Comparison

Janus Lock vs Calendar Mirror

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • Unlock door remotely
  • Track unlock history
  • Create physical passcodes
  • Share and manage access
  • Hardware firmware updates
Features
Read full description

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!

About

Calendar Mirror

Features
Read full description

Some calendars you can see but cannot reshare. A subscribed work schedule. A read-only team feed. An account that is not yours. Calendar Mirror makes an editable copy of one calendar inside another calendar you own — one direction only, so the original is never touched. Because the copy lives in your own account, it reaches your other devices on its own. PICK TWO CALENDARS Choose the calendar to copy from and the one to copy into. Add as many pairs as you like; two can share a destination, and anything you add by hand is left alone. Repeating and all-day events, and moved occurrences, all come across. CHOOSE HOW MUCH CROSSES OVER Each pair decides: a full copy; titles and locations only; or "Busy" blocks that show your time and nothing else. Put a label in front of copied titles — "[Work] Standup", or "[Work] Busy" — and carry the meeting link into the copy's notes so a mirrored meeting is one you can join. CHOOSE WHICH EVENTS A pair can skip meetings you declined or have not answered, events the organizer canceled, all-day events and anything marked free, anything shorter or longer than you like, titles containing words you choose, and anything outside a window of the day on the weekdays you pick. Or tag one event at a time: #nomirror, #private, #public in its notes. IT TELLS YOU WHEN SOMETHING BREAKS A healthy pair is silent. If one stops syncing, an all-day warning appears in the destination calendar itself, and clears the moment the pair recovers. ON IPHONE AND IPAD Every pair in one list, with its health and event count. Pull down to sync now. Background refreshes run at the interval you choose, when iOS allows — treat it as the earliest a sync may start, not a guarantee. SEND TIMES "When are you free?" One tap gives you your next three free times as a line of text — "Tue 2–2:30pm, Wed 10–10:30am or Thu 3–3:30pm MDT" — worked out on your device from the calendars you chose, ready to paste into Messages, Mail or Slack. Also a Shortcuts action and a Siri phrase. Nothing leaves your device. ASKWHEN.ME — A SEPARATE PRODUCT YOU CAN TURN ON Off by default; until you turn it on, the app makes no network request of any kind. AskWhen.me is a subscription with its own server: a page at askwhen.me/yourpage where people can ask you for a time. A request page, not a booking page. Your device works out which times to offer and sends only those — never your calendar, your events, your address, or your name beyond the label you choose. Someone picks a time and says who they are; the request comes to your device, and nothing lands in your calendar until you accept. Your device re-checks the time against your real calendar first. Send times can carry a personal link: it opens your page once, for a week, and because you sent it there is no email confirmation — if the time is still clear, your device accepts it for you and they get the calendar file. Free for 90 days, then $19.99 a year; your own name on askwhen.me, or your own domain, are upgrades. Payment is Apple's. The privacy page says what the server holds, and for how long. WHAT IT DOES NOT DO • No scheduling links unless you turn on AskWhen.me, a separate subscription. • No unified calendar view — it makes copies; your calendar app shows them. • No team, admin or SSO features. It is a single-person utility. • Attendees are never copied: Apple's calendar framework cannot set guests. • It cannot sync a calendar your device cannot already see. PRIVACY No account. No analytics, no tracking, no telemetry, no ads. No server, and no network request, until you turn on AskWhen.me — and its server never sees your calendar either. Once a copy lands in iCloud, Google or Exchange, that provider stores it under their policies. Open source under the MIT licence. One purchase covers iPhone, iPad and Mac. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Janus Lock4 screens
Calendar Mirror4 screens

Verdict

The call

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) and chart position (#197 vs unranked). On 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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard5 real differences · 6 level
Janus Lock versus Calendar Mirror: the parameters behind the verdict, then further details
ParameterJanus LockCalendar Mirror
PriceFree — better$2.99
Rating2.3 (4 ratings) — better—
Positive reviews34.3% of reviews—
Number of ratings4 — better—
Update frequencyEvery 6 weeksEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
Best chart rank—#197 — better
DevicesiPhone, iPodiPhone, iPad, Mac — better
Requires iOS14 — better17.0
Further details — not scored
Size23 MB3 MB
Age rating4+4+
DeveloperHenis Electronic Technology Co., Ltd.Matthew Baylor

In-app purchases

None

Janus Lock

No in-app purchases

3 purchases

Calendar Mirror

Subscriptions3
  • AskWhen.me Request Page3 Months trial$19.991 Year
  • AskWhen.me Custom Subdomain$34.991 Year
  • AskWhen.me Custom Domain$69.991 Year

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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