# Janus Lock vs Calendar Mirror

The clearest difference is price: Janus Lock at Free against Calendar Mirror's $2.99. Janus Lock also leads on in-app purchases (none vs 3) and iOS requirement (14 vs 17.0). Calendar Mirror's advantage is update cadence (every 3 days vs every 6 weeks). On ads and device support there is nothing between them.

Janus Lock is free to download; Calendar Mirror costs $2.99 up front. Calendar Mirror sells 3 in-app purchases, starting at $19.99 per year. Janus Lock asks for nothing beyond the download.

Janus Lock ships an update every 6 weeks, Calendar Mirror every 3 days. The most recent releases landed on October 22, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Janus Lock | Calendar Mirror |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[2.3 (4 ratings)](https://appshunter.io/ios/app/janus-lock/id1441854153/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 34.3% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | Free | — |
| Size | 23 MB | 3 MB |
| Requires iOS | **14** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Henis Electronic Technology Co., Ltd.](https://appshunter.io/developer/1102336874) | [Matthew Baylor](https://appshunter.io/developer/6787358038) |

## What reviewers say

### Janus Lock

[App page](https://appshunter.io/ios/app/janus-lock/id1441854153)

Manage your smart door locks and access rights directly from your mobile device. Track who unlocks your door and when, and create physical passcodes for easy access. Share and manage keys with friends at a granular level.

**Highlights:** Unlock door remotely, Track unlock history, Create physical passcodes, Share and manage access, Hardware firmware updates

**Features:** macOS Compatibility

**In-app purchases:** none


### Calendar Mirror

[App page](https://appshunter.io/ios/app/calendar-mirror/id6787358036)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| AskWhen.me Request Page | $19.99 | per year |
| AskWhen.me Custom Subdomain | $34.99 | per year |
| AskWhen.me Custom Domain | $69.99 | per year |


## Frequently asked questions

### Is Janus Lock free?

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

### Is Calendar Mirror free?

Calendar Mirror costs $2.99, and also offers in-app purchases.

### Do Janus Lock or Calendar Mirror have ads?

Neither Janus Lock nor Calendar Mirror shows ads.

### Which is updated more often, Janus Lock or Calendar Mirror?

Janus Lock ships an update every 6 weeks, and Calendar Mirror every 3 days. Most recently, Janus Lock was updated on October 22, 2026 and Calendar Mirror on October 28, 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.*