# Opus One vs Paper Planner, Diary, Calendar

The clearest difference is monetization model: Paper Planner, Diary, Calendar at free with in-app purchases against Opus One's subscription. Opus One's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 18.0). On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Opus One sells 2 in-app purchases, starting at $4.99 per month and Paper Planner, Diary, Calendar sells 9 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.7 for Opus One against 4.6 for Paper Planner, Diary, Calendar. Both are backed by a comparable volume of ratings — 984 and 1.1K respectively. Written reviews are what separate them: 66% of Opus One's written reviews are positive against 68% of Paper Planner, Diary, Calendar's.

Opus One ships an update every 3 weeks, Paper Planner, Diary, Calendar every 6 weeks. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | Opus One | Paper Planner, Diary, Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (984 ratings)](https://appshunter.io/ios/app/opus-one-digital-planner/id941852977/reviews)** | [4.6 (1.1K ratings)](https://appshunter.io/ios/app/paper-planner-diary-calendar/id977552680/reviews) |
| Number of ratings | 984 | **1.1K** |
| Positive reviews | 65.7% of reviews | **68.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 187 MB | 680 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [PISO 13, Inc.](https://appshunter.io/developer/940653452) | [Digital Legal Tech](https://appshunter.io/developer/1629338929) |

## What reviewers say

### Opus One

[App page](https://appshunter.io/ios/app/opus-one-digital-planner/id941852977)

This app helps you manage tasks and notes with a paperlike interface. Organize your day with daily task lists, schedules, and notes, and use a master task section to capture all your to-dos. Features include drag-and-drop reordering, event integration, and customizable notes.

**Highlights:** Master Task section, Daily Task lists with status, priority, and notes, Daily Schedule and Event integration, Daily Notes with customizable text formatting, Drag and drop task reordering, Cloud synchronization, Sketch drawing canvas

**Features:** Family Sharing, Siri integration, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Opus One Pro | $4.99 | per month |
| Opus One Professional | $39.99 | per year |

**What reviewers like**

- 🚀 Life changing
- 👍 Great app and support
- 👍 Integrates well with iPhone
- 👍 Keeps me organized and efficient
- 👍 Seamless sync across devices

**What reviewers complain about**

- 🐛 Sync issues and reliability problems
- 🐛 Lost data and app crashes
- 🔒 Concerns about free trial sign-ups
- 🔒 Difficult to cancel subscription
- 👎 Lacks weekly/monthly views

**Reported bugs**

- Sync issues between devices
- App crashes and data loss
- Keyboard not working on iPad
- Distorted font in calendar view

**Requested features**

- Add weekly and monthly views
- Improve Apple Pencil support
- Add project management features
- Integrate with more calendar/task apps
- Provide better training and tutorials


### Paper Planner, Diary, Calendar

[App page](https://appshunter.io/ios/app/paper-planner-diary-calendar/id977552680)

This digital planner offers a familiar paper organizer feel with modern digital convenience. Plan your days, weeks, and tasks with multiple views, rich formatting, and secure cloud syncing. Stay organized and achieve your goals with this intuitive tool.

**Highlights:** Multiple daily, two-day, four-day, and weekly views, Authentic paper planner design with customizable templates, Simple and intuitive interface for quick planning, Rich formatting options for events and tasks, Seamless synchronization with cloud storage, Customizable recurring events and smart reminders

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PREMIUM 1 month | $1.99 | per month |
| PREMIUM 1 year | $11.99 | per year |
| Holiday designs (lifetime) | $1.99 | one-time |
| 3D Shapes (lifetime) | $1.99 | one-time |
| Textures (lifetime) | $1.99 | one-time |
| Gradients (lifetime) | $1.99 | one-time |
| Paper Planner PRO (lifetime) | $6.99 | one-time |
| PREMIUM for PRO (lifetime) | $11.99 | one-time |
| PREMIUM (lifetime) | $23.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 👍 Simple and straightforward
- 🚀 Organized layout
- 👍 Resembles a paper planner
- 🚀 Efficient for planning

**What reviewers complain about**

- 🐛 Sync issues between devices
- 🐛 Recurring events not working properly
- 🔒 Lack of password protection or privacy features
- 🐛 Crashes or bugs after updates
- 👎 Limited customization options

**Reported bugs**

- Entries disappearing after device changes
- Recurring events not deleting properly
- Sync not working between iPhone and iPad
- App crashing after recent updates

**Requested features**

- Add monthly view option
- Integrate with Apple Calendar or Google Calendar
- Ability to set reminders or alerts
- Option to change font colors or styles
- Add a notes or budget section


## Frequently asked questions

### Is Opus One free?

Opus One is free to download, with in-app purchases available.

### Is Paper Planner, Diary, Calendar free?

Paper Planner, Diary, Calendar is free to download, with in-app purchases available.

### Which has better reviews, Opus One or Paper Planner, Diary, Calendar?

Opus One is rated higher. Opus One averages 4.7 out of 5 from 984 ratings, while Paper Planner, Diary, Calendar averages 4.6 from 1.1K ratings.

### Do Opus One or Paper Planner, Diary, Calendar have ads?

Neither Opus One nor Paper Planner, Diary, Calendar shows ads.

### Which is updated more often, Opus One or Paper Planner, Diary, Calendar?

Opus One ships an update every 3 weeks, and Paper Planner, Diary, Calendar every 6 weeks. Most recently, Opus One was updated on November 1, 2026 and Paper Planner, Diary, Calendar on November 6, 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.*