# COVE9 vs The Open Diary

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.

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.

## The numbers

| Metric | COVE9 | The Open Diary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.0 (4 ratings)](https://appshunter.io/ios/app/the-open-diary/id1669238279/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 0.0% of reviews | **80.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 136 MB | 48 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [KaHa Pte Ltd.](https://appshunter.io/developer/1178524096) | [Kiaan Community Private Limited](https://appshunter.io/developer/1669238281) |

## What reviewers say

### COVE9

[App page](https://appshunter.io/ios/app/cove9/id1512181496)

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.

**Highlights:** Body temperature monitoring, Heart rate tracking, Sleep quality analysis, All-day activity tracking, Fitness rank and badges, Health and fitness buddy sharing, Intelligent alerts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### The Open Diary

[App page](https://appshunter.io/ios/app/the-open-diary/id1669238279)

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.

**Highlights:** Write freely and privately, Share with a supportive community, Edit entries anytime, Read and react to others' stories, Receive thoughtful replies, Connect with therapists

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is COVE9 free?

COVE9 is free to download, with no in-app purchases.

### Is The Open Diary free?

The Open Diary is free to download, with no in-app purchases.

### Do COVE9 or The Open Diary have ads?

Neither COVE9 nor The Open Diary shows ads.

### Which is updated more often, COVE9 or The Open Diary?

COVE9 ships an update every 3 weeks, and The Open Diary every 2 weeks. Most recently, COVE9 was updated on November 3, 2026 and The Open Diary on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*