# abcNotes Full Version vs Opus One

The clearest difference is price: Opus One at Free against abcNotes Full Version's $2.99. Opus One also leads on update cadence (every 3 weeks vs every 2 months). abcNotes Full Version's advantage is in-app purchases (none vs 2) and review sentiment (86% vs 66%). On rating, ratings volume, ads and device support there is nothing between them.

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

On the App Store both sit at effectively the same score — 4.8 for abcNotes Full Version against 4.7 for Opus One. Both are backed by a comparable volume of ratings — 882 and 955 respectively. Written reviews are what separate them: 86% of abcNotes Full Version's written reviews are positive against 66% of Opus One's.

abcNotes Full Version ships an update every 2 months, Opus One every 3 weeks. Both last shipped on October 6, 2026.

## The numbers

| Metric | abcNotes Full Version | Opus One |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.8 (882 ratings)](https://appshunter.io/ios/app/abcnotes-full-version/id354015291/reviews)** | [4.7 (955 ratings)](https://appshunter.io/ios/app/opus-one-digital-planner/id941852977/reviews) |
| Number of ratings | 882 | **955** |
| Positive reviews | **86.1% of reviews** | 65.7% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | **Paid** | Subscription |
| Size | 41 MB | 184 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [ALSEDI Group](https://appshunter.io/developer/331879616) | [PISO 13, Inc.](https://appshunter.io/developer/940653452) |

## What reviewers say

### abcNotes Full Version

[App page](https://appshunter.io/ios/app/abcnotes-full-version/id354015291)

This app allows you to create stylish and functional notes and to-do lists with a realistic paper sticky note feel. It offers extensive customization options for appearance and functionality, including iCloud synchronization and checklist management.

**Highlights:** iCloud Synchronization, Checklist style notes, Customizable appearance (backgrounds, skins, icons), Virtual desktops, Scale, rotate, and drag notes, Email and share notes, Save notes as images

**In-app purchases:** none


### Opus One

[App page](https://appshunter.io/ios/app/opus-one-digital-planner/id941852977)

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:** Family Sharing, Siri integration, Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Opus One Pro | $4.99 | per month |
| Opus One Professional | $39.99 | per year |

**What reviewers like**

- 🚀 Life changing
- 👍 Great app and support
- 👍 Integrates well with iPhone
- 👍 Keeps me organized and efficient
- 👍 Seamless sync across devices

**What reviewers complain about**

- 🐛 Sync issues and reliability problems
- 🐛 Lost data and app crashes
- 🔒 Concerns about free trial sign-ups
- 🔒 Difficult to cancel subscription
- 👎 Lacks weekly/monthly views

**Reported bugs**

- Sync issues between devices
- App crashes and data loss
- Keyboard not working on iPad
- Distorted font in calendar view

**Requested features**

- Add weekly and monthly views
- Improve Apple Pencil support
- Add project management features
- Integrate with more calendar/task apps
- Provide better training and tutorials


## Frequently asked questions

### Is abcNotes Full Version free?

abcNotes Full Version costs $2.99, with no in-app purchases.

### Is Opus One free?

Opus One is free to download, with in-app purchases available.

### Which has better reviews, abcNotes Full Version or Opus One?

abcNotes Full Version is rated higher. abcNotes Full Version averages 4.8 out of 5 from 882 ratings, while Opus One averages 4.7 from 955 ratings.

### Do abcNotes Full Version or Opus One have ads?

Neither abcNotes Full Version nor Opus One shows ads.

### Which is updated more often, abcNotes Full Version or Opus One?

abcNotes Full Version ships an update every 2 months, and Opus One every 3 weeks. Most recently, abcNotes Full Version was updated on October 6, 2026 and Opus One on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*