# Janus Lock vs Phon

The clearest difference is in-app purchases: Janus Lock at none against Phon's 1. Janus Lock also leads on iOS requirement (14 vs 17.0). Phon's advantage is update cadence (every 3 days vs every 6 weeks). On price, ads and device support there is nothing between them.

Both are free to download. Phon sells 1 one-off in-app purchase. Janus Lock asks for nothing beyond the download.

Janus Lock ships an update every 6 weeks, Phon every 3 days. Both last shipped on October 29, 2026.

## The numbers

| Metric | Janus Lock | Phon |
| --- | --- | --- |
| Price | Free | Free |
| 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 | 1 MB |
| Requires iOS | **14** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Henis Electronic Technology Co., Ltd.](https://appshunter.io/developer/1102336874) | [carlos prieto ortiz](https://appshunter.io/developer/1889995023) |

## 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


### Phon

[App page](https://appshunter.io/ios/app/phon-calibrated-spl-meter/id6775261720)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Phon App | $14.99 | one-time |


## Frequently asked questions

### Is Janus Lock free?

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

### Is Phon free?

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

### Do Janus Lock or Phon have ads?

Neither Janus Lock nor Phon shows ads.

### Which is updated more often, Janus Lock or Phon?

Janus Lock ships an update every 6 weeks, and Phon every 3 days. Most recently, Janus Lock was updated on October 29, 2026 and Phon on October 29, 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.*