# Smart Flip Clock vs Bubble Calm

The clearest difference is price: Bubble Calm at Free against Smart Flip Clock's $0.99. Bubble Calm also leads on update cadence (daily vs every 3 weeks). Smart Flip Clock's advantage is in-app purchases (none vs 1) and iOS requirement (14.0 vs 18.6). On ads and device support there is nothing between them.

Bubble Calm is free to download; Smart Flip Clock costs $0.99 up front. Bubble Calm sells 1 one-off in-app purchase. Smart Flip Clock asks for nothing beyond the download.

Smart Flip Clock ships an update every 3 weeks, Bubble Calm daily. The most recent releases landed on September 27, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Smart Flip Clock | Bubble Calm |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.9 (19 ratings)](https://appshunter.io/ios/app/smart-flip-clock/id6737960507/reviews)** | — |
| Number of ratings | **19** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Daily** |
| Monetization | Paid | — |
| Size | 1 MB | 10 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [泳诗 陈](https://appshunter.io/developer/1548283802) | [picturing bits](https://appshunter.io/developer/1799046832) |

## What reviewers say

### Smart Flip Clock

[App page](https://appshunter.io/ios/app/smart-flip-clock/id6737960507)

A full-screen digital clock featuring a minimalist page-flipping animation for time display. It's designed for easy viewing from any angle and can aid in focused study, reading, and work sessions.

**Highlights:** Full-screen clock display, Page-flipping animation, Minimalist and practical design, Assists in focused study and work, Easy time viewing from any angle

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

**In-app purchases:** none


### Bubble Calm

[App page](https://appshunter.io/ios/app/bubble-calm/id6757302485)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Bubble Calm Plus | $1.99 | one-time |


## Frequently asked questions

### Is Smart Flip Clock free?

Smart Flip Clock costs $0.99, with no in-app purchases.

### Is Bubble Calm free?

Bubble Calm is free to download, with in-app purchases available.

### Do Smart Flip Clock or Bubble Calm have ads?

Neither Smart Flip Clock nor Bubble Calm shows ads.

### Which is updated more often, Smart Flip Clock or Bubble Calm?

Smart Flip Clock ships an update every 3 weeks, and Bubble Calm daily. Most recently, Smart Flip Clock was updated on September 27, 2026 and Bubble Calm on September 18, 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.*