Comparison

Duffy vs BodyState

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

Head to head
About

Duffy

This app displays your daily step count directly on your Apple Watch face as a complication. It offers a full watch app for detailed stats and goal notifications, plus a companion iPhone app for deeper data analysis and trends. Access your fitness data at a glance without opening the Activity app.

Highlights
  • Watch face complication for step count
  • Full watch app for steps, flights, distance
  • Daily step goal notifications
  • Companion iPhone app for trends
  • HealthKit data integration
Features
Read full description

Duffy provides quick access to your step count directly on your Apple Watch face as a complication. I was surprised to find that a steps complication wasn’t included on Apple Watches out of the box. Being a veteran iOS developer, I decided to build one in my spare time. I really loved my prototype version and thought there were more people who would love it too. So I put in the extra effort to release it to the App Store for everyone! Duffy is completely free, has no ads, and is even open source so if you’re also a developer, you can help me enhance it. Duffy is a simple app, but it will probably turn into the most used app on your Apple Watch. No more opening the Activity app and scrolling around to find your steps. It’s now available at a glance. Duffy is more than just an elegant Apple Watch complication. Use the full watch app for easy access to your steps, flights climbed and distance travelled for today and the past week. Set a daily steps goal and be notified on your watch when you reach it. The companion iPhone app provides the same access to your steps, flights and distance on a much larger, easier-to-read surface while also allowing you to dig deeper into your data to see trends and statistics over time. Duffy reads the steps, flights climbed, distance travelled, and activity energy from your iPhone and Apple Watch from the Health app (via the HealthKit API).

About

BodyState

This app provides a daily energy score based on your fitness metrics, helping you manage stress, plan workouts, and understand your body's condition. It tracks sleep, recovery, stress levels, and training load, offering personalized insights to optimize your well-being.

Highlights
  • Personalized Energy Score
  • Sleep & Recovery Tracking
  • Stress Insights via HRV
  • Acute Training Load (ATL)
  • Personalized Baseline Learning
  • All-in-One Dashboard
  • Apple Health Sync
Features
Read full description

Monitor Your Energy, Every Day with BodyState! BodyState gives you a daily energy score from 1 to 100, combining your most important fitness metrics into a single, clear signal. Whether your goal is to manage stress, plan workouts, or simply feel better, BodyState helps you make smarter choices in tune with your body. Key features: - Personalized Energy Score: Track your body’s condition with a single score, powered by sleep quality, HRV, resting heart rate, and recent physical exertion. No guesswork, just real insights. - Sleep & Recovery Tracking: Discover how restful your sleep truly was and how well your body recovered overnight. - Stress Insights via HRV & Resting Heart Rate: Monitor your stress level over time and stay ahead of burnout. - Acute Training Load (ATL): See the impact of recent physical activity on your body. Know when to push harder and when to pull back. - Know What’s Normal for You: BodyState doesn’t rely on generic health data. Instead, it learns your personal baseline over time to give context-specific insights. Understand how today's numbers compare to your standard. - All-in-One Dashboard: Get your energy, stress, sleep, and training signals all in one intuitive view. - Effortless Syncing: Works seamlessly with Apple Health to gather the metrics you already track, no extra setup needed. How It Works: 1. Sync with Apple Health to pull in key health metrics. 2. Get your daily score and see how each input affects your energy. 3. Check f you’re balanced, depleted, or primed for performance. 4. Track trends over time and adjust your habits. This App is intended for general wellness and information purposes only. BodyState does not provide medical advice, diagnosis, or treatment. Always consult healthcare professionals for medical guidance. Subscribe to access to premium app features; subscription details are the following: - Length: weekly, yearly. - Your payment will be charged to your iTunes Account as soon as you confirm your purchase. - You can manage your subscriptions and turn off auto-renewal from your Account Settings after the purchase. - Your subscription will renew automatically, unless you turn off auto-renew at least 24 hours before the end of the current period. - The cost of renewal will be charged to your account in the 24 hours prior to the end of the current period. - When canceling a subscription, your subscription will stay active until the end of the period. Auto-renewal will be disabled, but the current subscription will not be refunded. - Any unused portion of a free trial period, if offered, will be forfeited when purchasing a subscription. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Duffy4 screens
BodyState4 screens

Verdict

The call

The clearest difference is monetization model: Duffy at free with in-app purchases against BodyState's subscription. Duffy also leads on ads (none vs shown). BodyState's advantage is update cadence (every 6 weeks vs every 5 months). On price, rating, review sentiment and ratings volume 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. Duffy sells 4 one-off in-app purchases and BodyState sells 11 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Duffy against 4.6 for BodyState. Both are backed by a comparable volume of ratings — 784 and 1.7K respectively. Written reviews are what separate them: 84% of Duffy's written reviews are positive against 77% of BodyState's.

UpkeepUpdate frequency

Duffy ships an update every 5 months, BodyState every 6 weeks. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
Duffy versus BodyState: the parameters behind the verdict, then further details
ParameterDuffyBodyState
PriceFreeFree
Rating4.7 (784 ratings) — better4.6 (1.7K ratings)
Positive reviews83.8% of reviews — better77.5% of reviews
Number of ratings7841.7K — better
Update frequencyEvery 5 monthsEvery 6 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterSubscription
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS18.617.0 — better
Further details — not scored
Size8 MB170 MB
Age rating4+17+
DeveloperThink Tank ProductionsFitness & Sports apps SRL

Customer experience

Duffy

All ratings757 ratings
Positive92.3%
Neutral2.6%
Negative5.0%
Written reviews376 reviews
Positive83.8%
Neutral5.1%
Negative11.2%

BodyState

All ratings1,684 ratings
Positive91.8%
Neutral1.8%
Negative6.4%
Written reviews683 reviews
Positive77.5%
Neutral3.8%
Negative18.7%

Bugs and requests

Duffy

Not enough reviews yet to summarise bugs or requests.

BodyState

Reported bugs

2 issues
  • Inability to access app due to Health permissions
  • App not working after updates

Requested features

4 requests
  • Longer data history
  • Automatic Apple Watch complication updates
  • Customization options
  • Ability to manually log feelings/recovery

In-app purchases

4 purchases

Duffy

One-time4
  • Tip $1$0.99
  • Tip $2$1.99
  • Tip $3$2.99
Show 1 more
  • Tip $5$4.99
11 purchases

BodyState

Subscriptions8
  • Weekly premium7 Days trial$2.997 Days
  • Weekly premium$2.997 Days
  • Weekly premium$4.997 Days
Show 5 more
  • Weekly premium7 Days trial$4.997 Days
  • Yearly premium7 Days trial$39.991 Year
  • Yearly premium$39.991 Year
  • Yearly premium7 Days trial$49.991 Year
  • Yearly premium$49.991 Year
One-time3
  • Supporter$4.99
  • Patron$9.99
  • Champion$14.99

Questions

Is Duffy free?
Duffy is free to download, with in-app purchases available.
Is BodyState free?
BodyState is free to download, with in-app purchases available.
Which has better reviews, Duffy or BodyState?
Duffy is rated higher. Duffy averages 4.7 out of 5 from 784 ratings, while BodyState averages 4.6 from 1.7K ratings.
Do Duffy or BodyState have ads?
BodyState shows ads; Duffy does not.
Which is updated more often, Duffy or BodyState?
Duffy ships an update every 5 months, and BodyState every 6 weeks. Most recently, Duffy was updated on October 29, 2026 and BodyState on October 30, 2026.

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