EFN vs Winter Arc
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
EFN
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EFN is a physiology-driven nutrition and training system designed to move beyond traditional calorie tracking. The app analyzes your body composition, metabolism, and physiological data to generate personalized nutrition, training, and supplementation protocols aligned with your real biological profile. Instead of fixed plans or manual coaching, EFN continuously adapts your protocol based on measurable progress. Every 14 days, the system recalculates energy needs, macronutrient distribution, and training strategy to support fat loss, muscle preservation, or body recomposition within safe physiological limits. EFN tracks key indicators such as body fat percentage and lean mass to keep decisions data-driven, not guess-based. Core features: โข Physiology-based nutrition protocols โข Automatic macro calculation and adjustment โข Personalized training generation โข Supplement recommendations with safety safeguards โข Progress analysis based on real body metrics โข Adaptive recalculation every 14 days EFN is not a calorie tracker. It is a structured body recomposition system built on physiological logic and long-term sustainability. IMPORTANT DISCLAIMER EFN is not a medical application and does not provide medical advice, diagnosis, or treatment. Always consult a qualified professional if you have any medical condition. Terms of Use: https://efnempire.com/terms Privacy Policy: https://efnempire.com/privacy-policy
Winter Arc
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YOUR RULES Before day one you write your own rules. Three to seven of them, small enough to do on your worst day. Your rules can change whenever your life does: add one, drop one or reword one on any day, and the days you have already held stay exactly as you held them. WHO YOU ARE BECOMING Four stats, BODY, MIND, GRIND and IRON, drawn from the rules you actually wrote. Watch the shape change across ninety days. The most honest picture of a season you will get, you never chose the numbers, you chose the habits. EVERY DAY YOU SHOWED UP Tap the day number for your calendar: every day you held, every shield that covered you, every day still to come. DAY 90 Add a progress photo whenever you want. They stay on your phone, nowhere else. On the final day they play back as a summit montage, first day to last, beside everything you held and banked. THE MOUNTAIN Your home screen is a climb, not a list. Every day you hold your rules the climber moves up the face, past the treeline, onto the ridge, into the summit push. START ANY DAY Missed October 1? Nothing is lost. Pick your start date when you set up, today or any day ahead, and the app builds the same climb, the same camps and the same summit from there. A winter arc that starts on November 3 is still a winter arc. THE DAILY CHECK-IN The work is yours: the training, the pages, the early nights. Logging it is the quick part. Open the app, tick what you did, close it. Change your mind any time the same day; nothing is final until the day is. STREAK SHIELDS Miss a day and a shield goes instead of your arc. Your gear covers it and the climb continues. No red screen, no broken chain, no starting again from zero. WEEKLY BOSSES Each camp opens a challenge built from your own rules: one of them before 6am, seven days in a row, or done somewhere that is not home. Complete it and you bank a streak shield. Skip it and nothing changes. A challenge is an offer, never an obligation. AURA AND RANKS Every rule you close banks aura, and aura carries you through five ranks: Basecamp, Treeline, Ridgeline, Summit push, Summited. EVERY WEEK CLOSES Seven days make a camp, and each one ends with a recap of what you actually did rather than what you meant to do. Hold every day and the camp is perfect, which banks you a shield. WRITE THE DAY DOWN A line a day, if you want one. A sentence from a book, a note about why it was hard, a photo from the gym. They collect into a private timeline you can scroll back through from day one. A REMINDER THAT KNOWS WHEN TO STOP One nudge at the hour you pick, an optional evening save if the day is still open, and nothing at all once your arc is done. It ends when the season ends. BUILT TO BE LOOKED AT Two themes: Summit, dark and cold and quiet, or Glow, warm and light. Home screen and lock screen widgets so today sits one glance away and one tap from done. PRIVATE No account, no sign up, no feed, no leaderboard. Your arc lives on your phone and in your own iCloud, so it survives a new phone and a reinstall. None of it comes to us. Every screen opens before you decide anything, and Pro starts with a free week for eligible new subscribers, then renews automatically unless cancelled. Terms of Use: https://winterarcchallenge.app/terms Privacy Policy: https://winterarcchallenge.app/privacy
Screenshots
Verdict
The clearest difference is iOS requirement: EFN at 14.0 against Winter Arc's 18.0. On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. EFN sells 2 in-app purchases, starting at $8.99 per month and Winter Arc sells 3 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.
EFN ships an update weekly, Winter Arc every 5 days. The most recent releases landed on October 23, 2026 and October 28, 2026 respectively.
| Parameter | EFN | Winter Arc |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | Every 5 days โ better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone, iPad, iPod โ better | iPhone, iPad |
| Requires iOS | 14.0 โ better | 18.0 |
| Further details โ not scored | ||
| Size | 97 MB | 6 MB |
| Age rating | 17+ | 4+ |
| Developer | Vanessa KRANTZ | Moonshot Media Limited |
In-app purchases
EFN
- EFN Premium Monthly$8.991 Month
- Annual Premium$59.991 Year
Winter Arc
- Winter Arc Monthly7 Days trial$7.991 Month
- Winter Arc Yearly7 Days trial$24.991 Year
- Winter Arc Lifetime$34.99









