authority 1. Location authority of users : This authority is required to record running data using GPS and using location service at the background. 2. Authority to access Apple music, your music and video activity, and media library : This authority is require to listen to the music in Apple music, your music and video activity, and media library while you're running. 3. Authority access to send you notification : This authority is required to send motivation push message to friends while running. 4. Camera access allowance : Access to share your running info on SNS or use as profile photo by taking photo. 5. Gallery access allowance: Access to share your running info on SNS or use as profile photo by taking gallery. 6. Microphone acces : Microphone permission is required to record voice messages. 7. Voice Recognition Access : Permission is required to find slang for voice messages. 8. Physical activity authority: This is the authority required to measure the number of steps and awareness of movement. 9. Apple Health: Use HealthKit to exercise and exercise pathways. ▶ In order to use the run day service, the following information must be entered when registering as a member. 1. Run day account creation: email address, password 2. Community Use: Nickname 3. Challenge mode and marathon use: nickname date of birth, gender After access permission, you can reset or revoke access as follows After you agree to the access authority, you may withdraw or reset through the below way. Settings > Select RunDay > Select agree or withdraw for access authority facebook : https://www.facebook.com/Everyday-RunFit-110685420520269/ Partnership and Advertising Inquiry: contact@ttam.ai ▶ RunDay Terms and Conditions https://health.runday.co.kr/runday_standardterms_en.html ▶ RunDay Privacy Policy https://health.runday.co.kr/runday_policy_personal_en.html
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.
- 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
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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
Screenshots
Verdict
The clearest difference is review sentiment: InterFasting at 88% against RunDay's 44%. InterFasting also leads on rating (4.8 vs 4.3) and update cadence (every 2 days vs every 5 days). On price, ratings volume, 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
Both are free to download. RunDay sells 26 one-off in-app purchases and InterFasting sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
InterFasting holds the better App Store score, 4.8 against 4.3. Both are backed by a comparable volume of ratings — 193 and 267 respectively. Written reviews point the same way: 44% of RunDay's written reviews are positive against 88% of InterFasting's.
RunDay ships an update every 5 days, InterFasting every 2 days. The most recent releases landed on September 21, 2026 and September 22, 2026 respectively.
| Parameter | RunDay | InterFasting |
|---|---|---|
| Price | Free | Free |
| Rating | 4.3 (193 ratings) | 4.8 (267 ratings) — better |
| Positive reviews | 44.0% of reviews | 88.4% of reviews — better |
| Number of ratings | 193 | 267 — better |
| Update frequency | Every 5 days | Every 2 days — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 378 MB | 85 MB |
| Age rating | 12+ | 4+ |
| Developer | TTAM | Kim Yunhoo |
Customer experience
RunDay
InterFasting
Bugs and requests
RunDay
Reported bugs
4 issues- Inability to join crews for some users
- Workout records not saving properly
- Syncing issues between iPhone and Apple Watch
- Inconsistent performance after updates
Requested features
4 requests- Apple Watch app support
- Customizable voice coach options
- Ability to mute voice coach
- Improved music integration
InterFasting
Not enough reviews yet to summarise bugs or requests.
In-app purchases
RunDay
- sweat190drops$0.99
- Runday Watch App 30-Day Pass$2.99
- sweat490drops$2.99
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- sweat490drops_watchstd$2.99
- Runday Watch App 30+30days$3.99
- sweat600drops_nicerun$3.99
- sweat990drops_watchstd$5.99
- Runday Watch App 90-Day Pass$5.99
- Runday Watch App 90+90days$6.99
- sweat1200drops_10powerrun$6.99
- sweat1200drops_nicerun$6.99
- sweat990drops$6.99
- sweat1200drops_nicerun_event$8.99
- sweat1900drops_SlowJogging$11.99
- sweat1900drops$12.99
- sweat2500drops_5Kin30min$14.99
- sweat2900drops_domore$17.99
- Runday Watch App 365-Day Pass$17.99
- sweat2900drops$17.99
- sweat2900drops_watchstd$17.99
- sweat2900drops_SlowJogging$17.99
- Runday Watch App 1+1years$19.99
- sweat2900drops_gona10k$19.99
- sweat2,990drops$19.99
- sweat3900drops_gona10k$29.99
- Remove AD$54.99
InterFasting
- Premium 1 month$3.991 Month
- Gandan Premium Annual$12.991 Year
- Premium User$12.99









