Comparison

Kairos vs 饮水助手

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

Head to head
About

Kairos

Features
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Kairos is the interval timer that keeps your gym and home workout sessions on track. Plan your workout once, press start, and always know what's next. No guessing, no wasted time. Just start and train. BUILD • Custom work, rest, warm-up and cool-down intervals • Rounds and exercises with weights, reps and notes • Save workouts, give each one a colour, and reuse them anytime TRAIN • Full-screen timer with countdown sounds and vibration • Stays on time with your phone locked or the app in the background • Follow your workout from the Lock Screen and Dynamic Island TRACK • Weekly and monthly stats, with a calendar of every session • Finished workouts saved to Apple Health, if you allow it • No account needed to get started Got an idea or found a bug? Chat with us straight from the app. We read every message. Kairos is free to use. Kairos Premium unlocks unlimited custom workout sessions. Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: https://theworkouttimer.app/privacy-policy

About

饮水助手

Features
Read full description

水对人体至关重要,大家却常常忘记喝水,长期缺少足够的水分会导致健康问题。 喝水时间 让您用最简单的方法跟踪您的水平衡,通过提醒您按时喝水来养成新的健康习惯。 === 特点: - 方便快捷地定制喝水提醒 - 随时随地检查身体的水平衡 - 计算每日的水消耗量 - 简单直观的个人统计数据和图表 === 注意: 喝水时间 与 Apple Health 集成,以读取您的体重,性别和水记录,并写入您的水和咖啡因数据。 我们使用体重和性别来计算您每日推荐的喝水目标。 我们记录您的水和咖啡因摄入量以方便您查看。 您可以根据需要在 Apple Health 中打开或关闭这些权限。 === 注意: 喝水时间 不是一款医疗应用。如果您想将此应用用于医疗目的或者获取特定的水分需求,请咨询您的医生。 关于订阅: - 付款:订阅按周度、月度、年度收费,费用视所选订阅计划而定。确认购买后,订阅款项将从您的 iTunes 账户中扣除。 - 续订:包含免费试用期的订阅将自动续订为付费订阅。除非在当前订阅周期结束前 24 小时关闭自动续订,否则订阅将会自动续期,而费用将会从您的 iTunes 账户中扣除。续订的费用取决于您的订阅计划。 - 取消续订:如需取消续订,请在当前订阅周期到期前 24 小时内,手动在 App Store 订阅管理中关闭续订功能。 使用应用即表示您同意我们的隐私政策和使用条款: -隐私协议: https://docs.qq.com/doc/DZWNzd0N1WG1YZ1pn -服务条款: https://docs.qq.com/doc/DZXdwWWh1akFZTHJr

Screenshots

Kairos4 screens
饮水助手4 screens

Verdict

The call

The clearest difference is price: Kairos at Free against 饮水助手's $0.99. Kairos also leads on update cadence (every 6 days vs every 2 weeks). On ads, in-app purchases, device support and iOS requirement 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

Kairos is free to download; 饮水助手 costs $0.99 up front. Kairos sells 3 in-app purchases, starting at $4.99 per month and 饮水助手 sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Kairos ships an update every 6 days, 饮水助手 every 2 weeks. The most recent releases landed on October 19, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 4 level
Kairos versus 饮水助手: the parameters behind the verdict, then further details
ParameterKairos饮水助手
PriceFree — better$0.99
Update frequencyEvery 6 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
DevicesiPhoneiPhone
Requires iOS16.416.0 — better
Further details — not scored
Size105 MB3 MB
Age rating4+4+
DeveloperHonestyVisionwenxin hu

In-app purchases

3 purchases

Kairos

Subscriptions2
  • Pro subscription monthly1 Month trial$4.991 Month
  • Pro subscription annually1 Month trial$24.991 Year
One-time1
  • Lifetime Pro subscription$19.99
2 purchases

饮水助手

Subscriptions2
  • 月会员$1.991 Month
  • 年会员$9.991 Year

Questions

Is Kairos free?
Kairos is free to download, with in-app purchases available.
Is 饮水助手 free?
饮水助手 costs $0.99, and also offers in-app purchases.
Do Kairos or 饮水助手 have ads?
Neither Kairos nor 饮水助手 shows ads.
Which is updated more often, Kairos or 饮水助手?
Kairos ships an update every 6 days, and 饮水助手 every 2 weeks. Most recently, Kairos was updated on October 19, 2026 and 饮水助手 on October 28, 2026.

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