Flip clock vs big O'Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flip clock
A digital clock app featuring a unique page-turning animation and customizable backgrounds. It includes white noise sounds, hourly chimes, and a timer for enhanced functionality. Personalize your display with various skins, colors, and animations.
- Page-turning digital clock animation
- 123 White Noise Sounds
- Customizable skins and colors
- Hourly chime and timer functions
- Charging animation
- Widget support
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Digital clock with page turning 1，23 White Noise Sounds 2，4 Flip Effects 3，4 Flip Sound Effects 4，11 Skins 5，Hourly Chime 6，Timer 7，Count Down 8，Widget 9，Customize Background 10，Customize Color 11，White Noise auto turn off 12，Daily Quote 13，Charging Animation 14，Show date/hide date 15，12 hours/24 hours 16，Display second hand/hide second hand 17，Turn on the sound/mute 18，Supports iPad and iPhone 19，Supports landscape and portrait SUBSCRIPTION PRICING AND TERMS This App can renew subscription automatically to help you unlock all content and features. Prices may vary from country to country and actual charges may be converted to your local currency based on the country of residence. Payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user’s Account Settings after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. Read more about our terms and conditions here: Terms of service: https://shimo.im/docs/HdVYWPcryCcjvrgc/ Privacy policy: https://shimo.im/docs/HdVYWPcryCcjvrgc/ Email：From2019219@gmail.com
big O'Clock
A full-screen clock, timer, and stopwatch app featuring large, clear digits. It offers high-quality visuals, sounds, and vibrations, serving as a stylish nightstand or work clock.
- Full-screen display
- Large, clear digits
- Customizable sounds and vibrations
- Timer functionality
- Stopwatch functionality
- Nightstand mode
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Big O'Clock is a clock, timer or stop watch with big digits in full screen with high quality images, sounds and vibrations Beautiful night stand or working clock
Screenshots
Verdict
The clearest difference is price: Flip clock at Free against big O'Clock's $0.99. Flip clock also leads on update cadence (every 3 weeks vs every 12 months) and ratings volume (4.9K vs 11). On rating, 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
Flip clock is free to download; big O'Clock costs $0.99 up front. Flip clock sells 2 in-app purchases, starting at $5.49 per year and big O'Clock sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.5 for Flip clock against 4.5 for big O'Clock. That said, the two scores are not equally well evidenced: Flip clock has 4.9K ratings behind it against 11, so its average is the more settled of the two.
Flip clock ships an update every 3 weeks, big O'Clock every 12 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | Flip clock | big O'Clock |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 4.5 (4.9K ratings) — better | 4.5 (11 ratings) |
| Positive reviews | 58.8% of reviews | — |
| Number of ratings | 4.9K — better | 11 |
| Update frequency | Every 3 weeks — better | Every 12 months |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Subscription | Paid — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 64 MB | 31 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing Free Calculator Technology Co., Ltd. | john bogaert |
Customer experience
Flip clock
big O'Clock
Bugs and requests
Flip clock
Reported bugs
3 issues- Widget freezes or stops updating
- Time display not syncing correctly
- Subscription issues and lost purchases
Requested features
4 requests- Add alarm clock functionality
- Allow customization of widget
- Improve dark mode/night settings
- Introduce more free features
big O'Clock
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Flip clock
- Clock — annual subscription$5.491 Year
- Permanent purchase$3.99
big O'Clock
- I Love Big O'Clock$1.99
- I Deeply Love Big O'Clock$3.99
- I Adore Big O'Clock$6.99
Questions
Is Flip clock free?
Is big O'Clock free?
Which has better reviews, Flip clock or big O'Clock?
Do Flip clock or big O'Clock have ads?
Which is updated more often, Flip clock or big O'Clock?
Other comparisons
