# Flip clock vs big O'Clock

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.

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.

## The numbers

| Metric | Flip clock | big O'Clock |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.5 (4.9K ratings)](https://appshunter.io/ios/app/flip-clock-no-ads/id1522242289/reviews)** | [4.5 (11 ratings)](https://appshunter.io/ios/app/big-oclock/id1524090504/reviews) |
| Number of ratings | **4.9K** | 11 |
| Positive reviews | 58.8% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 12 months |
| Monetization | Subscription | **Paid** |
| Size | 64 MB | 31 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Free Calculator Technology Co., Ltd.](https://appshunter.io/developer/1457813265) | [john bogaert](https://appshunter.io/developer/1524090506) |

## What reviewers say

### Flip clock

[App page](https://appshunter.io/ios/app/flip-clock-no-ads/id1522242289)

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.

**Highlights:** Page-turning digital clock animation, 123 White Noise Sounds, Customizable skins and colors, Hourly chime and timer functions, Charging animation, Widget support

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Clock — annual subscription | $5.49 | per year |
| Permanent purchase | $3.99 | one-time |

**What reviewers like**

- 👍 Simple and straightforward
- 🌟 Customizable clock design
- 💤 Helpful for sleep and focus
- 🕰️ Useful as a desk clock

**What reviewers complain about**

- 💰 Most features require a subscription
- 🔒 Limited functionality without paying
- 🐛 Occasional bugs and syncing issues
- 🕰️ Clock not always accurate

**Reported bugs**

- Widget freezes or stops updating
- Time display not syncing correctly
- Subscription issues and lost purchases

**Requested features**

- Add alarm clock functionality
- Allow customization of widget
- Improve dark mode/night settings
- Introduce more free features


### big O'Clock

[App page](https://appshunter.io/ios/app/big-oclock/id1524090504)

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.

**Highlights:** Full-screen display, Large, clear digits, Customizable sounds and vibrations, Timer functionality, Stopwatch functionality, Nightstand mode

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| I Love Big O'Clock | $1.99 | one-time |
| I Deeply Love Big O'Clock | $3.99 | one-time |
| I Adore Big O'Clock | $6.99 | one-time |


## Frequently asked questions

### Is Flip clock free?

Flip clock is free to download, with in-app purchases available.

### Is big O'Clock free?

big O'Clock costs $0.99, and also offers in-app purchases.

### Which has better reviews, Flip clock or big O'Clock?

Flip clock is rated higher. Flip clock averages 4.5 out of 5 from 4.9K ratings, while big O'Clock averages 4.5 from 11 ratings.

### Do Flip clock or big O'Clock have ads?

Neither Flip clock nor big O'Clock shows ads.

### Which is updated more often, Flip clock or big O'Clock?

Flip clock ships an update every 3 weeks, and big O'Clock every 12 months. Most recently, Flip clock was updated on November 6, 2026 and big O'Clock on November 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*