Moodji vs Mellow
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Moodji
This app tracks your daily energy levels and mood, offering insights into your physical and mental well-being. It encourages healthy habits through gamified challenges, streaks, and community support, all visualized with expressive emojis and stickers.
- Real-time Body & Mind Battery
- Hourly Mood Recognition
- Healthy Habits Tracking
- Friend Challenges & Support
- Habit Streaks & Rewards
- Apple Watch Integration
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Bring your iPhone, and your Apple Watch (optional), and let Moodji accompany you in building great habits for sleep, step, and focus. Moodji is your intelligent companion, encouraging and supporting you on your journey to a healthier life. Moodji transforms cold, hard health data into visible mood states, displayed right in your iPhone app and on your Apple Watch face, giving you immediate emotional encouragement. ▶ Real-Time Body & Mind Battery: Sense Your Current Energy ◀ Every 10 minutes, Moodji calculates your "Body & Mind Battery" by monitoring your physical and mental activity across four dimensions: movement, steps, screen time, and focus. The rate of energy consumption and recovery is influenced by time in daylight, environmental noise, stress levels, and sleep quality. Your Body & Mind Battery intuitively reflects your current physical and mental energy levels: a high battery means you're energetic and ready for more activities; a low battery reminds you it's time to rest and recover. ▶ Hourly Mood: Understand Your Every Hour ◀ Based on your real-time Body & Mind Battery and other health data (sleep, heart rate, HRV, body temperature, blood oxygen, time in daylight, etc.), Moodji's "Mood Recognition Model" automatically summarizes your "Mood State" for each hour, turning data into empathetic Emojis and warm captions. Synced between your watch and phone, the dynamic watch face refreshes automatically every hour, presenting your current "Mood State" in real time. A brand-new real-time Status watch face captures your state fluctuations instantly. ▶ Healthy Habits: Team Up with Friends, Complete Daily Goals, Earn Leaves for Stickers ◀ Adjust daily behaviors like sleep, exercise, and screen time to achieve positive "Mood States" and light up your "Daily Habits," filling your day with vitality. Find habit buddies to check in together. Encourage, help, and grow with each other. Earn Leaf rewards and exchange them for a "vast collection" of expressive stickers in the "Sticker Shop" to personalize your Watch face. "Turn life into a game, and build healthy habits through play." ▶ Build Habits Through Streaks ◀ The daily streak mechanism provides extra motivation for consistency. The water-drop compensation mechanism makes maintaining streaks more achievable. "Consistency every day is most important; what you're consistent with is secondary." ▶ Community Donations & Mutual Support: Achieve Together ◀ Connect with friends through Leaves. You're not alone on your journey to better sleep, fitness, and phone habits. Help others to earn exclusive badges and gain community achievements. "If you want to go fast, go alone. If you want to go far, go together." ▶ Apple Watch: Big Usefulness on a Small Screen ◀ Deeply optimized interactions between your Watch and iPhone allow you to complete daily state awareness and interactive fun right from your Apple Watch. "Check your state on the Watch, review your day on the Phone." Core Product Philosophy 1: Data Fades, Mood Matters, Health as Companionship Moodji's goal is not precise tracking of steps or sleep data, but rather to help users become more self-aware and self-caring through daily tracking and companionship. Acting as a friend who "gets you," it shares joy in good moments and offers understanding and gentle reminders in tougher times, focusing primarily on emotional connection. The more time you spend together, the more it understands you. Moodji strictly adheres to privacy and data security standards. Moodji reads health data like walking and sleep via Apple's HealthKit API. Your health and activity data is stored only on your device or backed up to your personal iCloud. While Moodji supports health data from third-party watches (like Samsung, Garmin, Huawei, Xiaomi) via Apple HealthKit, the Moodji App is installed exclusively on Apple Watch. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Mellow
This health tracker analyzes your body data, including HRV, sleep quality, and heart rate, to provide insights into your physical condition. It offers personalized recommendations for relaxation and features dynamic watch faces that reflect your health status.
- HRV monitoring
- Sleep quality tracking
- Heart rate tracking
- Step count
- Wrist temperature monitoring
- Sun exposure tracking
- Personalized relaxation recommendations
- Dynamic smartwatch faces
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Mellow is a health tracker that analyzes your body data to help you understand your physical condition better and achieve a healthier lifestyle. Mellow analyzes your body by monitoring HRV (Heart Rate Variability), and also tracks metrics like sleep quality, heart rate, step count, wrist temperature, and sun exposure time. It visualizes these changes in charts and provides personalized recommendations to help you relax. Additionally, we've designed cute and stylish watch faces for smartwatch users. These faces change dynamically based on your physical state to remind you of your health—come experience it now! Privacy Policy:https://mellow.kelefanli.com/en_privacyPolicyIos User Agreement:https://mellow.kelefanli.com/en_userAgreementIos Member Agreement:https://mellow.kelefanli.com/en_monthly
Screenshots
Verdict
The clearest difference is review sentiment: Moodji at 94% against Mellow's 32%. Moodji also leads on rating (4.8 vs 4.0) and ratings volume (81 vs 4). On price, update cadence, ads and in-app purchases 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. Moodji sells 10 in-app purchases, starting at $4.99 per month and Mellow sells 24 in-app purchases, starting at $0.99 per 7 days. Whichever you choose, the download price is not the number that matters.
Moodji holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Moodji has 81 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 94% of Moodji's written reviews are positive against 32% of Mellow's.
Moodji ships an update every 10 days, Mellow fortnightly. Both last shipped on September 23, 2026.
| Parameter | Moodji | Mellow |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (81 ratings) — better | 4.0 (4 ratings) |
| Positive reviews | 94.4% of reviews — better | 31.8% of reviews |
| Number of ratings | 81 — better | 4 |
| Update frequency | Every 10 days — better | Fortnightly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Requires iOS | 16.0 | 16.0 |
| Further details — not scored | ||
| Size | 140 MB | 191 MB |
| Age rating | 12+ | 17+ |
| Developer | Flowzland Inc. | Chongqing Zhipingou Technology Co., Ltd. |
Customer experience
Moodji
Mellow
Bugs and requests
Moodji
Reported bugs
3 issues- Time display not updating automatically, requires manual refresh
- App crashes or becomes unusable suddenly
- Emoji colors appear solid without details on Apple Watch
Requested features
9 requests- Add 12-hour time format option
- Increase variety of watch faces
- Allow customization and addition of personal habits
- Add Russian language support
- Improve English translation clarity
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- Add panda emoji/character option
- Faster data update speed
- More customization options for adult users
- Ability to pause or disable certain habits
Mellow
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Moodji
- PLUS Monthly$4.991 Month
- PLUS Yearly$19.991 Year
- PLUS Yearly7 Days trial$19.991 Year
- Skin PLUS$1.49
- Skin$1.99
- PLUS Benefits Package$19.99
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- PLUS Lifetime Special Offer2 variants$24.99
- PLUS LifeTime$29.99
- PRO LifeTime$29.99
- Yearly Price$59.99
Mellow
- One-week Membership7 Days trial$0.997 Days
- 月会员$1.991 Month
- Monthly Membership$2.991 Month
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- Monthly Membership1 Month trial$4.991 Month
- Monthly Membership$4.991 Month
- 一个月会员$4.991 Month
- Monthly Membership$6.991 Month
- 周会员-首周优惠7 Days trial$6.997 Days
- Annual Membership$9.991 Year
- Monthly Membership3 Days trial$9.991 Month
- 年会员-7天免费试用7 Days trial$9.991 Year
- 一年会员$9.991 Year
- Monthly Membership2 variants$12.991 Month
- Annual Membership$12.991 Year
- Annual Membership2 variants$29.991 Year
- Annual membership$39.991 Year
- 季度会员$4.99
- 一年会员$7.99
- 永久会员$9.99
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- Lifetime Membership$12.99
- 永久会员$14.99
- Permanent Member$22.99
- Lifetime Membership$68.00
- Lifetime Membership$129.99







