Comparison

SFClock vs Digital Clock Ultra

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SFClock

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
Read full description

SFClock is a simple flip clock and calendar App. Flip clock and calendar are displayed in portrait, and only clock in landscape. You can change 12/24 hours and seconds display of clock. You also can move month in calendar with the arrows, and back to current month by tapping the month title. There are many color themes, and you can choose a light or dark one to use.

About

Digital Clock Ultra

Customize your device's clock with personalized backgrounds, calendar integration, and a year progress tracker. Enjoy a sleek, easy-to-navigate interface for a unique time-keeping experience.

Highlights
  • Customizable digital clock display
  • 12/24 hour format
  • Built-in calendar with date marking
  • Year progress percentage tracker
  • Personalized photo backgrounds
  • Sleek and modern UI
Read full description

Transform your clock with Digital Clock Ultra! Personalize with photos, calendar, year progress tracker, and sleek design. Download now! Digital Clock Ultra is an app that provides a comprehensive time-keeping experience for users. The app includes a digital clock display that can be set to either a 12-hour or 24-hour format. The clock is displayed in large, easy-to-read digits that can be seen from a distance. In addition to the clock, Digital Clock Ultra also includes a built-in calendar that shows the current month and marks today's date with a red dot. Plus Digital Clock Ultra show Year Progress. Year Progress is a feature in Digital Clock Ultra that displays the current year's progress as a percentage. The app calculates the number of days that have passed since January 1st and displays it as a percentage, giving users a visual representation of how much of the year has already elapsed. One of the unique features of Digital Clock Ultra is the ability to set your own photos as background images. Users can choose from their own photo library or use default image. The app automatically adjusts the photo to fit the screen and adds a transparent clock overlay on top. This feature allows users to personalize the app and make it truly their own. Digital Clock Ultra is designed with a sleek and modern user interface that is easy to navigate. All the features are easily accessible from the main screen, making it easy to switch between the clock, calendar, and settings. Overall, Digital Clock Ultra is a great app for anyone who wants a customizable clock and a basic calendar experience. With its digital clock display, built-in calendar, and the ability to set your own photos as background images, this app is perfect for keeping track of time and adding a personal touch to your device.

Screenshots

SFClock4 screens
Digital Clock Ultra4 screens

Verdict

The call

The clearest difference is review sentiment: Digital Clock Ultra at 100% against SFClock's 33%. Digital Clock Ultra also leads on rating (5.0 vs 4.5) and update cadence (every 3 weeks vs every 5 months). On price, ratings volume, ads 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Digital Clock Ultra holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 4 and 4 respectively. Written reviews point the same way: 33% of SFClock's written reviews are positive against 100% of Digital Clock Ultra's.

UpkeepUpdate frequency

SFClock ships an update every 5 months, Digital Clock Ultra every 3 weeks. The most recent releases landed on September 14, 2026 and September 20, 2026 respectively.

Scorecard3 real differences · 7 level
SFClock versus Digital Clock Ultra: the parameters behind the verdict, then further details
ParameterSFClockDigital Clock Ultra
PriceFreeFree
Rating4.5 (4 ratings)5.0 (4 ratings) — better
Positive reviews33.3% of reviews100.0% of reviews — better
Number of ratings44
Update frequencyEvery 5 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPad, Vision ProiPhone, iPad, Mac
Requires iOS17.017.0
Further details — not scored
Size0 MB42 MB
Age rating4+4+
DeveloperYafei DongSeungJun Lee

Customer experience

SFClock

All ratings4 ratings
Positive75.0%
Neutral25.0%
Negative0.0%
Written reviews3 reviews
Positive33.3%
Neutral66.7%
Negative0.0%

Digital Clock Ultra

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SFClock

No in-app purchases

None

Digital Clock Ultra

No in-app purchases

Questions

Is SFClock free?
SFClock is free to download, with no in-app purchases.
Is Digital Clock Ultra free?
Digital Clock Ultra is free to download, with no in-app purchases.
Which has better reviews, SFClock or Digital Clock Ultra?
Digital Clock Ultra is rated higher. SFClock averages 4.5 out of 5 from 4 ratings, while Digital Clock Ultra averages 5.0 from 4 ratings.
Do SFClock or Digital Clock Ultra have ads?
Neither SFClock nor Digital Clock Ultra shows ads.
Which is updated more often, SFClock or Digital Clock Ultra?
SFClock ships an update every 5 months, and Digital Clock Ultra every 3 weeks. Most recently, SFClock was updated on September 14, 2026 and Digital Clock Ultra on September 20, 2026.

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