Comparison

ZDfit vs RDFit

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

Head to head
About

ZDfit

This app pairs with a smartwatch to provide real-time fitness tracking, including steps, distance, and calories. It also monitors sleep quality and displays notifications from your smartphone, all while integrating with Apple Health.

Highlights
  • Real-time sports performance monitoring
  • Step, distance, and calorie tracking
  • Sleep quality monitoring
  • Smartphone notifications (SMS, calls)
  • Multi-sport activity tracking
  • Apple Health integration
Features
Read full description

这款应用程序与我们的智能手表配合使用,可直接从您的手腕获取最佳信息。 我们的智能手表不仅是一款传统的智能手表,更是一款功能强大的运动码表,可实时监测您的运动表现,并允许您接收来自智能手机的短信和通知,同时又不失时尚感。 这款应用程序与 Apple Health App 集成。 内置计步器可追踪您的步数、距离和卡路里消耗。 内置睡眠监测器可追踪您的睡眠质量。 This App together with our smartwatch provides you with the best set of information straight from your wrist. Without compromising your style, our smartwatch is not just a traditional smartwatch but a powerful sport computer to monitor your performance in real time, and also let you receive text message and notifications from your smartphone. This App integrates with the Apple Health App. A built-in pedometer tracks your steps, distance, and calories burned. A built-in sleep monitor tracks your quality of sleep. Powered with multi-sport functionality, our sport smartwatch lets you choose from a series of activity types such as running, biking, walking, hiking, trail run etc… In addition to its training functions, our sport smartwatch will also notify you when receiving incoming calls, text messages or social networks notifications.

About

RDFit

This app syncs with HealthKit to manage your health data. It's developed by a company specializing in smart wearables and electronic products, offering a comprehensive approach to digital health management.

Highlights
  • HealthKit integration
  • Read and write health data
  • Smart wearable device support
  • Electronic product management
  • Digital health tracking
Features
Read full description

RDFit app integrates HealthKit to read and write some data in the Health app. Runde Intelligent Communication is a high-tech company integrating R&D and production of mobile phones and peripheral products, smart wearable devices, and operating e-commerce; R&D and sales of electronic products, digital products, and smart products; electronic software development, electronic products, communication products, and mobile phones , Communication switching equipment, digital integrated system equipment, special electronic equipment, software product design, technology development and technical consulting and sales; computer software, computer network software development; domestic trade, operating import and export business. users to seek a doctor’s advice in addition to using this app and before making any medical decisions.

Screenshots

ZDfit4 screens
RDFit4 screens

Verdict

The call

The clearest difference is ads: ZDfit at none against RDFit's shown. ZDfit also leads on rating (3.1 vs 2.8) and monetization model (free vs ad-supported). On price, ratings volume, update cadence 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

ZDfit holds the better App Store score, 3.1 against 2.8. Both are backed by a comparable volume of ratings — 75 and 197 respectively. Written reviews point the same way: 19% of ZDfit's written reviews are positive against 10% of RDFit's.

UpkeepUpdate frequency

ZDfit ships an update monthly, RDFit every 3 weeks. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard4 real differences · 6 level
ZDfit versus RDFit: the parameters behind the verdict, then further details
ParameterZDfitRDFit
PriceFreeFree
Rating3.1 (75 ratings) — better2.8 (197 ratings)
Positive reviews19.1% of reviews — better10.1% of reviews
Number of ratings75197 — better
Update frequencyMonthlyEvery 3 weeks — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS12.0 — better13.0
Further details — not scored
Size250 MB257 MB
Age rating4+4+
DeveloperShenzhen Zhongdong Technology Co., Ltd.深圳市润德智能通讯科技有限公司

Customer experience

ZDfit

All ratings72 ratings
Positive38.9%
Neutral22.2%
Negative38.9%
Written reviews47 reviews
Positive19.1%
Neutral31.9%
Negative48.9%

RDFit

All ratings190 ratings
Positive38.9%
Neutral7.9%
Negative53.2%
Written reviews692 reviews
Positive10.1%
Neutral9.7%
Negative80.2%

User reviews

ZDfit

From 75 App Store ratings

What we love

  • 👍 Good for basic watch functions
  • 👍 Ability to change watch faces works well
  • 👍 Altimeter, compass, and pressure functions are invaluable for flying/hiking
  • 👍 Easy app setup
  • 👍 Can do it all, plethora of options

Room to improve

  • 🐛 Will not charge
  • 🐛 Lacking features when everything is turned off
  • 🐛 Some functions don’t work (editing dial)
  • 🐛 Trajectory issues, fails to push
  • 🐛 Does not perform as advertised (no voice assistant, weather, calling)

RDFit

From 197 App Store ratings

What we love

  • 👍 Amazing watch
  • 👍 Great app
  • 👍 Useful features

Room to improve

  • 🐛 Connectivity issues
  • 🐛 Unreliable updates
  • 🐛 Inaccurate tracking
  • 🔋 Poor battery life

Bugs and requests

ZDfit

Reported bugs

22 issues
  • Will not charge
  • Trajectory push fails
  • Wallpaper download fails
  • Bluetooth linking fails
  • Watch not updating without app
Show 17 more
  • Watch not turning on after charging
  • Watch faces not working consistently
  • Heart rate monitor stops working when watch is off
  • App is flaky
  • App settings reset
  • No message/email notifications
  • Display reverts to 5 seconds
  • Watch not turning on
  • Display not visible in bright sun
  • Pairing issues
  • Audio Bluetooth not working for calls/rings
  • Sleep tracking inaccurate
  • Oxygen, heart rate, blood pressure monitoring stopped
  • Phone syncing issues
  • Sleep, Heart Rate & O2 levels not syncing to app
  • Some functions won't turn on
  • Watch stopped working after 2 weeks

Requested features

23 requests
  • Add voice assistant
  • Add weather data
  • Enable calling out and answering phone calls
  • Improve dial editing functionality
  • Improve trajectory push functionality
Show 18 more
  • Fix wallpaper download for customization
  • Improve Bluetooth linking
  • Provide operating instructions and manual
  • Enable watch updates without app
  • Improve watch face customization options
  • Enable Strava integration
  • Improve app settings persistence
  • Enable message and email notifications
  • Enable blood pressure monitoring
  • Add pound and feet conversion
  • Enable message deletion from watch
  • Improve phone syncing
  • Improve time setting accuracy
  • Sync sleep, heart rate, and O2 levels to app
  • Improve navigation and usability
  • Enable GPS and accurate compass
  • Add US units for pressure and altitude (inches, pounds, feet, barometers)
  • Improve sleep app functionality

RDFit

Reported bugs

4 issues
  • Watch not connecting to phone
  • App not recognizing watch
  • Time changing unexpectedly
  • Syncing issues after updates

Requested features

3 requests
  • Customizable watch faces
  • Improved fitness tracking
  • Ability to save activity routes

In-app purchases

None

ZDfit

No in-app purchases

None

RDFit

No in-app purchases

Questions

Is ZDfit free?
ZDfit is free to download, with no in-app purchases.
Is RDFit free?
RDFit is free to download, with no in-app purchases.
Which has better reviews, ZDfit or RDFit?
ZDfit is rated higher. ZDfit averages 3.1 out of 5 from 75 ratings, while RDFit averages 2.8 from 197 ratings.
Do ZDfit or RDFit have ads?
RDFit shows ads; ZDfit does not.
Which is updated more often, ZDfit or RDFit?
ZDfit ships an update monthly, and RDFit every 3 weeks. Most recently, ZDfit was updated on November 3, 2026 and RDFit on November 4, 2026.

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