Opus One vs Countdown Builder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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/
Countdown Builder
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Countdown Builder- Beautiful Event Countdowns Never miss another important moment with Countdown Builder Track birthdays, holidays, deadlines, trips, and all your important dates with beautiful, customizable countdowns. Whether it's a wedding day, vacation, project deadline, or just counting down to the weekend – Countdown Builder helps you visualize the time remaining and stay organized. STUNNING VISUAL COUNTDOWNS Create elegant countdown timers with personalized colors and styles View precise countdowns showing days, hours, minutes, and seconds Choose from beautiful event templates or create custom events Personalize your events with custom colors from a wide palette SMART ORGANIZATION Organize events with categories and custom colors Import events directly from your calendar Schedule recurring events like birthdays or weekly meetings Easily search and filter events to find what matters most NOTIFICATIONS THAT WORK FOR YOU Get notified at custom intervals before your events Set multiple reminders for each event Never miss an important deadline or special occasion again Customize notification messages for each event SEAMLESS ACROSS ALL YOUR DEVICES Sync events automatically between your iPhone, iPad, and Mac Create an event on one device and see it instantly on all others Consistent, native experience designed for each platform iCloud sync keeps everything up-to-date everywhere DESIGNED FOR CONVENIENCE Add detailed notes and location information to each event Access all your events with an intuitive, clean interface Dark mode support for comfortable viewing day or night Widgets for at-a-glance access to your most important countdowns Download now and never lose track of important moments again! Terms of Use: https://sites.google.com/view/eventcountdownapp/terms-and-condition Privacy Policy: https://sites.google.com/view/eventcountdownapp/privacy-policy
Screenshots
Verdict
The clearest difference is price: Opus One at Free against Countdown Builder's $0.99. Opus One also leads on ads (none vs shown) and iOS requirement (15.0 vs 17.0). On update cadence, in-app purchases and device support 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
Opus One is free to download; Countdown Builder costs $0.99 up front. Opus One sells 2 in-app purchases, starting at $4.99 per month and Countdown Builder sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Opus One ships an update every 3 weeks, Countdown Builder every 2 weeks. The most recent releases landed on September 30, 2026 and September 29, 2026 respectively.
| Parameter | Opus One | Countdown Builder |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.7 (955 ratings) — better | — |
| Positive reviews | 65.7% of reviews | — |
| Number of ratings | 955 — better | — |
| Update frequency | Every 3 weeks | Every 2 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | — |
| Devices | iPhone, iPad, iPod, Apple Watch — better | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 184 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | PISO 13, Inc. | Kalavathi Ekambaram |
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 moreShow fewer
- Allow customization of UI and themes
Countdown Builder
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Opus One
- Opus One Pro7 Days trial$4.991 Month
- Opus One Professional7 Days trial$39.991 Year
Countdown Builder
- EventCountdown Premium$0.99
Questions
Is Opus One free?
Is Countdown Builder free?
Do Opus One or Countdown Builder have ads?
Which is updated more often, Opus One or Countdown Builder?
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