# Penzu vs OPAS Calendar

The clearest difference is review sentiment: Penzu at 52% against OPAS Calendar's 0%. Penzu also leads on rating (4.2 vs 1.7) and ratings volume (2.5K vs 7). OPAS Calendar's advantage is in-app purchases (none vs 3) and iOS requirement (11.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Penzu sells 3 in-app purchases, starting at $4.99 per month. OPAS Calendar asks for nothing beyond the download.

Penzu holds the better App Store score, 4.2 against 1.7. That said, the two scores are not equally well evidenced: Penzu has 2.5K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 52% of Penzu's written reviews are positive against 0% of OPAS Calendar's.

Penzu ships an update weekly, OPAS Calendar monthly. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Penzu | OPAS Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (2.5K ratings)](https://appshunter.io/ios/app/penzu/id452674732/reviews)** | [1.7 (7 ratings)](https://appshunter.io/ios/app/opas-calendar/id898227192/reviews) |
| Number of ratings | **2.5K** | 7 |
| Positive reviews | **52.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 62 MB | 9 MB |
| Requires iOS | 16.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [Penzu Inc.](https://appshunter.io/developer/452674735) | [OPAS Software GmbH](https://appshunter.io/developer/1704978541) |

## What reviewers say

### Penzu

[App page](https://appshunter.io/ios/app/penzu/id452674732)

This app provides a secure and private space for journaling, note-taking, and storing personal thoughts. It offers robust security features like password and PIN locks, encryption, and cloud syncing across devices. Users can also add photos and tags to their entries, making it a comprehensive digital diary.

**Highlights:** Unlimited journaling, Cloud sync for free, Password and PIN locks, Journal encryption, Add photos to entries, Search and tag entries, Offline writing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Penzu Pro Subscription | $4.99 | per month |
| Penzu Pro Subscription | $19.99 | per year |
| Penzu Pro Upgrade | $18.99 | one-time |

**What reviewers like**

- 🚀 Easy to use
- 🔒 Secure and private
- 📝 Convenient journaling on the go
- 🗓️ Helpful reminders and date tracking
- 💻 Syncs across devices

**What reviewers complain about**

- 🐛 Frequent crashes and bugs
- 🔑 Password issues and lockout problems
- 📁 Syncing and data loss issues
- 📱 Limited functionality on mobile app
- 💰 Expensive premium subscription

**Reported bugs**

- Keyboard disappearing during use
- Entries not saving or syncing properly
- Inability to access account after updates

**Requested features**

- More customization options for fonts, themes, and layouts
- Ability to export/backup journal entries
- Improved mobile app stability and features
- Better customer support and communication


### OPAS Calendar

[App page](https://appshunter.io/ios/app/opas-calendar/id898227192)

This application syncs with the OPAS online system to display your orchestra planning and administration dates on your mobile device. It requires an existing OPAS software license and online access to function.

**Highlights:** View OPAS dates on mobile, Syncs with OPAS online system, Requires OPAS software, Orchestra planning tool

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Penzu free?

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

### Is OPAS Calendar free?

OPAS Calendar is free to download, with no in-app purchases.

### Which has better reviews, Penzu or OPAS Calendar?

Penzu is rated higher. Penzu averages 4.2 out of 5 from 2.5K ratings, while OPAS Calendar averages 1.7 from 7 ratings.

### Do Penzu or OPAS Calendar have ads?

Neither Penzu nor OPAS Calendar shows ads.

### Which is updated more often, Penzu or OPAS Calendar?

Penzu ships an update weekly, and OPAS Calendar monthly. Most recently, Penzu was updated on October 23, 2026 and OPAS Calendar on October 24, 2026.

---

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