# Parker Planner Classic (old version) vs Opus One

The clearest difference is rating: Opus One at 4.7 against Parker Planner Classic (old version)'s 4.0. Opus One also leads on ratings volume (978 vs 8) and review sentiment (66% vs 46%). Parker Planner Classic (old version)'s advantage is in-app purchases (none vs 2) and iOS requirement (7.0 vs 15.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Opus One sells 2 in-app purchases, starting at $4.99 per month. Parker Planner Classic (old version) asks for nothing beyond the download.

Opus One holds the better App Store score, 4.7 against 4.0. That said, the two scores are not equally well evidenced: Opus One has 978 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 46% of Parker Planner Classic (old version)'s written reviews are positive against 66% of Opus One's.

Parker Planner Classic (old version) ships an update monthly, Opus One every 3 weeks. The most recent releases landed on October 19, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | Parker Planner Classic (old version) | Opus One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (8 ratings)](https://appshunter.io/ios/app/parker-planner-classic-old-version/id505750841/reviews) | **[4.7 (978 ratings)](https://appshunter.io/ios/app/opus-one-digital-planner/id941852977/reviews)** |
| Number of ratings | 8 | **978** |
| Positive reviews | 46.1% of reviews | **65.7% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | **Paid** | Subscription |
| Size | 5 MB | 187 MB |
| Requires iOS | **7.0** | 15.0 |
| Devices | iPhone, 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

### Parker Planner Classic (old version)

[App page](https://appshunter.io/ios/app/parker-planner-classic-old-version/id505750841)

This is the legacy version of a productivity app, originally released in 2012. It offers quick to-do list creation and notes that can be pinned to specific days. The app is no longer supported and will be removed from the App Store soon.

**Highlights:** Two-tap entry, Quick to-do list, Pinned notes, Legacy version, No longer supported

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

**In-app purchases:** none

**What reviewers like**

- 👍 All-in-one interface combining calendar, to-do list, and notes
- 📅 Clean, simple, and intuitive design layout
- 🔄 Syncs seamlessly with Google Calendar and iCal
- ⚡ Fast and responsive performance when working properly
- 📝 Easy event and task entry

**What reviewers complain about**

- 🐛 Frequent crashes and stability issues
- ❌ Calendar entries disappearing after saving
- 🔴 Notes not persisting properly
- 📱 Poor optimization for newer iPhone models
- 🚫 No landscape/orientation mode support

**Reported bugs**

- App crashes on launch or when opening
- Crashes when adding or editing events
- Crashes when switching between views
- Calendar entries disappear after saving
- Notes disappear when pressing done

**Requested features**

- Sync to-do lists with Apple Reminders app
- iPad and multi-device support
- Landscape orientation mode
- Date-specific to-do items with due dates
- Advanced recurring event options (every other day, specific dates, etc.)


### 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 Parker Planner Classic (old version) free?

Parker Planner Classic (old version) is free to download, with no in-app purchases.

### Is Opus One free?

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

### Which has better reviews, Parker Planner Classic (old version) or Opus One?

Opus One is rated higher. Parker Planner Classic (old version) averages 4.0 out of 5 from 8 ratings, while Opus One averages 4.7 from 978 ratings.

### Do Parker Planner Classic (old version) or Opus One have ads?

Neither Parker Planner Classic (old version) nor Opus One shows ads.

### Which is updated more often, Parker Planner Classic (old version) or Opus One?

Parker Planner Classic (old version) ships an update monthly, and Opus One every 3 weeks. Most recently, Parker Planner Classic (old version) was updated on October 19, 2026 and Opus One on October 26, 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.*