Flip Clock vs Bosai
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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!
Bosai
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"This home can last 4.5 more days." — Bosai shows your household's survival days at a glance, then helps you extend them, one small step at a time. It turns Japan's everyday preparedness know-how — household-based stockpile calculation and the "rolling stock" method — into a daily routine for ordinary families. WHAT BOSAI SOLVES ◆ "I don't know what to stockpile, or how much." Most emergency checklists are one-size-fits-all — "3 days per person" and little more. Bosai calculates the required amounts of about 70 items — water, food, toilet supplies, daily essentials — personalized to your family's size, ages, and home type. ◆ "My supplies always expire and go to waste." An expiry alert alone still ends with food in the trash. Bosai builds the whole rolling-stock cycle into the app: expiry approaching → use it in a regular meal → restock on your next grocery run. Stockpiling becomes part of everyday shopping, not a special event. ◆ "Prepper apps feel like they're made for someone else." No bunkers, no survivalist gear lists. Bosai follows the Japanese approach — prepare as an extension of daily life, with items from your ordinary supermarket. It's designed for regular families. ◆ "What if the network is down when disaster strikes?" Every feature works fully offline. All articles are stored on your device. During a blackout or with no signal, Bosai just opens and works. AT THE CENTER: YOUR SURVIVAL DAYS The home screen shows in one big number how many days your family could get by on what you have now. The target adapts to your region (e.g., 2 weeks for the U.S. West Coast), and Bosai suggests exactly one "next move" to raise your score — so you never face an overwhelming to-do list. KEY FEATURES • Automatic needs calculation from your household profile (about 70 items) • Cycle: expiry notifications plus a restock list • Go-bag checklist with a twice-a-year inspection reminder • Family emergency memo (evacuation sites, meeting points, contacts) • Learn: 15 original articles on Japan's practical know-how — the disaster toilet problem, sheltering at home, securing furniture, and more • Presets for 10 regions, including the U.S. West Coast, Japan, Taiwan, Indonesia, the Philippines, Turkey, Latin America, and Brazil HOW BOSAI IS DIFFERENT • Personalized calculation from your household — not a one-size-fits-all list • A use-and-restock cycle — not just an inventory with expiry alerts • Built for ordinary families, not survivalists • Works fully offline; no account, no ads. Your data stays on your device (and in your own iCloud if you share with family) — never on external servers BOSAI PREMIUM (FAMILY SHARING) One subscription covers the whole family: invite members and share and edit your stockpile list together via iCloud. Monthly and yearly plans. All core features are free. AVAILABLE IN 9 LANGUAGES Japanese, English, Traditional Chinese, Simplified Chinese, Indonesian, Filipino, Turkish, Spanish, and Portuguese. Preparedness isn't a one-time effort — it's a habit. Bosai helps you take the first step and keep going. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: Bosai at none against Flip Clock's shown. Flip Clock's advantage is device support (4 vs 1) and iOS requirement (15.0 vs 17.0). On price, update cadence and in-app purchases 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. Flip Clock sells 10 one-off in-app purchases and Bosai sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.
Flip Clock ships an update monthly, Bosai every 3 weeks. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.
| Parameter | Flip Clock | Bosai |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (71K ratings) — better | — |
| Positive reviews | 72.4% of reviews | — |
| Number of ratings | 71K — better | — |
| Update frequency | Monthly | Every 3 weeks — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 80 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | 翠玲 施 | SUGURU KASEBE |
Bugs and 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
Bosai
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Flip Clock
- Digital Clock 2$0.99
- Digital Clock 3$0.99
- Digital Clock 4$0.99
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- 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
Bosai
- Monthly Plan$2.991 Month
- Yearly Plan$29.991 Year







