# Calvis vs Watch Authentication

The clearest difference is in-app purchases: Calvis at none against Watch Authentication's 3. Calvis also leads on update cadence (weekly vs monthly). Watch Authentication's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.2). On price and ads there is nothing between them.

Both are free to download. Watch Authentication sells 3 one-off in-app purchases. Calvis asks for nothing beyond the download.

Calvis ships an update weekly, Watch Authentication monthly. The most recent releases landed on October 11, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Calvis | Watch Authentication |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (13 ratings)](https://appshunter.io/ios/app/calvis/id6502692141/reviews)** | — |
| Number of ratings | **13** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Monthly |
| Monetization | Free | — |
| Size | 48 MB | 39 MB |
| Requires iOS | 17.2 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Calvis](https://appshunter.io/developer/1746469324) | [Karoly Losonc](https://appshunter.io/developer/1244701032) |

## What reviewers say

### Calvis

[App page](https://appshunter.io/ios/app/calvis/id6502692141)

Easily book and manage security services. For security personnel, this platform simplifies shift pickup and ensures prompt payment.

**Highlights:** Book security services, Manage security bookings, Pick up security shifts, Seamless payment for guards, Future of security management

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

**In-app purchases:** none


### Watch Authentication

[App page](https://appshunter.io/ios/app/watch-authentication/id6768117361)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Report pack 1 | $2.99 | one-time |
| Report pack 5 | $7.99 | one-time |
| Report pack 15 | $14.99 | one-time |


## Frequently asked questions

### Is Calvis free?

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

### Is Watch Authentication free?

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

### Do Calvis or Watch Authentication have ads?

Neither Calvis nor Watch Authentication shows ads.

### Which is updated more often, Calvis or Watch Authentication?

Calvis ships an update weekly, and Watch Authentication monthly. Most recently, Calvis was updated on October 11, 2026 and Watch Authentication on October 7, 2026.

---

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