# Opus One vs Bitacora.io

The clearest difference is in-app purchases: Bitacora.io at none against Opus One's 2. Bitacora.io also leads on review sentiment (100% vs 66%) and update cadence (every 5 days vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Opus One sells 2 in-app purchases, starting at $4.99 per month. Bitacora.io asks for nothing beyond the download.

Opus One ships an update every 3 weeks, Bitacora.io every 5 days. The most recent releases landed on September 30, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Opus One | Bitacora.io |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (955 ratings)](https://appshunter.io/ios/app/opus-one-digital-planner/id941852977/reviews)** | — |
| Number of ratings | **955** | — |
| Positive reviews | 65.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Subscription | **Free** |
| Size | 184 MB | 83 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [PISO 13, Inc.](https://appshunter.io/developer/940653452) | [Bitacora LLC](https://appshunter.io/developer/1583096726) |

## What reviewers say

### 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


### Bitacora.io

[App page](https://appshunter.io/ios/app/bitacoraio/id1584852398)

Record daily activities, work, and movements with detailed logs. Attach photos, files, and location data for easy organization and retrieval. Work offline and access your information through search by date or project name.

**Highlights:** Capture general logs, Log stock or asset movements, Record staff activity, Track income/expenses, Add photos and files, Organize by date and project, Offline logging capability

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Opus One free?

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

### Is Bitacora.io free?

Bitacora.io is free to download, with no in-app purchases.

### Do Opus One or Bitacora.io have ads?

Neither Opus One nor Bitacora.io shows ads.

### Which is updated more often, Opus One or Bitacora.io?

Opus One ships an update every 3 weeks, and Bitacora.io every 5 days. Most recently, Opus One was updated on September 30, 2026 and Bitacora.io on September 24, 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.*