# DyConcept® HoloViewer vs Vertical Calendar

The clearest difference is in-app purchases: DyConcept® HoloViewer at none against Vertical Calendar's 2. DyConcept® HoloViewer also leads on ads (none vs shown) and iOS requirement (13.0 vs 15.1). Vertical Calendar's advantage is update cadence (weekly vs every 2 months). On price and device support there is nothing between them.

Both are free to download. Vertical Calendar sells 2 in-app purchases, starting at $1.99 per month. DyConcept® HoloViewer asks for nothing beyond the download.

DyConcept® HoloViewer ships an update every 2 months, Vertical Calendar weekly. The most recent releases landed on November 6, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | DyConcept® HoloViewer | Vertical Calendar |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (3 ratings)](https://appshunter.io/ios/app/vertical-calendar-planner/id6751930821/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 305 MB | 53 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kathrin Bertelmann](https://appshunter.io/developer/1455448435) | [naoki otsu](https://appshunter.io/developer/1082476153) |

## What reviewers say

### DyConcept® HoloViewer

[App page](https://appshunter.io/ios/app/dyconcept-holoviewer/id1455448766)

**Features:** macOS Compatibility

**In-app purchases:** none


### Vertical Calendar

[App page](https://appshunter.io/ios/app/vertical-calendar-planner/id6751930821)

Organize your life with a vertical monthly calendar and unlimited tabs. Easily create, color-code, and search for events. Enjoy offline access, automatic backups, and robust security features.

**Highlights:** Vertical monthly calendar view, One-tap appointment creation, Unlimited tab creation for organization, Color-coded event highlighting, Global event search functionality, Automatic backup and restore, Offline access and biometric authentication

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium | $1.99 | per month |
| Premium | $19.99 | per year |


## Frequently asked questions

### Is DyConcept® HoloViewer free?

DyConcept® HoloViewer is free to download, with no in-app purchases.

### Is Vertical Calendar free?

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

### Do DyConcept® HoloViewer or Vertical Calendar have ads?

Vertical Calendar shows ads; DyConcept® HoloViewer does not.

### Which is updated more often, DyConcept® HoloViewer or Vertical Calendar?

DyConcept® HoloViewer ships an update every 2 months, and Vertical Calendar weekly. Most recently, DyConcept® HoloViewer was updated on November 6, 2026 and Vertical Calendar on November 8, 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.*