HydroDay vs EULJI
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
HydroDay
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HydroDay : A Minimal, Private Hydration Tracker This is a simple yet precise hydration tracking app designed to help you understand your daily drinking habits No accounts, no cloud, no tracking โ all data stays securely on your device Stay hydrated, build healthy habits, and see your progress across days, weeks, and months. - Beautiful & Effortless Tracking - Quick input for instant logging - Intuitive icons for different cup sizes Clean daily dashboard that updates automatically Weekly & Monthly Insights - Visual summaries that reveal your hydration patterns - Goal vs. actual tracking for each day - Tap into any date to view detailed logs Edit & Delete Anytime - Fix incorrect entries in one tap - Easily adjust past records Privacy You Can Trust - All data is stored only on your device - Works fully offline - Your hydration journey is yours alone
EULJI
Get personalized fitness guidance with an AI coach. Track your progress, manage your diet, and stay motivated with 24/7 support. Save useful advice and review it anytime.
- AI 1:1 coaching
- Real-time chat support
- Personalized fitness plans
- Weight and InBody tracking
- Personal best record management
- Scrap useful advice
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EULJI brings your meals, workouts, weight and body composition records together with personalized fitness guidance. TODAY See your daily records, calories, commitments and logging streak at a glance. EULJI Chat with EULJI about fitness and nutrition. Read full-width replies in a dark layout and copy questions or answers. Review the records suggested in chat before saving them. RECORDS View and edit your saved meal, workout, weight and body composition records. REPORTS Explore calorie, body composition and workout trends over the recent 7, 30 or 90 days, or the current week, current month and three-month calendar periods. PROFILE Manage your personal EULJI memory, profile, language preferences and subscription. Contact the EULJI team from Profile. The app supports English and Korean. FREE AND PREMIUM โข Free: 20 messages with EULJI per day and up to 20 saved records in total across meals, workouts, weight and body composition. โข Premium: no daily message limit and unlimited record storage. โข Hidden records do not use a storage slot. Restore them when a slot is available. โข Monthly Premium subscription: โฉ9,900 per month, automatically renewed. Manage or cancel it in App Store subscriptions. AI responses from EULJI provide general fitness and lifestyle information. They do not replace diagnosis or treatment by a qualified healthcare professional. Consult a healthcare professional about decisions related to your health. Support: eulji_support@naver.com Terms of Use: https://eulji-fitness.web.app/en/terms.html Privacy Policy: https://eulji-fitness.web.app/en/privacy-policy.html
Screenshots
Verdict
The clearest difference is in-app purchases: HydroDay at none against EULJI's 1. EULJI's advantage is ads (none vs shown) and device support (3 vs 1). On price 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
Both are free to download. EULJI sells 1 in-app purchase, starting at $6.99 per month. HydroDay asks for nothing beyond the download.
| Parameter | HydroDay | EULJI |
|---|---|---|
| Price | Free | Free |
| Positive reviews | โ | 100.0% of reviews |
| Update frequency | โ | Every 3 days |
| Ads | Yes | No โ better |
| In-app purchases | No โ better | Yes |
| Monetization | โ | Freemium |
| Devices | iPhone | iPhone, iPad, iPod โ better |
| Requires iOS | 17.0 | 15.0 โ better |
| Further details โ not scored | ||
| Size | 37 MB | 73 MB |
| Age rating | 4+ | 12+ |
| Developer | Geonung Cheong | eulji ai |
In-app purchases
HydroDay
No in-app purchases
EULJI
- Monthly Subscription$6.991 Month









