COVE9 vs The Open Diary
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
COVE9
This app connects to a wearable device to monitor your body temperature, heart rate, activity, and sleep. It provides alerts for temperature deviations and offers features like fitness rankings and social sharing to support your health and wellness journey.
- Body temperature monitoring
- Heart rate tracking
- Sleep quality analysis
- All-day activity tracking
- Fitness rank and badges
- Health and fitness buddy sharing
- Intelligent alerts
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The COVE9 app allows you to link your device with your mobile phone. The COVE9 device can monitor your body temperature, activity, workouts & sleep. With COVE9, you will find a more targeted approach to managing your health & wellness Auto Body Temperature Monitoring With in-built body temperature monitor, keep track of your temperature anytime anywhere. Body Temperature Alerts Receive alerts when your body temperature is out of ideal range. Auto Heart Rate Monitoring Stay on top of your health, monitor your heart rate automatically and keep track of your heart rate trend. Auto Sleep Tracking Track your sleep quality and trends automatically. All-Day Activity Tracking Keep track of your daily activities like steps, distance and calories burned. Fitness Rank & Badges Earn badges as you keep fit and monitor how you stack up against others. Health & Fitness Buddies Share your health and fitness progress with your friends & loved ones. Intelligent Alerts Receive alerts for calls, SMS, social messages, emails and sedentary reminders. Health: Apple Health is integrated with this app so that you can track your health with awesome features of the Apple Health Application. Note: This App must be used with COVE9 band. Remote monitoring is enabled by default on this App and all your data can be remote monitored.
The Open Diary
A private digital journal for expressing thoughts and feelings without judgment. Connect with a supportive community, share your experiences, and receive thoughtful replies. Optionally, seek guidance from therapists within the app.
- Write freely and privately
- Share with a supportive community
- Edit entries anytime
- Read and react to others' stories
- Receive thoughtful replies
- Connect with therapists
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Some thoughts are too heavy to keep inside. Sometimes, they stay there because saying them out loud feels impossible. You don't know where to begin. You don't know who will understand. And sometimes, you worry you'll be judged before you're even heard. So you stay quiet. We built The Open Diary for moments like these. A quiet place where you can write whatever is on your heart. No pressure. No pretending. No need to have the right words. Just you, your thoughts, and a community that listens. More than 58,423 people have already shared their thoughts here. Some came looking for advice. Some simply wanted someone to listen. Many just wanted to feel a little less alone. With Open Diary, you can: • Write freely, anytime. • Choose whether your diary stays private or is shared with the community. • Edit your diary whenever you want. • Read real stories from people around the world. • Comment, react, and support others. • Receive thoughtful replies from people who understand. • Tag therapists in your diary when you'd like professional guidance. • Book sessions with experienced therapists whenever you're ready. Every diary shared with the community is first reviewed by our AI to help reduce spam, scams, and harmful content, creating a safer space for genuine conversations.
Screenshots
Verdict
The clearest difference is review sentiment: The Open Diary at 80% against COVE9's 0%. COVE9's advantage is iOS requirement (11.0 vs 15.1). 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. Neither carries in-app purchases, so what you see is what you pay.
COVE9 ships an update every 3 weeks, The Open Diary every 2 weeks. Both last shipped on November 3, 2026.
| Parameter | COVE9 | The Open Diary |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.0 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | 80.0% of reviews — better |
| Number of ratings | — | 4 — better |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 136 MB | 48 MB |
| Age rating | 4+ | 17+ |
| Developer | KaHa Pte Ltd. | Kiaan Community Private Limited |
Customer experience
COVE9
The Open Diary
In-app purchases
COVE9
No in-app purchases
The Open Diary
No in-app purchases









