# CAS Vikar Booking vs LetDialog

The clearest difference is update cadence: LetDialog at weekly against CAS Vikar Booking's every 2 months. CAS Vikar Booking's advantage is iOS requirement (11.0 vs 16.4). On price, ads, in-app purchases and device support there is nothing between them.

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

CAS Vikar Booking ships an update every 2 months, LetDialog weekly. The most recent releases landed on September 20, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | CAS Vikar Booking | LetDialog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 16 MB | 44 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [CAS A/S](https://appshunter.io/developer/1116041140) | [FirstAgenda A/S](https://appshunter.io/developer/1215633829) |

## What reviewers say

### CAS Vikar Booking

[App page](https://appshunter.io/ios/app/cas-vikar-booking/id1116042011)

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

**In-app purchases:** none


### LetDialog

[App page](https://appshunter.io/ios/app/letdialog/id1669285665)

**In-app purchases:** none


## Frequently asked questions

### Is CAS Vikar Booking free?

CAS Vikar Booking is free to download, with no in-app purchases.

### Is LetDialog free?

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

### Do CAS Vikar Booking or LetDialog have ads?

Neither CAS Vikar Booking nor LetDialog shows ads.

### Which is updated more often, CAS Vikar Booking or LetDialog?

CAS Vikar Booking ships an update every 2 months, and LetDialog weekly. Most recently, CAS Vikar Booking was updated on September 20, 2026 and LetDialog on September 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.*