Qrio Lock vs Mikan Days
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Qrio Lock
This smart lock offers hands-free unlocking by automatically detecting your approach. It also features auto-locking when the door is closed and allows for easy key sharing with family and friends. Remote operation and notifications are available with an optional hub.
- Hands-free unlocking
- Auto lock
- Easy key sharing
- No installation required
- Remote operation with hub
- Notifications
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※ Available on iOS 14.0 or later. ※ Using Apple Watch requires watchOS 8.0 or later. ※ Please note that Qrio Smart Lock (Q-SL1) account can not be used. ◇ Hands-free unlocking There is no need to take out your smartphone. Just approach the door, Qrio Lock automatically unlock the key. ◇ Auto lock If you forget to lock the key when you go out, the new auto lock will be locked the door by detected the door has been closed. ◇ Support various doors and installation construction is unnecessary We are pursuing a design that fits to various door locks for the living environment in Japan. There is no need for key replacement or drilling. It can be installed safely in a rental house too. ◇ More freedom in the key-free lifestyle. Qrio Lock is family-friendly Qrio Lock is very convenient because you can create a key and share it easily with your family or acquaintances. With Qrio Lock, you can use it to suit your lifestyle. ◇ Security with remote operation and notification function By linking with Qrio Hub, you can operate Qrio Lock and receive notifications on your smartphone on the go. ※ "Hands-free unlocking" may consume the battery of the smartphone than usual because it uses GPS in the background.
Mikan Days
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Mikan Days is a calm, visual countdown app with a date calculator built in. Keep every date that matters in one list: count down to a trip, count up from an anniversary, or follow an exam week from its first day to its last. Pin the ones you care about most as cards on top, the year too, and archive the ones you’re done with. When you need date math, the calculators are one tab away, and any result can become a countdown. Free, with no account, no ads and no tracking. Works on iPhone, iPad, iPhone Duo and Apple Watch, with Home Screen and Lock Screen widgets included. Features: - Count down to a date, count up from one, or follow a period day by day - Import upcoming events from Calendar in one go: birthdays repeat, trips become periods - Repeat a countdown daily, weekly, monthly or yearly, or every few days, weeks, months or years - Pin countdowns as cards on top, filter by Upcoming, Since or Periods, and archive the rest - Show a countdown in days, weeks, months or hours - Give a countdown a time and a time zone, and be reminded at the time or an hour before - Add checkpoints like “Pack, 2 days before” that move with the day - See round numbers coming up on a count up: Day 100, Day 1,000, each anniversary - Keep Last Done countdowns for things you repeat, with a Done circle, a due date and a history - Write memories with a photo on any countdown - Give each countdown a look (Heatmap, Pellet Run, Zen Garden, Tear-Off Almanac, Ensō, Vinyl, Mikan Peel, Orbit, Tally Marks or Jack-o’-Lantern) drawn over its own days, a photo, a place and a note - Five print-style looks from Japan and Taiwan, drawn in dots and type: Torii at Dusk, Sakura Branch, Taipei Night, Jiufen Lanterns and Pearl Tea - Switch the Countdowns tab to Night Tiles: dark tiles, pinned countdowns in a grid and photos to the screen’s edges - Pull Countdowns down a long way, or tap the Today line, to open today’s Tear-Off Almanac page - Shake your iPhone on the Tear-Off Almanac to draw the day’s fortune (in English, Chinese and Japanese) - For Japan: count down to the next holiday, long weekend, New Year break or Golden Week, see each day’s 六曜 and lucky days (一粒万倍日, 天赦日, 寅の日) when picking a date, and show years in 令和 - Count the days between a selected date and today - Measure the span between any two dates - Add or subtract days, weeks, months, or years - Track year progress with multiple visual themes, and open the Tear-Off Almanac, Zen Garden, Tally Marks, Season Scroll or Ensō full screen to tear, rake, write, unroll or brush a little each day - Save calculation history, and turn any result into a countdown - Follow a trip or exam week from “Starts in 7 days” to “Day 3 of 7” to “Completed” - Set up to five reminders per countdown, each at its own time, from the day itself to a month before - Back up everything to one file and restore it any time - Add Home Screen widgets for saved calculations, countdowns, and year progress, including one that shows a single countdown beside its look and photo - Keep a countdown or the year on your Lock Screen - Keep your countdowns on Apple Watch, with complications for the next one, one you choose, or the year, and add new ones from your wrist - On iPad and iPhone Duo too: your list and a countdown side by side - Start a countdown from the Action Button, Control Center, Siri, Spotlight or a long press on the app icon - Share any countdown or your year so far as an image Mikan Days requires no account and includes no advertising or tracking. Your countdowns, calculations, history, and preferences remain on your device.
Screenshots
Verdict
The clearest difference is update cadence: Mikan Days at every 2 weeks against Qrio Lock's every 6 weeks. Qrio Lock's advantage is iOS requirement (14.0 vs 17.0). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Qrio Lock ships an update every 6 weeks, Mikan Days every 2 weeks. The most recent releases landed on November 11, 2026 and November 10, 2026 respectively.
| Parameter | Qrio Lock | Mikan Days |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) — better | — |
| Positive reviews | 12.7% of reviews | — |
| Number of ratings | 3 — better | — |
| Update frequency | Every 6 weeks | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, Apple Watch |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 104 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Sony Network Communications Inc. | Shojum |
In-app purchases
Qrio Lock
No in-app purchases
Mikan Days
No in-app purchases









