Hydrate App vs KLU Longevity
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Hydrate App
Effortlessly track your daily water intake and monitor progress towards personalized hydration goals. Log various beverages quickly and visualize your achievements with a clean, colorful ring. Gain insights into your hydration habits over time.
- Log any drink in seconds
- Set personalized daily hydration goals
- Visualize progress with a colorful ring
- View daily, weekly, and long-term trends
- Supports light and dark mode
- Fast and simple user interface
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Hydrate makes it effortless to drink enough water and to see exactly what you're drinking all day. Log any drink in a couple of taps, set a goal that fits you, and watch your progress fill a clean, colorful ring. Completely free. No ads, no subscriptions, no paywalls. Every feature is yours from the start. If Hydrate helps you, you can leave an optional tip to support development, but you never have to. Whether you're a busy professional, a fitness enthusiast, or just trying to build a healthier habit, Hydrate keeps it simple. WHAT YOU CAN DO Log in seconds — water, coffee, tea, juice, sport drinks, and more, with no fussy forms Set your goal — a personalized daily target that adapts to you, whether you sip or guzzle See your day at a glance — a live ring shows how close you are as you go Spot your trends — daily, weekly, and long-term insights reveal your real habits WHY YOU'LL LIKE IT Free and fair — no ads, no subscriptions, ever Fast and simple — no learning curve, no clutter Beautiful in light and dark mode Quick enough that you'll actually stick with it Staying properly hydrated supports your energy, focus, and physical performance. Hydrate just makes it easy to keep up. Download Hydrate free and make drinking enough the easiest part of your day.
KLU Longevity
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Your blood holds the clues to your health — KLU helps you understand them. Snap a photo or upload a PDF of your blood test results, and KLU analyzes up to 87 biomarkers across 12 body systems — from heart health and metabolism to hormones and inflammation. Connect your wearables for a complete picture of your wellness. What you get: - A personalized Longevity Score that tracks how well your body is aging - Your estimated Biological Age — a wellness indicator based on your biomarker profile - Color-coded biomarker breakdowns so you see what's in range and what may need attention - Trend tracking across multiple blood tests to monitor changes over time - Fitness and recovery insights from your wearable devices - An AI Longevity Coach you can ask questions about your results Wearable & Health Integrations: - Apple Health — reads steps, heart rate, resting heart rate, sleep duration, active calories, and blood oxygen (SpO2) to complement your blood test insights. KLU does not write data to Apple Health. - Oura Ring — connect your account to sync sleep, readiness, activity, and heart rate data. - WHOOP — connect your account to sync recovery, strain, sleep, and workout data. All wearable connections are optional and require your explicit authorization. How it works: 1. Upload your blood test (photo or PDF) 2. KLU extracts and organizes your biomarkers automatically 3. Optionally connect Apple Health, Oura, or WHOOP for fitness data 4. Review your score, trends, and educational insights Understand your labs. Talk to your doctor with confidence. Important: KLU is designed for informational and educational purposes only. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any disease. It does not provide medical advice, diagnoses, or treatment recommendations. The information provided by KLU is not a substitute for professional medical advice. Always consult a qualified healthcare provider before making any decisions about your health. Your blood test data is processed using third-party AI services to extract and analyze biomarker values. Health and fitness data from connected devices is stored securely and used solely to provide you with personalized wellness insights.
Screenshots
Verdict
The clearest difference is update cadence: KLU Longevity at every 3 weeks against Hydrate App's every 16 months. KLU Longevity also leads on iOS requirement (16.6 vs 27.0). On price, ads, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Hydrate App ships an update every 16 months, KLU Longevity every 3 weeks. The most recent releases landed on September 15, 2026 and August 31, 2026 respectively.
| Parameter | Hydrate App | KLU Longevity |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 16 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, Apple Watch — better | iPhone |
| Requires iOS | 27.0 | 16.6 — better |
| Further details — not scored | ||
| Size | 13 MB | 92 MB |
| Age rating | 4+ | 17+ |
| Developer | Digitizr LLC | LifeUnlocked s.r.o. |
In-app purchases
Hydrate App
No in-app purchases
KLU Longevity
No in-app purchases
Questions
Is Hydrate App free?
Is KLU Longevity free?
Do Hydrate App or KLU Longevity have ads?
Which is updated more often, Hydrate App or KLU Longevity?
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