Comparison

Interval Flow vs Watch Hydration

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

Head to head
About

Interval Flow

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Have you wanted to set the same timers over and over again but find it tedious and cumbersome? We did too so we built Interval Flow! With Interval Flow, you can easily set multiple timers that will ring one after the other, guiding you seamlessly through your activities. Transition effortlessly from one activity to another, whether it's your breathing exercises, stretching sessions, or any other tasks you have in mind. Interval Flow let's you create multiple programs tailored to your specific needs and preferences (watchOS 10+). With just a few taps on your Apple Watch, you can effortlessly switch between programs and enjoy a seamless flow of activities, staying focused and productive. Interval Flow ensures that your Apple Watch becomes a smart partner, helping you stay on track without any distractions. So, the question is, why settle for a standard timer when you can elevate your Apple Watch experience with Interval Flow? It's a game-changer for anyone who values their time and wants to make the most of every minute.

About

Watch Hydration

Features
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Log water intake to HealthKit straight from your wrist! Watch Hydration is a free, simple watchOS app which enables you to quickly enter an amount of liquid and log it straight to HealthKit. Select the cup to choose different liquids, each with their own modifier to ensure you reach your goal. Easily update your goal, and check your progress for the day. Simple, optional, notifications which let you know if you managed to hit your goal or not yesterday.

Verdict

The call

The clearest difference is in-app purchases: Watch Hydration at none against Interval Flow's 1. Interval Flow's advantage is iOS requirement (15.6 vs 17.6). On price, update cadence, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Interval Flow sells 1 one-off in-app purchase. Watch Hydration asks for nothing beyond the download.

UpkeepUpdate frequency

Interval Flow ships an update every 2 weeks, Watch Hydration every 3 weeks. The most recent releases landed on September 8, 2026 and September 19, 2026 respectively.

Scorecard2 real differences ยท 4 level
Interval Flow versus Watch Hydration: the parameters behind the verdict, then further details
ParameterInterval FlowWatch Hydration
PriceFreeFree
Update frequencyEvery 2 weeks โ€” betterEvery 3 weeks
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPod, Apple Watch โ€” betteriPhone, Apple Watch
Requires iOS15.6 โ€” better17.6
Further details โ€” not scored
Size8 MB2 MB
Age rating4+4+
DeveloperTegyaanThomas Chatting

In-app purchases

1 purchases

Interval Flow

One-time1
  • Multiple Programs$3.99
None

Watch Hydration

No in-app purchases

Questions

Is Interval Flow free?
Interval Flow is free to download, with in-app purchases available.
Is Watch Hydration free?
Watch Hydration is free to download, with no in-app purchases.
Do Interval Flow or Watch Hydration have ads?
Neither Interval Flow nor Watch Hydration shows ads.
Which is updated more often, Interval Flow or Watch Hydration?
Interval Flow ships an update every 2 weeks, and Watch Hydration every 3 weeks. Most recently, Interval Flow was updated on September 8, 2026 and Watch Hydration on September 19, 2026.

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