Comparison

ParkerPlanner 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

ParkerPlanner

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
Read full description

Welcome to the all-new Parker Planner! You can now: - Sync all todos with the Reminders iOS app - Sync Notes across devices - Organize notes via tags - See todos with due dates on Month, Day, and List View - Create and organize todo lists by name - Tons more! Needless to say we're crazy excited about all these new features. Also keep in mind we're going to be updating this app regularly and making consistent improvements all the time. - - - - - - - - - - - - - - - - - - - - - - Parker Planners began in 2006 as a paper planner company. Ethan Parker was a student at BYU and didn't like any of the planners at the Bookstore so he created his own. Not really intending on starting a business, he began selling planners to interested classmates until the BYU Bookstore took interest. Our products started out as pocket-sized paper planners and that’s why it converted to iPhone so well! “It’s in the day view that everything comes together, literally.” — Appadvice "To-do list, calendar, and notes app in one." — PCMag “A handy all-in-one organizational tool to make life easier.” — 148Apps *Your native iPhone calendar easily syncs with Google, Outlook, and many others. The Parker Planner will display any Calendar or Reminder that you have synced to your phone. The app now has a subscription model so we can keep and serve loyal customers. - - - - - - - - - - - - - - - - - - - - - - Details on Subscription: You can choose between monthly ($1.99) or annual ($19.99) subscription. Annual gets you 17% off the cost! This subscription will auto-renew through your iTunes account. We display in the settings of the app what type of subscription you have. A link is provided to manage your subscription. You may cancel the subscription or disable auto-renew at any time. There is a trial period of 7 days (non-consecutive!) for the subscription to make sure you find Parker Planner useful. All features are available during the trial. Any unused portion of the free trial period will be forfeited when you purchase a subscription. Payment will be charged to your iTunes Account at confirmation of purchase. The subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. The account will be charged for renewal within 24-hours prior to the end of the current period at the original subscription price. Privacy Policy - http://www.parkerplanners.com/privacy-policy.html EULA - http://www.parkerplanners.com/eula.html If you have any questions please email us at plannerlove@parkerplanners.com instead of leaving a bad review on iTunes. It'll help tons more.

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

ParkerPlanner4 screens
Opus One4 screens

Verdict

The call

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.

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. 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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
ParkerPlanner versus Opus One: the parameters behind the verdict, then further details
ParameterParkerPlannerOpus One
PriceFreeFree
Rating4.1 (34 ratings)4.7 (977 ratings) — better
Positive reviews78.5% of reviews — better65.7% of reviews
Number of ratings34977 — better
Update frequencyEvery 6 weeksEvery 3 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionSubscription
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Apple Watch — better
Requires iOS14.0 — better15.0
Further details — not scored
Size12 MB187 MB
Age rating4+4+
DeveloperMatraexPISO 13, Inc.

Customer experience

ParkerPlanner

All ratings34 ratings
Positive70.6%
Neutral8.8%
Negative20.6%
Written reviews65 reviews
Positive78.5%
Neutral1.5%
Negative20.0%

Opus One

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

User reviews

ParkerPlanner

From 34 App Store ratings

What we love

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

Room to improve

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

Opus One

From 977 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

ParkerPlanner

Reported bugs

7 issues
  • 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
Show 2 more
  • Jump To Icon doesn't work (closes app)
  • App crashes, freezes, and does not let me access information (historical)

Requested features

7 requests
  • More color options for themes
  • Web platform
  • Notes integration (historical)
  • Calendar view with more detail (like Fantastical 2)
  • Option to hide to-dos
Show 2 more
  • Todo list by day and option to keep until completed
  • Make app free instead of subscription

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

2 purchases

ParkerPlanner

Subscriptions2
  • Unlimited Access14 Days trial$1.991 Month
  • Unlimited Access14 Days trial$19.991 Year
2 purchases

Opus One

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

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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