Comparison

Big Red Clock vs allTimeCalc

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

Head to head
About

Big Red Clock

This app provides a large, easily readable digital clock with both 12-hour and 24-hour formats. It also includes a countdown timer and a stopwatch function for various timekeeping needs.

Highlights
  • Large digital clock display
  • 12-hour and 24-hour formats
  • Countdown timer
  • Stopwatch functionality
  • Red color theme
Features
Read full description

The perfect BIG NUMBER digital clock ...and red is just the beginning! Features: 12 hour or 24 hour Clock / Timer / Stopwatch Premium features (with subscription): Time Zone Assistant / Learn 24 Hour Time / Learn 12 Hour Time / Multi-Timer / Multi-Stopwatch Delightful set of colors and fonts to choose from Big Red Clock uses the standard Apple Terms of Use End User License Agreement (EULA): http://www.apple.com/legal/itunes/appstore/dev/stdeula

About

allTimeCalc

Features
Read full description

This is an App with everything about Time. Make calculations with hours, minutes and seconds, and convert the results obtained to different units of time. Want to know how much time passed between two chosen dates? With allTimeCalc it's easy. Just enter the dates you want... Add or subtract a year, a month, or any other unit of time, and get the end date and corresponding day of the week. With allTimeCalc you can have two timers working at the same time, and save your most used timers. Using allTimeCalc, always know how long it takes to reach your favorite destinations, whether you're walking, driving or taking the bus. Accessing the Time Calc tab, you can perform basic operations with hours, minutes and seconds, or convert, for example, 5000 seconds to hours or minutes, simply by entering the time you want to convert and pressing the Convert key. On the Date Calc tab you can set a start date and time and an end date and time, and know how many days pass between those dates. By pressing the More Results button, you have the corresponding time in Years, Months, Weeks, Days, Hours, Minutes and Seconds. The Day Calc tab allows you to add a time unit to a chosen date and time, obtaining an end date and the corresponding day of the week. As previously mentioned, the Timer tab allows the use of two timers at the same time. You can save your favorite timers for later use. When a timer runs out, you receive a ringtone and notification on your device. If you're using an Apple Watch, the notification will appear on it. In the ETA tab you have the estimated times of arrival to your favorite destinations, and previously chosen. Simply enter an address, or tap the screen at the chosen location, set a preferred mode of transport, and name the location. So you always know how long it takes to get to your destination, what time you'll get there, and how far away. The app allows you to directly access Maps and see the itinerary for the chosen destination.

Screenshots

Big Red Clock4 screens
allTimeCalc4 screens

Verdict

The call

The clearest difference is price: Big Red Clock at Free against allTimeCalc's $2.99. Big Red Clock also leads on update cadence (every 2 weeks vs every 21 months) and device support (4 vs 2). allTimeCalc's advantage is in-app purchases (none vs 2). On ads 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

Big Red Clock is free to download; allTimeCalc costs $2.99 up front. Big Red Clock sells 2 in-app purchases, starting at $0.99 per month. allTimeCalc asks for nothing beyond the download.

UpkeepUpdate frequency

Big Red Clock ships an update every 2 weeks, allTimeCalc every 21 months. The most recent releases landed on October 14, 2026 and October 4, 2026 respectively.

Scorecard5 real differences · 5 level
Big Red Clock versus allTimeCalc: the parameters behind the verdict, then further details
ParameterBig Red ClockallTimeCalc
PriceFree — better$2.99
Rating4.6 (183 ratings) — better—
Positive reviews77.4% of reviews—
Number of ratings183 — better—
Update frequencyEvery 2 weeks — betterEvery 21 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree—
DevicesiPhone, iPad, Mac, Apple TV — betteriPhone, iPad
Requires iOS18.6 — better26.0
Further details — not scored
Size15 MB6 MB
Age rating4+4+
DeveloperSingle Sail Software, LLCPaulo Correia

In-app purchases

2 purchases

Big Red Clock

Subscriptions2
  • Monthly1 Month trial$0.991 Month
  • Yearly1 Month trial$5.991 Year
None

allTimeCalc

No in-app purchases

Questions

Is Big Red Clock free?
Big Red Clock is free to download, with in-app purchases available.
Is allTimeCalc free?
allTimeCalc costs $2.99, with no in-app purchases.
Do Big Red Clock or allTimeCalc have ads?
Neither Big Red Clock nor allTimeCalc shows ads.
Which is updated more often, Big Red Clock or allTimeCalc?
Big Red Clock ships an update every 2 weeks, and allTimeCalc every 21 months. Most recently, Big Red Clock was updated on October 14, 2026 and allTimeCalc on October 4, 2026.

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