Comparison

Opus One vs Solid Planner

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

Head to head
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/

About

Solid Planner

This app helps you plan your day with a simple timer and agenda. It offers an AI review of your week, providing stats and insights to help you achieve your goals. Purchase it once to own it forever.

Highlights
  • Daily timer with task management
  • Goal pursuit tracking
  • AI weekly review and stats
  • One-time purchase, no subscriptions
  • Cross-device support (Mac, iPhone, iPad)
Read full description

No subscriptions - Buy once, keep forever Solid Planner is a simple timer + agenda app designed to help you take some time every day to think about what you'd like to do that day. 1. Start a timer and add your tasks 2. Complete your tasks and pursue your goals 3. Get an AI review of your week, stats and more Terms of service: http://solidapps.co/terms.html Privacy policy: http://solidapps.co/privacy.html

Screenshots

Opus One4 screens
Solid Planner4 screens

Verdict

The call

Opus One and Solid Planner both sit at 4.7 stars, but that hides the real split: 100% of Solid Planner's written reviews are positive against 66% of Opus One's. Solid Planner also leads on monetization model (paid vs subscription). Opus One's advantage is ratings volume (955 vs 10). On price, rating, 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 and Solid Planner sells 2 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for Opus One against 4.8 for Solid Planner. That said, the two scores are not equally well evidenced: Opus One has 955 ratings behind it against 10, so its average is the more settled of the two. Written reviews are what separate them: 66% of Opus One's written reviews are positive against 100% of Solid Planner's.

UpkeepUpdate frequency

Opus One ships an update every 3 weeks, Solid Planner monthly. The most recent releases landed on September 24, 2026 and August 2, 2026 respectively.

Scorecard3 real differences · 7 level
Opus One versus Solid Planner: the parameters behind the verdict, then further details
ParameterOpus OneSolid Planner
PriceFreeFree
Rating4.7 (955 ratings)4.8 (10 ratings) — better
Positive reviews65.7% of reviews100.0% of reviews — better
Number of ratings955 — better10
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionPaid — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, Mac
Requires iOS15.0 — better16.0
Further details — not scored
Size184 MB20 MB
Age rating4+4+
DeveloperPISO 13, Inc.Solid Apps S.R.L.

Customer experience

Opus One

All ratings955 ratings
Positive93.4%
Neutral2.6%
Negative4.0%
Written reviews318 reviews
Positive65.7%
Neutral10.1%
Negative24.2%

Solid Planner

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Bugs and requests

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

Solid Planner

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Opus One

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

Solid Planner

One-time2
  • Unlock this app (lifetime)$4.99
  • Unlock ALL 10 Solid Apps (lifetime)$9.99

Questions

Is Opus One free?
Opus One is free to download, with in-app purchases available.
Is Solid Planner free?
Solid Planner is free to download, with in-app purchases available.
Which has better reviews, Opus One or Solid Planner?
Solid Planner is rated higher. Opus One averages 4.7 out of 5 from 955 ratings, while Solid Planner averages 4.8 from 10 ratings.
Do Opus One or Solid Planner have ads?
Neither Opus One nor Solid Planner shows ads.
Which is updated more often, Opus One or Solid Planner?
Opus One ships an update every 3 weeks, and Solid Planner monthly. Most recently, Opus One was updated on September 24, 2026 and Solid Planner on August 2, 2026.

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