Kairos vs DrinkFirst
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Kairos
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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 β’ Custom work, rest, warm-up and cool-down intervals β’ Rounds and exercises with weights, reps and notes β’ Save workouts, give each one a colour, and reuse them anytime TRAIN β’ Full-screen timer with countdown sounds and vibration β’ Stays on time with your phone locked or the app in the background β’ Follow your workout from the Lock Screen and Dynamic Island TRACK β’ Weekly and monthly stats, with a calendar of every session β’ Finished workouts saved to Apple Health, if you allow it β’ 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
DrinkFirst
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DrinkFirst turns the apps you already check into a trigger to drink more water. Choose the apps you want to lock. When you try to open them, DrinkFirst puts water first: take a normal drink, let on-device AI verify it, and your apps unlock for the amount of time you choose. DRINK FIRST. SCROLL SECOND. You already remember to check your phone. DrinkFirst uses that existing habit as a cue to hydrate β without adding another reminder to dismiss or another glass to log. HOW IT WORKS β’ Choose the apps you want to protect β’ Take a normal drink of water β’ AI-powered verification checks your drink on-device β’ Your protected apps unlock for your chosen time β’ When that time ends, theyβre protected again SIMPLE BY DESIGN No manual water logging. No hydration reminders to ignore. No complicated tracking. Just drink, unlock and carry on. PRIVATE BY DESIGN Drink verification happens on-device. DrinkFirst does not save or upload your camera video. DrinkFirst is a wellness and habit-building app. It is not a medical device and does not provide medical advice. A DrinkFirst Pro subscription is required to use DrinkFirst. Monthly and annual subscription plans are available. The annual plan includes a 7-day free trial for eligible new subscribers. 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 subscription period. You can manage or cancel your subscription in your App Store account settings. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula
Screenshots
Verdict
Kairos and DrinkFirst are too close to call on the numbers: across 6 compared parameters β price, update cadence, ads and in-app purchases among them β neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Kairos sells 3 in-app purchases, starting at $4.99 per month and DrinkFirst sells 4 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.
Kairos ships an update every 6 days, DrinkFirst every 4 days. The most recent releases landed on October 30, 2026 and November 6, 2026 respectively.
| Parameter | Kairos | DrinkFirst |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 6 days | Every 4 days β better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Devices | iPhone | iPhone |
| Requires iOS | 16.4 | 16.4 |
| Further details β not scored | ||
| Size | 105 MB | 111 MB |
| Age rating | 4+ | 4+ |
| Developer | HonestyVision | Stefano Di Michele |
In-app purchases
Kairos
- Pro subscription monthly1 Month trial$4.991 Month
- Pro subscription annually1 Month trial$24.991 Year
- Lifetime Pro subscription$19.99
DrinkFirst
- DrinkFirst Monthly2 variants$9.991 Month
- DrinkFirst Annual1 Year trial$39.991 Year
- DrinkFirst Annual7 Days trial$39.991 Year
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- DrinkFirst Annual7 Days trial$59.991 Year









