# e vs OPAS Calendar

The clearest difference is rating: e at 4.7 against OPAS Calendar's 1.7. e also leads on review sentiment (36% vs 0%) and ratings volume (1.6K vs 7). OPAS Calendar's advantage is iOS requirement (11.0 vs 15.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

e holds the better App Store score, 4.7 against 1.7. That said, the two scores are not equally well evidenced: e has 1.6K ratings behind it against 7, so its average is the more settled of the two. Written reviews point the same way: 36% of e's written reviews are positive against 0% of OPAS Calendar's.

e ships an update every 3 weeks, OPAS Calendar monthly. The most recent releases landed on November 1, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | e | OPAS Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.6K ratings)](https://appshunter.io/ios/app/e-boksdk/id482926022/reviews)** | [1.7 (7 ratings)](https://appshunter.io/ios/app/opas-calendar/id898227192/reviews) |
| Number of ratings | **1.6K** | 7 |
| Positive reviews | **36.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free | Free |
| Size | 182 MB | 9 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [e-Boks](https://appshunter.io/developer/482926025) | [OPAS Software GmbH](https://appshunter.io/developer/1704978541) |

## What reviewers say

### e

[App page](https://appshunter.io/ios/app/e-boksdk/id482926022)

Securely access and manage all your digital mail from companies and public authorities in one place. Sign documents, pay bills, organize mail with a multi-level folder structure, and store important personal documents like an online bank vault.

**Highlights:** Secure digital mail access, Digital document signing with MitID, In-app bill payment, Multi-level folder organization, Mail management (swipe to read/archive), Store personal documents securely

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

**In-app purchases:** none

**What reviewers like**

- 👍 Useful app
- 👍 Makes life easier
- 👍 Works as it should
- 👍 Accessible

**What reviewers complain about**

- 🐛 Crashes after update
- 🐛 Login issues
- 🔍 Confusing navigation
- 🔍 Too many options
- 🔍 Suboptimal search function

**Reported bugs**

- Crashes after 5.4.0 update
- Login loop issue with multiple accounts
- Unable to log in with NemID

**Requested features**

- Dark mode option
- Biometric login (e.g., FaceID) support
- Simplified login process


### 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 e free?

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

### Is OPAS Calendar free?

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

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

e is rated higher. e averages 4.7 out of 5 from 1.6K ratings, while OPAS Calendar averages 1.7 from 7 ratings.

### Do e or OPAS Calendar have ads?

Neither e nor OPAS Calendar shows ads.

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

e ships an update every 3 weeks, and OPAS Calendar monthly. Most recently, e was updated on November 1, 2026 and OPAS Calendar on October 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.*