Comparison

Opus One vs Green Thumbometer

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

Green Thumbometer

This app helps gardeners plan and track their tasks with customizable monthly checklists, a gardening journal, and a shopping list. It provides seasonal task guidance based on hemisphere and includes a map to find local gardening stores.

Highlights
  • Customizable monthly gardening checklists
  • Gardening journal with notes and photos
  • In-app shopping list
  • Gardening store locator map
  • Seasonal task customization by hemisphere
  • Task sharing and integration with other apps
Features
Read full description

Green Thumbometer The Gardening App Not sure what to do when to keep your yard and garden beautiful? Enter Green Thumbometer, the combination gardening to-do list, calendar, journal and information source that helps you know what to do when to achieve green thumb status. With a few swipes of your thumb, Green Thumbometer gives you simple monthly gardening checklists that you can customize to meet your own garden’s needs. This app is for gardeners who: Want a beautiful yard and fruitful garden but aren’t sure what to do and when to do it to make that happen. Green Thumbometer takes out a ton of the guesswork. Want to combine a gardening calendar and to-do list with an on-going record of their gardening complete with notes, photos and handy links to YouTube videos and other gardening information. Don’t want to waste time figuring out what they need to do on Saturday morning to maintain their yard and garden. They just want a handy list they can plow through before going on with the weekend. Want to keep all of the information about their garden handy in their smartphones so they can consult it while they’re out working in the yard. Green Thumbometer has these features: MONTHLY LISTS OF EASY GARDENING TASKS Each month has a standard checklist of easy seasonal gardening tasks as well as tasks needed to grow specific vegetables and fruits. You can customize the tasks by adding, deleting and editing them. Add handy notes, links and photos for your future reference. For tasks specific to particular plants, you can add one of our custom icons so it’s simple to spot that task in your checklists. Your checklists are a gardening journal that you can continue to use and customize from year to year. They are a rich customizable source of gardening information about growing the plants you love. SHARE TASKS WITH OTHERS, SET REMINDERS, ADD TO OTHER PRODUCTIVITY APPS You can share your tasks with other people via email, text messages and social media. You can add tasks to your Reminders and to other productivity apps. SHOPPING LIST You can add plants, gardening tools and supplies that you need to buy to an in-app shopping list. FIND A GARDENING STORE NEAR YOU ON A MAP Green Thumbometer’s map is customized to show the locations of gardening stores near you so you can pick up the items you need. CUSTOMIZED FOR SEASONAL TASKS Most gardening tasks are seasonal. Green Thumbometer allows you to designate in the settings whether you live in the northern or southern hemisphere so that seasonal tasks will appear during the appropriate months for your location. STATS Green Thumbometer’s Stats section helps you track over a year’s time how you are doing in maintaining your yard and garden. It’s your own Green Thumbometer. Green Thumbometer was invented by busy amateur gardeners who get it that you want to keep your yard and garden in good shape, not spend your time frustrated because you don’t want to do next. We’ve tried to get gardening down to the simplest level possible so you can enjoy it and your yard. We’re committed to providing you with a reliable app that you can use on an on-going basis and can depend on to be updated as needed to meet your needs.

Screenshots

Opus One4 screens
Green Thumbometer4 screens

Verdict

The call

The clearest difference is review sentiment: Opus One at 66% against Green Thumbometer's 0%. Opus One also leads on price (Free vs $2.99) and rating (4.7 vs 2.0). Green Thumbometer's advantage is in-app purchases (none vs 2). On ads and iOS requirement 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

Opus One is free to download; Green Thumbometer costs $2.99 up front. Opus One sells 2 in-app purchases, starting at $4.99 per month. Green Thumbometer asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Opus One holds the better App Store score, 4.7 against 2.0. That said, the two scores are not equally well evidenced: Opus One has 973 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 66% of Opus One's written reviews are positive against 0% of Green Thumbometer's.

UpkeepUpdate frequency

Opus One ships an update every 3 weeks, Green Thumbometer every 3 months. The most recent releases landed on October 18, 2026 and September 27, 2026 respectively.

Scorecard8 real differences · 2 level
Opus One versus Green Thumbometer: the parameters behind the verdict, then further details
ParameterOpus OneGreen Thumbometer
PriceFree — better$2.99
Rating4.7 (973 ratings) — better2.0 (1 ratings)
Positive reviews65.7% of reviews — better0.0% of reviews
Number of ratings973 — better1
Update frequencyEvery 3 weeks — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationSubscriptionPaid — better
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPod
Requires iOS15.0 — better15.6
Further details — not scored
Size187 MB11 MB
Age rating4+4+
DeveloperPISO 13, Inc.Forrest Anderson

Customer experience

Opus One

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

Green Thumbometer

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

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

Green Thumbometer

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

Green Thumbometer

No in-app purchases

Questions

Is Opus One free?
Opus One is free to download, with in-app purchases available.
Is Green Thumbometer free?
Green Thumbometer costs $2.99, with no in-app purchases.
Which has better reviews, Opus One or Green Thumbometer?
Opus One is rated higher. Opus One averages 4.7 out of 5 from 973 ratings, while Green Thumbometer averages 2.0 from 1 ratings.
Do Opus One or Green Thumbometer have ads?
Neither Opus One nor Green Thumbometer shows ads.
Which is updated more often, Opus One or Green Thumbometer?
Opus One ships an update every 3 weeks, and Green Thumbometer every 3 months. Most recently, Opus One was updated on October 18, 2026 and Green Thumbometer on September 27, 2026.

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