Comparison

Parker Planner Classic (old version) vs Opus One

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Parker Planner Classic (old version)

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
Read full description

Parker Planner Classic is the legacy version of Parker Planner created in 2012 and is no longer supported. We want to still make this app available for a while for those who purchased it. Soon, however we'll be removing it from the AppStore as all our efforts will be spent on Parker Planner, a free to try and subscription-based productivity app. Welcome to the Parker Planner Classic, thank you for downloading this app. Super fast two-tap entry. Quick and easy to-do list. Notes that pin on the day you make them. Parker Planners began in 2006 as a paper planner company. Our products started out as pocket-sized and that’s why it converted to iPhone so well! This version of the app is no longer actively supported. Please see Parker Planner in the AppStore and bask in the glory of sync across devices, Reminder Sync, and multiple device support! Link to new app - http://apple.co/2mugEfe

About

Opus One

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
Read full description

Opus One is a real day planner, not another to-do app. Each day gets its own page — tasks with A/B/C priorities, your schedule, and notes — on a planner that looks and feels like paper. Plan on iPhone, iPad, and Mac, and it all stays in sync. YOUR DAY ON ONE PAGE • Daily Tasks with A/B/C priorities, status, notes, and alarms. • A schedule that shows your Calendar events alongside your tasks. • Drag a task onto the schedule — with task durations, the end time fills in automatically. • Daily Notes with photos, PDFs, checklists, and audio. • Today's weather and a daily quote, right on the page. PLAN BEYOND TODAY • Master Tasks: everything on your mind in one list, no due date required. • Goals with timelines, photos, and progress you can see. • Roles: review the areas of your life each week so nothing important gets crowded out. • Mission, Values, and Vision pages to keep the big picture one tap away. • Meeting Planner for agendas, decisions, and next steps. NOTES AND JOURNALS • Rich notes with fonts, colors, tags, and your own custom sections. • Sketch and handwrite with Apple Pencil. • Journals with 25 covers to choose from, plus a guided Gratitude Journal. IT GOES WHERE YOU GO • Home Screen widgets for today's tasks, your mission, your values, and daily quotes. • Live Activities keep today's tasks on your Lock Screen. • Add a task from Control Center, or ask Siri. • Apple Watch app to see your day and check off tasks from your wrist. • iCloud sync across iPhone, iPad, and Mac. MAKE IT YOURS • Planner themes, including seasonal ones. • Task-complete sounds and rewards for finishing what you planned. • Color-coded categories and repeating rules with advanced options. OPUS ONE PRO The core planner is free. Opus One Pro adds cloud sync across all your devices, weather, attachments (images, PDFs, audio), Apple Pencil sketching, categories, repeating rules, Goals, Siri, and themes. One subscription covers iPhone, iPad, and Mac on the same iCloud account. Available yearly or monthly. Subscription details: Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless auto-renew is turned off at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours before the period ends. Manage or cancel in your Account Settings. Privacy Policy: https://piso13.com/privacy-policy-2/ Terms of Service: https://piso13.com/terms-of-service/

Screenshots

Parker Planner Classic (old version)4 screens
Opus One4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Parker Planner Classic (old version) versus Opus One: the parameters behind the verdict, then further details
ParameterParker Planner Classic (old version)Opus One
PriceFreeFree
Rating4.0 (8 ratings)4.7 (978 ratings) — better
Positive reviews46.1% of reviews65.7% of reviews — better
Number of ratings8978 — better
Update frequencyMonthlyEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid — betterSubscription
DevicesiPhone, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS7.0 — better15.0
Further details — not scored
Size5 MB187 MB
Age rating4+4+
DeveloperMatraexPISO 13, Inc.

Customer experience

Parker Planner Classic (old version)

All ratings8 ratings
Positive62.5%
Neutral25.0%
Negative12.5%
Written reviews115 reviews
Positive46.1%
Neutral17.4%
Negative36.5%

Opus One

All ratings973 ratings
Positive93.6%
Neutral2.5%
Negative3.9%
Written reviews318 reviews
Positive65.7%
Neutral10.1%
Negative24.2%

User reviews

Parker Planner Classic (old version)

From 8 App Store ratings

What we love

  • 👍 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

Room to improve

  • 🐛 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

Opus One

From 978 App Store ratings

What we love

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

Room to improve

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

Bugs and requests

Parker Planner Classic (old version)

Reported bugs

18 issues
  • 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
Show 13 more
  • App freezes when editing existing appointments
  • Crashes on iOS 7 and older versions
  • Inability to add items to calendar
  • Blank page appears when clicking notes
  • Keyboard issues in note entry (missing done button)
  • Calendar display colors incorrect in week/today views
  • Unwanted calendars showing despite being unchecked
  • Cannot delete events properly
  • Event time changes reverting unexpectedly
  • App closes when accessing previous day entries
  • Scrolling issues in long notes
  • Month view not loading or missing after updates
  • To-do items not syncing properly after updates

Requested features

15 requests
  • 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.)
Show 10 more
  • Customizable colors for different calendars
  • Search functionality for events
  • Weekly and monthly goal tracking
  • Font and color customization
  • Ability to hide specific calendars properly
  • Default calendar selection for new events
  • Notification/reminder customization
  • Event location display on calendar view
  • Ability to assign importance levels to tasks
  • Current time block indicator in day view

Opus One

Reported bugs

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

Requested features

6 requests
  • Add weekly and monthly views
  • Improve Apple Pencil support
  • Add project management features
  • Integrate with more calendar/task apps
  • Provide better training and tutorials
Show 1 more
  • Allow customization of UI and themes

In-app purchases

None

Parker Planner Classic (old version)

No in-app purchases

2 purchases

Opus One

Subscriptions2
  • Opus One Pro7 Days trial$4.991 Month
  • Opus One Professional7 Days trial$39.991 Year

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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