# MiiBook Journal vs Plan Universe

The clearest difference is ads: Plan Universe at none against MiiBook Journal's shown. Plan Universe also leads on update cadence (every 4 days vs monthly) and rating (5.0 vs 4.8). MiiBook Journal's advantage is ratings volume (5 vs 1) and iOS requirement (15.0 vs 27.1). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. MiiBook Journal sells 3 in-app purchases, starting at $1.99 per month and Plan Universe sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Plan Universe holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: MiiBook Journal has 5 ratings behind it against 1, so its average is the more settled of the two.

MiiBook Journal ships an update monthly, Plan Universe every 4 days. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | MiiBook Journal | Plan Universe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (5 ratings)](https://appshunter.io/ios/app/miibook-journal-private-diary/id6451179720/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/plan-universe/id6804596738/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Every 4 days** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 139 MB | 10 MB |
| Requires iOS | **15.0** | 27.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ryunosuke Nagase](https://appshunter.io/developer/1506451599) | [Mustafa Natur](https://appshunter.io/developer/1871733736) |

## What reviewers say

### MiiBook Journal

[App page](https://appshunter.io/ios/app/miibook-journal-private-diary/id6451179720)

This personal diary app offers a clean and engaging interface for easy daily journaling. It allows for quick entries, calendar reflections, and automatic monthly summaries, with a strong emphasis on user privacy as all data is stored locally.

**Highlights:** Instant entry upon opening, Calendar reflections, AI monthly summaries, Reminder notifications, Dark mode compatible, Home Widget, Local data storage

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM - MONTHLY | $1.99 | per month |
| PREMIUM - ANNUAL | $22.99 | per year |
| PREMIUM - LIFETIME | $49.99 | one-time |


### Plan Universe

[App page](https://appshunter.io/ios/app/plan-universe/id6804596738)

Visualize your goals and tasks as interactive mind maps. Generate plans using AI, organize with drag-and-drop functionality, and stay on track with a dedicated 'Today' view. Your data remains private, stored on your device and synced via iCloud.

**Highlights:** Goal-based mind map generation, Drag-and-drop branch organization, AI-assisted plan breakdown, On-device data processing, Integrated 'Today' task view, iCloud synchronization, Attachment support (photos, PDFs)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $2.99 | per month |
| Pro Yearly | $19.99 | per year |


## Frequently asked questions

### Is MiiBook Journal free?

MiiBook Journal is free to download, with in-app purchases available.

### Is Plan Universe free?

Plan Universe is free to download, with in-app purchases available.

### Which has better reviews, MiiBook Journal or Plan Universe?

Plan Universe is rated higher. MiiBook Journal averages 4.8 out of 5 from 5 ratings, while Plan Universe averages 5.0 from 1 ratings.

### Do MiiBook Journal or Plan Universe have ads?

MiiBook Journal shows ads; Plan Universe does not.

### Which is updated more often, MiiBook Journal or Plan Universe?

MiiBook Journal ships an update monthly, and Plan Universe every 4 days. Most recently, MiiBook Journal was updated on November 3, 2026 and Plan Universe on October 31, 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.*