KaFit vs SZOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Head to head
About
KaFit
Features
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KaFit app是一款为智能手表用户提供24小时的运动监测和健康服务的移动应用，KaFit运动健康app各种丰富的图表让用户对运动和健康数据一目了然，让健康伴您左右，欢迎下载使用。 运动记录-24小时不间断计步，省电智能。单次运动记录，轨迹、步频、配速一目了然。 跑步计划——支持5公里到全马的在线训练计划，循序渐进的科学跑步指导。 智能配件—傻瓜式的智能健康配件数据接入。绑定一次，每次测量完毕的数据会自动回传到手机，在通知栏可以看到。 健康数据——用数据和图表读懂你的健康。目前已经可以支持体重，运动，睡眠等健康指标的采集和显示。 苹果健康应用分享与苹果健康应用程序集成。
About
SZOS
This app syncs with a smart watch to track your daily activity, including steps, heart rate, and sleep patterns. It provides insights into your health and fitness metrics.
Highlights
- Step tracking
- Heart rate monitoring
- Sleep analysis
- Syncs with smart watch
- Activity mode
Features
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"SZOS APP设计为与SZOS智能手表配合使用， 它可以帮助您测量步数，心率，睡眠等" 【温馨提示】 用户开启运动模式后，手机切换至后台仍会持续定位，长时间使用GPS在后台运行可能显著减少电池寿命,影响续航时间。
Screenshots
KaFit4 screens
SZOS4 screens
Verdict
The call
The clearest difference is ads: KaFit at none against SZOS's shown. KaFit also leads on iOS requirement (11.0 vs 13.0). On price, update cadence, in-app purchases and device support 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.
UpkeepUpdate frequency
Both ship on a similar rhythm, roughly every 3 weeks. Both last shipped on November 3, 2026.
Scorecard2 real differences · 8 level
| Parameter | KaFit | SZOS |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.8 (105 ratings) — better |
| Positive reviews | — | 5.3% of reviews |
| Number of ratings | — | 105 — better |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 11.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 55 MB | 70 MB |
| Age rating | 4+ | 4+ |
| Developer | Shenzhen WO TAI ZHI LIAN TECHNOLOGY CO.,Ltd | 晟 谷 |
Bugs and requests
KaFit
Not enough reviews yet to summarise bugs or requests.
SZOS
Reported bugs
112 issues- App needs update and fix
- App has white screen of death
- App hasn't been updated in a year
- App will not open
- App no longer functions or is supported
Show 107 moreShow fewer
- Watch can't work without the app
- App stopped working
- App is not working
- App shows ads pop up
- App doesn't let me login
- App asks to download and only gets adds
- Scammer adds
- Cannot use the watch
- Trojan and virus download risk
- Application does not work
- Something wrong when entering application
- Only a blank page
- Please solve the problem
- It's not working at all
- About a month it's not working
- Is not good at all
- Worst app ever
- No cancel button
- App didn't work
- Fix the bug
- It doesn't work
- Screen is white and shows nothing
- New version of this app isn't working on IOS
- برنامج فاشل لا يعمل تسجيل دخول
- Down loads do not work
- Not determined yet
- Very poorly thought out app
- No long term recording of data
- No blood pressure records
- Needs a lot of work to improve it
- The weather does not work
- When asked to select a city on the app, it only lists counties
- Wondering if this is just a hack system
- Remote camera doesn’t work on the watch
- App allows to take pictures, however one is not able to use the watch as a remote in taking a photo
- Not able to download the music I would like to download onto the watch
- Nice to be able to use the watch as a Bluetooth speaker streaming music from my phone to the watch
- Please background add music on
- Cannot play or control music on this device
- Cannot make and receive phone calls
- Not what I was expecting to get when purchased with the description that was given
- Very limited functionality
- The weather does not work
- Cannot update profile with my own information
- Really a mess to surf this app
- Zero explanation
- No way to really have control on your phone to connect your watch
- WhatsApp, isn’t supported nor display on you watch
- Weather alternative didn’t register your location even add it manually
- Need a 100% better development
- I cant apen this app on my apple phone
- Please help me
- Update for temperature to include Fahrenheit and pounds instead of kg also cm to inches
- Got the watch yesterday after a 10 day wait
- Set it up everything works fine
- Really pleased
- Put the phone on charge this morning left it over an hour it was showing fully charged
- Tried to boot back up, but nothing
- So disappointed the watch looks good the features were great
- None of the buttons are functioning
- It’s showing just one word across the centre of the screen which I think is in Chinese but I’m not sure
- Bad news
- No funciona
- Luego de instalsrlo varias veces la aplicacion se bloquea al principio y no funciona
- No se puede utilizar
- App needs background app refresh option so find phone will work properly and so weather will stay updated, when app is minimzed
- App needs a Celsius/Fahrenheit selector for weather as well as imperial/metric selector for other data
- Also suggest a schedule to set up custom hours for the do not disturb option
- The only problem is the dial market is very hit and miss
- Watch face market never loads
- The two times it did couldn’t download watch faces
- Better without not even worth it
- I got this app to connect the watch
- The design and feel of this watch is great but there are a number of issues with the app
- So I’ll be deleting it as it’s unusable
- There is an issue with the dial store because It’s not launching at all
- There is also an issue with accounts because I’m unable to create and manage my own personal account
- There is also an issue with data security because there is none
- With no way to manage the security of the data stored on the app I will have to uninstall
- I can see someone has tried to raise their fault with the team but nothing seem to have been resolved
- App is crap!!
- I was given a watch that goes with this app, ut the app freezes up on everything
- Can’t load anything from the app
- Worthless!!!!!
- Q R code
- It is saying that the Q R code is invalid
- Dial Market freezes the app!
- I have successfully set up and using my new smart watch which is working well, but when I use the app to customise my dial face the ‘Dial Market’ (spinning wheel of death) section of the app continually searches and ends up freezing the app and the app needs to be reset to work again
- Having to only use the default dials that come inbuilt with the watch and not able to use the Dial Market at all to customise the face which is a shame
- The rating is for the app, not the watch !
- The app is very difficult to use on a IPhone
- Every time I try to open the app it locks up
- When it does work nothing is in Fahrenheit or feet and inches
- Unable to set up the time?
- I have difficulties setting regular time even when the watch is connected to my iPhone???
- Appalling
- Cannot register
- App won’t download face dials
- Watch stuck in transmission mode (I only know this using Google translation of a Chinese message on the screen)
- Totally useless watch and totally useless app now
- No way to troubleshoot or log a complaint
- Avoid!
- App not working
- I have downloaded this app to connect to my watch but I am unable to this as the app is requesting me tk create and account but the button does not work
- Please can you fix this ASAP
- Some functions don’t sync
- I have the AW12 smart watch and can’t get the heart rate data to transfer to the app or the heart rate to track daily which is what it looks like it should do hopefully this will be fixed soon
Requested features
11 requests- Update and fix the app
- App needs background app refresh
- Find phone feature
- Weather stay updated
- Celsius/Fahrenheit selector
Show 6 moreShow fewer
- Imperial/metric selector
- Schedule custom hours for do not disturb
- Background add music on
- Update for temperature
- Include pounds instead of kg
- Include cm to inches
In-app purchases
None
KaFit
No in-app purchases
None
SZOS
No in-app purchases
Questions
Is KaFit free?
KaFit is free to download, with no in-app purchases.
Is SZOS free?
SZOS is free to download, with no in-app purchases.
Do KaFit or SZOS have ads?
SZOS shows ads; KaFit does not.
Which is updated more often, KaFit or SZOS?
KaFit ships an update every 3 weeks, and SZOS every 3 weeks. Most recently, KaFit was updated on November 3, 2026 and SZOS on November 3, 2026.
