Argus vs Duffy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Argus
Track your steps, calories, sleep, and workouts all in one place. Compete with friends in fitness challenges to stay motivated and achieve your health goals. Log meals easily with photo recognition and barcode scanning.
- Automatic step tracking
- Photo calorie counter
- Sleep tracking with smart alarm
- GPS activity tracking
- Friend step challenges
- Weight loss goal setting
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Move more, eat smarter, and sleep better with Argus. Join over 10 million people using Argus — the all-in-one step tracker, calorie counter, and fitness challenge app that helps you stay active, lose weight, and build healthy habits. STEP TRACKER & PEDOMETER Count every step automatically with Argus' battery‑efficient pedometer. No setup, no extra devices needed. • Accurate step counting all day • Distance, calories burned, and active minutes • Daily and weekly step goals CHALLENGE FRIENDS Compete with friends, family, and coworkers in step challenges and fitness competitions. The challenge feature is what keeps millions of users coming back. • Create or join step challenges • Compete on leaderboards • Team challenges and group competitions • Walking challenges, workout challenges, and more CALORIE COUNTER Log meals in seconds using photo recognition. Snap a photo and Argus estimates calories and nutrition automatically. • Photo food recognition • Barcode scanner for packaged foods • Extensive food database SLEEP TRACKING Track sleep automatically using your phone — no watch needed. Get a sleep score each morning and wake up at the right time with the smart alarm. ACTIVITY TRACKER Track walks, runs, cycling, and hikes with GPS. View routes, pace, and calories burned. WEIGHT LOSS & WELLNESS Set weight goals and watch your progress. Argus combines steps, calories, sleep, and activity data so you can see what's working. WHY ARGUS? • All‑in‑one: steps, calories, sleep, weight, and workouts in one app • Social motivation: challenge friends and stay accountable • Trusted by 10M+ users worldwide • Works with Apple Health Subscription Details: - Choose from monthly ($9.99) or annual subscriptions ($29.99), offering 75% savings. - Payment will be charged to your iTunes Account upon confirmation of purchase. - The subscription renews automatically unless cancelled at least 24-hours before the end of the current period. - The account will be charged for renewal within 24-hours prior to the end of the current period. - Manage your subscription and turn off auto-renewal by accessing your Account Settings after purchase. - No cancellation of the current subscription is allowed during the active subscription period. - Any unused portion of a free trial period will be forfeited when purchasing a subscription. Please note: Continuous use of GPS running in the background can significantly reduce battery life. Privacy Policy and Terms of Use: https://www.azumio.com/page/privacypolicy
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.
- 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
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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).
Screenshots
Verdict
The clearest difference is ads: Duffy at none against Argus's shown. Argus's advantage is update cadence (monthly vs every 5 months) and ratings volume (36K vs 757). On price, review sentiment, in-app purchases and monetization model 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. Argus sells 10 in-app purchases, starting at $4.99 per month and Duffy sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Argus holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Argus has 36K ratings behind it against 757, so its average is the more settled of the two. Written reviews complicate that: 82% of Argus's written reviews are positive against 84% of Duffy's, so the app with the better star average is not the one people write more warmly about.
Argus ships an update monthly, Duffy every 5 months. The most recent releases landed on September 24, 2026 and September 23, 2026 respectively.
| Parameter | Argus | Duffy |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (36K ratings) — better | 4.7 (757 ratings) |
| Positive reviews | 81.7% of reviews | 83.9% of reviews — better |
| Number of ratings | 36K — better | 757 |
| Update frequency | Monthly — better | Every 5 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Requires iOS | 16.0 — better | 18.6 |
| Further details — not scored | ||
| Size | 188 MB | 8 MB |
| Age rating | 12+ | 4+ |
| Developer | Azumio Inc. | Think Tank Productions |
Customer experience
Argus
Duffy
Bugs and requests
Argus
Reported bugs
3 issues- Steps not tracking properly
- Syncing issues with Fitbit and other devices
- Frequent app crashes, especially on newer devices
Requested features
4 requests- Ability to manually enter micronutrients
- Better integration with wearables and other apps
- More customization options for tiles and dashboard
- Improved reporting and historical data tracking
Duffy
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Argus
- Azumio Premium$4.991 Month
- Azumio Premium$8.991 Month
- Azumio Premium$9.991 Month
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- Premium7 Days trial$9.991 Month
- Premium$9.991 Month
- Premium$14.991 Month
- Azumio Premium$29.991 Year
- Azumio Premium1 Year trial$29.991 Year
- Premium1 Month trial$29.991 Year
- Premium$29.991 Year
Duffy
- Tip $1$0.99
- Tip $2$1.99
- Tip $3$2.99
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- Tip $5$4.99









