# ParkerPlanner vs Opus One

The clearest difference is rating: Opus One at 4.7 against ParkerPlanner's 4.1. Opus One also leads on ratings volume (977 vs 34) and update cadence (every 3 weeks vs every 6 weeks). ParkerPlanner's advantage is review sentiment (78% vs 66%). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Opus One holds the better App Store score, 4.7 against 4.1. That said, the two scores are not equally well evidenced: Opus One has 977 ratings behind it against 34, so its average is the more settled of the two. Written reviews complicate that: 78% of ParkerPlanner's written reviews are positive against 66% of Opus One's, so the app with the better star average is not the one people write more warmly about.

ParkerPlanner ships an update every 6 weeks, Opus One every 3 weeks. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | ParkerPlanner | Opus One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.1 (34 ratings)](https://appshunter.io/ios/app/parkerplanner-cal-plus-todo-plus-note/id875164786/reviews) | **[4.7 (977 ratings)](https://appshunter.io/ios/app/opus-one-digital-planner/id941852977/reviews)** |
| Number of ratings | 34 | **977** |
| Positive reviews | **78.5% of reviews** | 65.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 weeks** |
| Monetization | Subscription | Subscription |
| Size | 12 MB | 187 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Matraex](https://appshunter.io/developer/945126015) | [PISO 13, Inc.](https://appshunter.io/developer/940653452) |

## What reviewers say

### ParkerPlanner

[App page](https://appshunter.io/ios/app/parkerplanner-cal-plus-todo-plus-note/id875164786)

This app combines your calendar, to-do lists, and notes into a single, organized platform. Syncs with native iOS Reminders and Notes, allowing for tag-based organization and multiple view options for your tasks.

**Highlights:** Syncs with iOS Reminders, Syncs notes across devices, Organize notes with tags, View todos on Month, Day, List, Create and organize todo lists, Syncs with native iPhone calendar

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Access | $1.99 | per month |
| Unlimited Access | $19.99 | per year |

**What reviewers like**

- 👍 All-in-one app (calendar, todos, notes)
- 👍 Simple and easy to use interface
- 👍 Helpful for organization
- 👍 Good customer service (historical)
- 👍 Customizable features

**What reviewers complain about**

- 🐛 App no longer working reliably
- 🐛 Lack of recent updates
- 🐛 Subscription-based with no updates
- 🐛 Difficult to trial without providing email
- 🐛 No free version

**Reported bugs**

- Events not appearing consistently
- Cannot sync with Google nor Calengoo (historical)
- Deleting a list in Parker Planner also deletes in Reminders
- Cannot choose which reminder lists to hide/show
- Glitch with to-dos: won't let me delete a subject

**Requested features**

- More color options for themes
- Web platform
- Notes integration (historical)
- Calendar view with more detail (like Fantastical 2)
- Option to hide to-dos


### 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


## Frequently asked questions

### Is ParkerPlanner free?

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

### Is Opus One free?

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

### Which has better reviews, ParkerPlanner or Opus One?

Opus One is rated higher. ParkerPlanner averages 4.1 out of 5 from 34 ratings, while Opus One averages 4.7 from 977 ratings.

### Do ParkerPlanner or Opus One have ads?

Neither ParkerPlanner nor Opus One shows ads.

### Which is updated more often, ParkerPlanner or Opus One?

ParkerPlanner ships an update every 6 weeks, and Opus One every 3 weeks. Most recently, ParkerPlanner was updated on October 23, 2026 and Opus One on October 24, 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.*