Janus Lock vs Phon
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Janus Lock
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.
- Unlock door remotely
- Track unlock history
- Create physical passcodes
- Share and manage access
- Hardware firmware updates
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Janus Lock is the next-generation smart door lock system which enables you to manage your locks and access rights all on your mobile phone. Key features: - Unlock the door with this app, for sure! - History tracking: Who and when unlocks my lock?! - Create and manage the physical 4-key passcodes so you don't even need to pull out your phone. - Share any keys or passcodes to your friends and manage them in a granular level. - Support hardware firmware update to unlock more new features in the future!
Phon
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Phon is a sound level meter built like a measurement instrument, not a toy VU meter. MEASURE • Real-time dB SPL on an analog needle with a precise digital readout • A-weighting and Fast time constant, as defined in IEC 61672 • Session minimum, average and maximum • Per-model calibration for the built-in microphone, so readings mean something out of the box CALIBRATED EXTERNAL MICS Plug in a USB-C measurement microphone and Phon detects it instantly. Load the calibration file that came with your mic and Phon applies its measured frequency response and sensitivity to every reading. Built and tested with the Dayton Audio iMM-6C. Other USB-C measurement mics with an FRD-style calibration file should work too. PHON PRO — ONE-TIME PURCHASE • Calibration file loading for external mics • C and Z frequency weightings • Slow and Impulse time constants • Leq, the equivalent continuous level over the whole session • CSV export of the full session log, with timestamps, IEC 61672 column names and all calibration metadata Family Sharing supported. No subscription, ever.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Janus Lock | Phon |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (4 ratings) — better | — |
| Positive reviews | 34.3% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 6 weeks | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 14 — better | 17.0 |
| Further details — not scored | ||
| Size | 23 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Henis Electronic Technology Co., Ltd. | carlos prieto ortiz |
In-app purchases
Janus Lock
No in-app purchases
Phon
- Phon App$14.99









