Comparison

One Step Challenges vs Fast12

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

Head to head
About

One Step Challenges

Features
Read full description

One Step Challenges is a fitness competition app built for friends and family who want to compete fairly across different fitness levels. Like a handicap in golf, each user gets a personal multiplier based on their own fitness — so a beginner and a seasoned athlete can go head-to-head on equal terms. Points are weighted by individual capability, not raw output. Effort wins, not genetics. Your handicap isn't a guess. The moment you connect Apple Health, the app measures it from your last 30 days of real data — daily steps, active minutes, resting heart rate, and time in elevated heart-rate zones. Your first week confirms it, and it recalibrates every 30 days as your fitness changes. Start a 7-day challenge, send your crew the invite link, and everyone competes on their own handicap. When a challenge ends, the first person to hit "Run it back" starts the rematch — and everyone else joins that same one, so your crew stays together week after week. No one to compete with yet? Race a bot. Three opponents, each with a different training style, each with a week you can beat. Pick the one that sounds like you and go — Brian walks, Doug trains most days, Amanda never misses. Or race your Shadow — the you from your own last four weeks. Same routines, same pace, built from your real history. Beat your typical week and you win; win, and your Shadow gets stronger, so the bar rises every time you do. It's the one opponent always exactly your speed. Daily activity is tracked automatically through Apple Health: workouts with heart-rate zone analysis, steps, exercise minutes, and active calories. Log on-plan nutrition with a single tap — no calorie counting. Build daily streaks for consistency. Leaderboards show standings across everyone in a challenge, and you'll know when someone joins, cheers you on, or a challenge wraps up. Key features: - Handicap-fair scoring that levels the field across fitness levels - Handicap measured from your real Apple Health data the moment you connect, recalibrated every 30 days - Heart-rate zone analysis on every workout - Steps, active minutes, active calories, and resting HR tracking - One-tap nutrition logging — no calorie counting - Daily streaks for consistency - Multi-user challenges with shared invite links and codes - Crew rematches that keep everyone in the same challenge - Leaderboard and today feed - Reactions to cheer on the people you're competing with, with notifications when they land - End-of-challenge recaps so every finish gets its moment - Built for honest measurement, not gamification tricks Works with Apple Watch, Garmin, Whoop, Oura, Fitbit, or any device that writes to Apple Health — the more your device shares with Apple Health, the more the app can score. Steps and nutrition work without a wearable. For feedback or support: onestepapp.feedback@gmail.com ——— One Step Pro — optional auto-renewable subscription: - One Step Pro (Monthly) — $4.99 per month - One Step Pro (Annual) — $34.99 per year Each plan includes a 14-day free trial for new subscribers. Payment is charged to your Apple ID at confirmation of purchase. Your subscription automatically renews unless cancelled at least 24 hours before the end of the current period. Manage or cancel anytime in your Apple ID account settings. Any unused portion of a free trial is forfeited when you purchase a subscription. Terms of Use (EULA): https://onestepcollective.com/terms.html Privacy Policy: https://onestepcollective.com/privacy.html

About

Fast12

Build a sustainable fasting routine with a simple timer and personalized coaching. Track your fasting window, hydration, and sleep to understand your body's rhythms. Features AI meal scanning and meal guidance to support your eating window.

Highlights
  • Simple fasting timer
  • Beginner-friendly 12-hour fast
  • Smart fasting insights
  • Personal coaching
  • Hydration tracking
  • AI Meal Photo Scanner
  • Apple Watch support
Features
Read full description

Fast12 helps you build a simple, sustainable fasting routine - starting with the easiest win: a 12-hour overnight fast. Close the kitchen at night, wake up feeling more in control, and build a healthy rhythm without extreme diets, complicated meal rules, or constant calorie maths. Whether you are new to intermittent fasting or want a calmer way to stay consistent, Fast12 gives you the tools to track your fasting window, understand your body, and make better daily choices. WHY FAST12? • Simple fasting timer Start, pause, complete and track your fasting windows with a clear, easy-to-use timer. • Beginner-friendly 12-hour fasting Fast12 is built around a gentle overnight fasting routine, helping you create consistency before chasing longer fasting windows. • Smart fasting insights See how your sleep, hydration, weight, energy and fasting habits connect over time. • Personal coaching Get guidance designed to help you improve your routine, stay consistent, and understand what may be affecting your progress. • Hydration tracking Log water, set daily goals, and spot when thirst may be mistaken for hunger. • Sleep and recovery insights Understand how sleep quality may influence cravings, energy and fasting consistency. • Ai Meal Photo Scanner Snap a quick photo to automatically estimate calories and log your daily meals. • Meal guidance Access fasting-friendly meal ideas and fast-breaking guidance to support your eating window. • Progress and streaks Build momentum with streaks, milestones and progress tracking that help you stay motivated. • Apple Watch support Track your fast from your wrist and keep your routine visible throughout the day. • Widgets, Live Activities and Dynamic Island Follow your fasting progress from your Home Screen, Lock Screen or Dynamic Island. • Privacy-first by design Your health and fasting data stays on your device. No account required. FASTING MADE SIMPLE Fast12 is not about perfection. It is about building one repeatable habit: finish eating, rest, sleep, and start again in the morning. Use Fast12 to: • Track 12:12, 14:10, 16:8 and other fasting schedules • Log meals instantly with AI photo scanning • Reduce late-night snacking • Build a consistent eating rhythm • Monitor hydration, sleep, energy and weight trends • Understand your fasting phases • Stay motivated with streaks and achievements • Get personalised insights based on your routine • Use Apple Watch, widgets and Live Activities for easy tracking BUILT FOR REAL LIFE Many fasting apps focus on advanced fasting windows, strict challenges or complicated routines. Fast12 is designed for people who want a simpler first step. Start with a realistic overnight reset. Build consistency. Then adjust your fasting schedule when you are ready. IMPORTANT HEALTH INFORMATION Fast12 is a wellness and habit-tracking app. It does not provide medical advice, diagnosis or treatment. Intermittent fasting is not suitable for everyone, including some people who are pregnant, breastfeeding, under 18, underweight, have a history of eating disorders, or have certain medical conditions. Speak to a qualified healthcare professional before starting intermittent fasting, changing your diet, or using Fast12 for weight management. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://fast12.d-app.online/privacy.html

Screenshots

One Step Challenges4 screens
Fast124 screens

Verdict

The call

The clearest difference is update cadence: One Step Challenges at every 3 days against Fast12's every 10 days. One Step Challenges also leads on iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice Ā· In-app purchases Ā· Ads Ā· Monetization

Both are free to download. One Step Challenges sells 2 in-app purchases, starting at $4.99 per month and Fast12 sells 2 in-app purchases, starting at $12.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

One Step Challenges ships an update every 3 days, Fast12 every 10 days. The most recent releases landed on October 28, 2026 and October 13, 2026 respectively.

Scorecard2 real differences Ā· 6 level
One Step Challenges versus Fast12: the parameters behind the verdict, then further details
ParameterOne Step ChallengesFast12
PriceFreeFree
Positive reviews—100.0% of reviews
Update frequencyEvery 3 days — betterEvery 10 days
AdsNoNo
In-app purchasesYesYes
Monetization—Freemium
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS15.1 — better26.0
Further details — not scored
Size30 MB29 MB
Age rating12+17+
DeveloperJUSTIN MORGAN MAYEURD App Online Ltd

In-app purchases

2 purchases

One Step Challenges

Subscriptions2
  • One Step Pro Monthly7 Days trial$4.991 Month
  • One Step Pro Annual7 Days trial$34.991 Year
2 purchases

Fast12

Subscriptions2
  • Fast12 Premium Monthly$12.991 Month
  • Fast12 Premium Annual7 Days trial$49.991 Year

Questions

Is One Step Challenges free?
One Step Challenges is free to download, with in-app purchases available.
Is Fast12 free?
Fast12 is free to download, with in-app purchases available.
Do One Step Challenges or Fast12 have ads?
Neither One Step Challenges nor Fast12 shows ads.
Which is updated more often, One Step Challenges or Fast12?
One Step Challenges ships an update every 3 days, and Fast12 every 10 days. Most recently, One Step Challenges was updated on October 28, 2026 and Fast12 on October 13, 2026.

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