Health Data Server vs EatSync
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Health Data Server
Stream real-time health data from your Apple Watch to your overlay. Display heart rate, calories, and more with customizable animations and sounds. Save workout data to Apple Health.
- Stream heart rate from Apple Watch
- Display calories burned
- Customizable overlay appearance
- Heartbeat animation and sound
- Save workout data to Apple Health
- Access extensive HealthKit data
Read full descriptionHide full description
The watch app requires watchOS 8+ This app was built to get heart rate, calories, and more from your watch into a stream overlay. It does this by sending the data to HDS Cloud (or an IP address/port you specify). A website hosted at hds.dev can be used as a browser source in OBS to show the data. This app can save workout data to Apple Health Features: - Show your heart rate on stream with just an Apple Watch. No extra heart rate monitors required. - The app will only affect your Activity Rings if calories are enabled - Heart rate color ranges. Know where your heart rate is at a glance. - The overlay app comes with a plethora of customization options. Make your overlay look however you want. - The overlay comes with a heart beat animation that matches your real heart rate - The overlay can also play sounds to go along with the heart beat animation - Even more data for advanced users: - Motion - Every single HKQuantityTypeIdentifier available in HealthKit (so pretty much anything) Go to https://github.com/Rexios80/hds_overlay for information on how to set up the overlay.
EatSync
Read full descriptionHide full description
Track what you eat in seconds. EatSync uses AI to identify your food from a photo, understands Indian meals by name, and keeps your calorie and nutrition data private on your device — no account, no cloud, no subscription required to get started. SCAN YOUR FOOD WITH AI Point your camera at any meal and EatSync identifies it instantly — calories, protein, carbs, and fat included. Works on home-cooked Indian food, restaurant plates, packaged snacks, and everything in between. Can't take a photo? Just type "2 rotis with dal fry" and the AI figures out the rest. BUILT FOR INDIAN FOOD EatSync knows dal makhani, poha, idli, biryani, samosa, homemade sabzis, and hundreds more Indian staples out of the box — no searching required. Most calorie apps treat Indian food as an afterthought. We didn't. CONNECTS WITH APPLE HEALTH EatSync reads your daily step count from Apple Health to estimate calories burned and adjust your daily targets. Your Health data is read-only — EatSync never writes back to Apple Health. You can disable the connection any time in Settings → Privacy & Security → Health. TRACK EVERYTHING THAT MATTERS • Daily calories and macros (protein, carbs, fat, fibre) • Breakfast, lunch, dinner, and snacks — all in one view • Water intake • Exercise and calories burned • Steps via Apple Health • Weight over time LOG FOOD YOUR WAY • AI camera scan — point and log • Describe your meal in plain language • Search 500,000+ foods including Indian, global, and branded items • Barcode scanner for packaged foods • Save your regular meals and log them in one tap YOUR DATA STAYS ON YOUR PHONE No account to create. No login. EatSync stores everything locally on your device using Apple's SwiftData. Delete the app and your data is gone — we never see it. KNOW YOUR NUMBERS Your daily calorie target is calculated from your personal stats — age, height, weight, and goal — using the clinically validated Mifflin-St Jeor equation. Whether you want to lose weight, maintain, or build muscle, EatSync sets a target that actually makes sense for your body and adjusts as you log. Tap "Sources" in the Progress tab to see every medical reference behind our calculations. EATSYNC PRO — UNLOCK EVERYTHING Free users get 3 AI scans per week and 3 saved meals. Upgrade to EatSync Pro for unlimited AI scanning, unlimited saved meals, full nutrition history, and a personalised 7-day meal plan generator. Plans starting at ₹199/month · $4.99/month Annual plans save 33%. EatSync Pro subscriptions are available as weekly, monthly, and annual auto-renewing subscriptions. Payment will be charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. You can manage and cancel any time in your App Store account settings. Your health data is yours. EatSync never sells, shares, or uploads your personal information. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://ishan-ahuja.github.io/EatSync-Privacy/
Screenshots
Verdict
The clearest difference is price: EatSync at Free against Health Data Server's $4.99. Health Data Server's advantage is device support (4 vs 1) and iOS requirement (14.0 vs 17.6). On update cadence, 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
EatSync is free to download; Health Data Server costs $4.99 up front. Health Data Server sells 6 in-app purchases, starting at $2.99 per month and EatSync sells 3 in-app purchases, starting at $1.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Health Data Server ships an update weekly, EatSync every 5 days. The most recent releases landed on October 15, 2026 and October 1, 2026 respectively.
| Parameter | Health Data Server | EatSync |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.9 (41 ratings) — better | — |
| Positive reviews | 81.8% of reviews | — |
| Number of ratings | 41 — better | — |
| Update frequency | Weekly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod, Mac, Apple Watch — better | iPhone |
| Requires iOS | 14.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 27 MB | 14 MB |
| Age rating | 4+ | 12+ |
| Developer | Aaron DeLory | Ishan Ahuja |
In-app purchases
Health Data Server
- HDS Cloud Monthly7 Days trial$2.991 Month
- HDS Cloud Yearly$29.991 Year
- Small Tip$0.99
- Medium Tip$2.99
- Large Tip$4.99
Show 1 moreShow fewer
- Make Up the Difference$49.99
EatSync
- EatSync Pro$1.997 Days
- EatSync Pro$4.991 Month
- EatSync Pro$34.991 Year









