12Calendar vs Flip Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
12Calendar
Customize your lock screen with a calendar. Choose from various layouts, fonts, and colors to display your schedule conveniently. Add custom holidays by importing from your device's calendar.
- Customizable calendar layouts
- Selectable fonts and colors
- Adjustable transparency and frame borders
- Add custom holiday data
- Import holidays from iOS calendar
- Display year, month, and day of the week
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Every time you open your lock screen, a beautiful calendar is right there to greet you. That's the everyday experience 12Calendar creates. Customize fonts, colors, and layouts to build a calendar wallpaper that's uniquely yours — simply and easily. ■ Layouts Choose from 28 calendar layouts. Free Layout mode lets you drag and resize each calendar freely. - You can change the size from the popup that appears when you tap the calendar. ■ Customize Every Detail - Individual color settings for weekdays, Saturdays, and Sundays - Day-of-week display language - 12 fonts with adjustable text size - Background opacity and border visibility - Week start day (Sunday or Monday) ■ Holiday Support Add holidays manually within the app. With an in-app purchase, holidays can be imported from your iOS Calendar. ■ How to Set Your Wallpaper After saving your calendar, set it as your wallpaper via the Photos app or iOS Settings. (Wallpaper cannot be changed directly from within this app.) ※ App Store screenshots were created using Screenshots.pro.
Flip Clock
This app provides a classic digital clock widget for your device's home, lock, and standby screens. It offers features like displaying seconds, a calendar, customizable themes, and various timekeeping tools including alarms, timers, and stopwatches. It can also function as a screensaver when charging.
- Display seconds on multiple screens
- Full screen time and date
- Smart alarm clock
- Timer and stopwatch
- Countdown to target dates
- Pomodoro Technique timer
- Customizable widget signatures
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Transform your iPhone and iPad into a stylish, functional retro flip clock. Whether you need a sleek desk clock for your workspace, a soothing nightstand clock, or a personalized focus timer, Flip Clock brings classic minimalism and personal flair to your everyday workflow. Perfect for StandBy mode, Lock Screen widgets, and full-screen focus sessions. ◆ Aesthetic Clock and StandBy Mode - Full-Screen Flip Clock: Vintage flip animation with customizable themes. - OLED Burn-In Protection: Built-in pixel shifting technology protects your screen during long always-on sessions. - Show Seconds Everywhere: Real-time seconds display on Home Screen, Lock Screen, Dynamic Island, and StandBy mode. - Smart Auto-Launch: Automatically turns into a screensaver when charging. - 12/24 Hour Formats: Toggle easily with flexible date and calendar displays. ◆ Custom Signatures and Aesthetic Widgets - Personal Signatures Anywhere: Add custom text, mottoes, or signatures directly in the app and on your Lock Screen and Home Screen widgets. - Aesthetic Widgets: Beautiful, customizable widgets featuring clock, calendar, and your personal text. - Multiple Clock Themes: Personalize colors, fonts, and styles for any desk setup. ◆ Focus, Timers and Productivity Tools - Count-up and Countdown Timers: Flexible stopwatch count-up timers and precise countdown timers for workouts, study sessions, and daily tasks. - Pomodoro Technique: Stay in the flow zone with integrated study and work interval timers. - Floating Stopwatch: Keep a live floating timer widget over other apps. - Event Countdown: Track big upcoming moments like New Year's, exams, birthdays, and holidays. - White Noise Player: Soothing background sounds to boost concentration or help you sleep. ◆ Smart Alarms and Online Music Ringtones - Rich Online Music Library: Choose from a wide selection of online music tracks, ambient sounds, and ringtones to wake up your way. - Smart Volume Control: Alarms that gently wake you up by automatically adjusting volume gradually. - Hourly Chime: Friendly voice/sound timekeeping on the hour. Upgrade your desk setup and daily routine today with Flip Clock!
Screenshots
Verdict
The clearest difference is rating: Flip Clock at 4.6 against 12Calendar's 3.2. Flip Clock also leads on ratings volume (71K vs 11) and update cadence (monthly vs every 3 months). 12Calendar's advantage is ads (none vs shown). On price, in-app purchases and monetization model 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. 12Calendar sells 4 one-off in-app purchases and Flip Clock sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
Flip Clock holds the better App Store score, 4.6 against 3.2. That said, the two scores are not equally well evidenced: Flip Clock has 71K ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 62% of 12Calendar's written reviews are positive against 72% of Flip Clock's.
12Calendar ships an update every 3 months, Flip Clock monthly. The most recent releases landed on November 1, 2026 and November 10, 2026 respectively.
| Parameter | 12Calendar | Flip Clock |
|---|---|---|
| Price | Free | Free |
| Rating | 3.2 (11 ratings) | 4.6 (71K ratings) — better |
| Positive reviews | 61.5% of reviews | 72.4% of reviews — better |
| Number of ratings | 11 | 71K — better |
| Update frequency | Every 3 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad, iPod, Mac — better |
| Requires iOS | 17.0 | 15.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 80 MB |
| Age rating | 4+ | 4+ |
| Developer | lagoon | 翠玲 施 |
Customer experience
12Calendar
Flip Clock
Bugs and requests
12Calendar
Not enough reviews yet to summarise bugs or requests.
Flip Clock
Reported bugs
4 issues- Clock freezing or not updating correctly
- Alarm issues (not triggering, unable to disable)
- Inconsistent behavior across devices and OS versions
- Unlock/restore purchase bugs
Requested features
5 requests- More clock face and color options
- Automatic dark/light mode switching
- Ability to set clock as device wallpaper
- Improved alarm functionality and customization
- Seamless integration with other devices
In-app purchases
12Calendar
- UpgradeFree
- Hide Logo & SAVE available$0.99
- Enable load calendar$0.99
Show 1 moreShow fewer
- Clear all functional limitation$1.99
Flip Clock
- Digital Clock 2$0.99
- Digital Clock 3$0.99
- Digital Clock 4$0.99
Show 7 moreShow fewer
- Digital Clock 5$0.99
- Digital Clock 6$0.99
- Simulated Desk Fan 1$0.99
- Remove Ads$0.99
- More clock skins$0.99
- Flip Clock Professional Edition$2.99
- Unlock All Screensavers$9.99
Questions
Is 12Calendar free?
Is Flip Clock free?
Which has better reviews, 12Calendar or Flip Clock?
Do 12Calendar or Flip Clock have ads?
Which is updated more often, 12Calendar or Flip Clock?
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