How many times did you cancel an appointment because you had another event at the same time?
How long have you been putting off what you really want to do? With Opus One, you can organize
your schedule, prioritize your tasks, write your to-do list, assign the events for the day, the week, the
whole month or even establish your personal long-term goals.
This app is ideal for you if:

● You look for something more than just a calendar, a tool that shows you your agenda, allows
you to reorganize, schedule and establish the most relevant events of each day.
● You need an alarm that reminds you of your tasks and meetings.
● You have different types of events, at home or with friends, and you need that your personal
planner helps you to divide them by categories.
● You want to write down your ideas, reminders, important data or contacts; with text, voice
notes or even locations on the map.
● You have long-term plans, and you want to keep the track of.
● You look for daily motivation from great leaders who discovered that by being masters of
their time, they could fulfill all their purposes.
If you want even more, you can buy the universal subscription of Opus One to get:
● Weather information and forecast up to the next 10 days of the city where you are.
● Synchronization of your notes, tasks and events in the cloud of other iOS devices and MacOs.
● Sketch drawing canvas optimized for Apple Pencil.
● Categories color-coded.
● Add tasks using Siri.
● Planner themes to give your personal touch to your agenda.

Keep in mind that this subscription will be charged to your iTunes account and it will be
automatically renewed unless you deactivate this feature 24 hours before the current period.
Remember that you won’t be able to cancel it at the period that it’s already active.

You just dedicated a few minutes of your hectic schedule to read up to here, now, you just need to
download the app on your iPhone or MacBook to check how we can turn each of those minutes into
fulfilled projects, without cancellations or delays.

Check out our Privacy Policy:

Check out our Terms of Services:

What’s New

Version 1.7.6

• Added option to set the default calendar from within Opus One.
• Improved battery performance.
• New Onboarding Step.

√ Fixed Voice Recorder.
√ Spelling Corrections.
√ Bug Fixes.

Ratings and Reviews

4.0 out of 5
56 Ratings

56 Ratings

Pajica ,

Opus One is Fantastic!

Opus One is unlike any other app in the productivity category. What makes it completely unique is its emphasis on life leadership rather than just project or task management. If all you’re looking for is a simple way to list your things to do, there are many lighter programs to accomplish that. But if you want a comprehensive program that does a deep dive into exploring and connecting how your life mission and personal values determine your goals and projects, and how those help to create life balance, positive motivation, and steady progress toward life success, this is the only program I have ever seen that accomplishes all that.

The structure is similar to a very popular paper organizer that includes tabs for the most important aspects of an organized life. Starting with defining mission and values, Opus One walks you through the process, step-by-step with great tutorials, so that by the time you’re finished, you have identified what’s most important to you in the various roles you play, how you want to express that through projects and goals, and how to break those down using a weekly “compass” and daily to-do’s to keep you on track to achieving a sane, balanced life.

A very reasonable yearly subscription is required to access all the features I mention above, but one fee opens the app on all devices and I have found its value in terms of increased focus and productivity well worth the price.

Developer Response ,

Hi Pajica! Thank you so much for your feedback :)

TravelPam ,

Best Productivity App I Have Purchased

I think I have only written one other review, but I am using this app so much that I thought I would give the team there a “shout out.” I have purchased and/or used about a dozen calendar and to-do apps over the past few years. It always seemed that something was missing in each of them—not so with Opus One. It lets me use the hybrid David Allen, Franklin Covey system I use, just like I would on paper. Syncs well with iPhone, iPad, MacMini and MaxAir. As one other reviewer mentioned, I initially had a glitch getting them all to sync, but the support team worked it out and set good information on what needed to be done and where. Unlike a lot of apps, this one has a full user manual. Although it is very easy to use, I have opened the manual (access from the Mac version) and got familiar with some of the deep functionality. I like the Eisenhower Matric and the Weekly Planner for that productivity overview I sometimes need. The only think they could add that would set my world on fire is the ability to use my Apple Pencil in the notes view on the iPad, but even there they thought things through with an icon for a date time stamp. Great app.

Happy2Golf ,

Love this app

As a fan of the Franklin Covey planning system, I love the ability that this app provides to keep track of and prioritize (by day) each of my daily tasks. Additionally, this app allows me the ability to keep track of a Master list of tasks that don’t need to be scheduled yet. I’m using the app across multiple platforms simultaneously, including my desktop MAC, MAC Book Pro, iPad Pro and my iPhone 7. At first it was working great, with all of the data being synchronized between all the devices. Then for some reason that I still don’t understand, my Pro subscription (of which I pay monthly) wasn’t being recognized by three of my four devices. After reaching out to Piso13 (developers of this app) support team, they were able to suggest some actions that eventually resulted in a successful solution where all devices are recognizing my Pro Subscription account again, thereby synchronizing my data across all platforms. Aside from this temporary challenge of which their support team was able to fix, I’m thrilled to have access to a great time and activity management tool. Love this app!


PISO 13, Inc.
39.2 MB

OS X 10.11 or later, 64-bit processor


English, Spanish

Age Rating
Rated 4+
© 2018 PISO 13, Ltd.


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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