Comparison

Opus One vs Shop Notes

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

Shop Notes

Read full description

Shop Notes is a shopping list with memory. It remembers what you buy, what you paid, and where you bought it. Create lists quickly, check items off smoothly, and build a useful shopping history over time. Shop Notes helps you see past prices, remember stores, and keep repeat purchases connected without digging through old notes or receipts. Built for everyday shopping: • Save items, prices, stores, and quantities • Check the last price before you buy again • Group repeat buys into one shopping memory • See past purchases in your item history • Organize multiple shopping lists • Quickly check off items while shopping • Simple, clean, and easy to use Whether you’re budgeting loosely, shopping smarter, or just tired of messy notes, Shop Notes keeps everything straightforward. No clutter. No complicated setup. Just a shopping list that remembers.

Screenshots

Opus One4 screens
Shop Notes4 screens

Verdict

The call

The clearest difference is in-app purchases: Shop Notes at none against Opus One's 2. Shop Notes also leads on iOS requirement (13.0 vs 15.0). Opus One's advantage is device support (4 vs 2). 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. Shop Notes asks for nothing beyond the download.

UpkeepUpdate frequency

Opus One ships an update every 3 weeks, Shop Notes monthly. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
Opus One versus Shop Notes: the parameters behind the verdict, then further details
ParameterOpus OneShop Notes
PriceFreeFree
Rating4.7 (984 ratings) — better—
Positive reviews65.7% of reviews—
Number of ratings984 — better—
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscription—
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size187 MB94 MB
Age rating4+4+
DeveloperPISO 13, Inc.Anameti Umoh

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

Shop Notes

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
None

Shop Notes

No in-app purchases

Questions

Is Opus One free?
Opus One is free to download, with in-app purchases available.
Is Shop Notes free?
Shop Notes is free to download, with no in-app purchases.
Do Opus One or Shop Notes have ads?
Neither Opus One nor Shop Notes shows ads.
Which is updated more often, Opus One or Shop Notes?
Opus One ships an update every 3 weeks, and Shop Notes monthly. Most recently, Opus One was updated on November 1, 2026 and Shop Notes on October 24, 2026.

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