# Big Clock vs SFClock

The clearest difference is rating: SFClock at 4.5 against Big Clock's 3.3. SFClock also leads on in-app purchases (none vs 3) and ads (none vs shown). On price, ratings volume, update cadence and device support there is nothing between them.

Both are free to download. Big Clock sells 3 in-app purchases, starting at $4.99 per 7 days. SFClock asks for nothing beyond the download.

SFClock holds the better App Store score, 4.5 against 3.3. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 0% of Big Clock's written reviews are positive against 33% of SFClock's.

Big Clock ships an update every 3 months, SFClock every 5 months. The most recent releases landed on September 16, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Big Clock | SFClock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/big-clock-digital-display/id1553856417/reviews) | **[4.5 (4 ratings)](https://appshunter.io/ios/app/sfclock/id1627863783/reviews)** |
| Number of ratings | 3 | **4** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 5 months |
| Monetization | Ad-supported | **Free** |
| Size | 66 MB | 0 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Kevin Ghori](https://appshunter.io/developer/1639082610) | [Yafei Dong](https://appshunter.io/developer/1562436731) |

## What reviewers say

### Big Clock

[App page](https://appshunter.io/ios/app/big-clock-digital-display/id1553856417)

This utility app displays the current day, time, and date in a large, full-screen digital format. It offers customization options for clock digit color and includes integrated alarm, timer, and stopwatch functionalities with advanced settings like repetition and lap tracking.

**Highlights:** Full-screen digital clock display, Customizable digit colors, Multiple alarm settings, Countdown timer, Stopwatch with lap feature, Display day and date

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Big Digital Clock Weekly Plan | $4.99 | per 7 days |
| Big Digital Clock Monthly Plan | $9.99 | per month |
| Big Digital Clock Yearly Plan | $49.99 | per year |


### SFClock

[App page](https://appshunter.io/ios/app/sfclock/id1627863783)

This utility app displays a flip clock and calendar. It offers customizable clock settings like 12/24 hour format and seconds display. Users can navigate the calendar and choose from various light and dark color themes.

**Highlights:** Flip clock display, Calendar view, 12/24 hour format, Seconds display toggle, Calendar month navigation, Color themes, Light/dark mode

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Big Clock free?

Big Clock is free to download, with in-app purchases available.

### Is SFClock free?

SFClock is free to download, with no in-app purchases.

### Which has better reviews, Big Clock or SFClock?

SFClock is rated higher. Big Clock averages 3.3 out of 5 from 3 ratings, while SFClock averages 4.5 from 4 ratings.

### Do Big Clock or SFClock have ads?

Big Clock shows ads; SFClock does not.

### Which is updated more often, Big Clock or SFClock?

Big Clock ships an update every 3 months, and SFClock every 5 months. Most recently, Big Clock was updated on September 16, 2026 and SFClock on September 14, 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.*