Comparison

Date and time calc vs Calphace

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

Head to head
About

Date and time calc

Easily calculate the difference between dates or add/subtract time intervals. This utility app simplifies date and time arithmetic with straightforward operations.

Highlights
  • Date difference calculation
  • Date addition and subtraction
  • Time difference calculation
  • Time addition and subtraction
Features
Read full description

This is a convenient app that makes date and time calculations easy. With simple operation, you can quickly perform the calculations you need. # Features - Date difference calculation - Date addition and subtraction - Time difference calculation - Time addition and subtraction

About

Calphace

Features
Read full description

Calendar + Photo + Face = Calphace! Calphace is an application that generates a composite image of a calendar on a photo of your choice and sets it on the photos watch face of your Apple Watch. There are times when you just want to easily check your calendar on your Apple Watch! Some calendar apps allow you to check your calendar, but it takes several taps. In such cases, if you set the image generated by Calphace as a photos watch face, you can check the calendar just by lifting your wrist. *Calphace does not display a calendar with complications, but only generates a composite image of a calendar,  so it is not possible to check the schedule, etc. entered with the iPhone calendar application. Please understand. ・You can adjust the position and size of the image while checking it in the preview. ・You can select the calendar to be created from the current month and the following month. ・The color of each calendar letter (year, month, weekday, Saturday, and holiday) can be freely selected. ・You can select the starting day of the month or day of the week for the calendar. ・The year display format can be selected, such as 2021, Reiwa 3, etc. ・Month display format can be selected, such as September, SEP, etc. ・Select the display format for the day of the week, such as Mon, MON, etc. ・Japanese national holidays are supported. ・URL scheme support (calphace://) *Starting with watchOS 11, you can adjust the position of the watch using the following steps. If it overlaps with the calendar, please adjust it accordingly. ・Open the Watch app on your iPhone. ・Select the photo watch face you want to adjust from "My Watch" and "My Faces". ・Tap the "n photos" button next to "Select Photos" under "Content". ・Tap the photo you want to adjust and adjust the layout. ・Tap "Save" in the top-right corner.

Screenshots

Date and time calc4 screens
Calphace2 screens

Verdict

The call

The clearest difference is in-app purchases: Date and time calc at none against Calphace's 3. Calphace's advantage is update cadence (monthly vs every 11 months). On price, ads, device support and iOS requirement 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. Calphace sells 3 one-off in-app purchases. Date and time calc asks for nothing beyond the download.

UpkeepUpdate frequency

Date and time calc ships an update every 11 months, Calphace monthly. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard2 real differences · 6 level
Date and time calc versus Calphace: the parameters behind the verdict, then further details
ParameterDate and time calcCalphace
PriceFreeFree
Positive reviews28.6% of reviews—
Update frequencyEvery 11 monthsMonthly — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported—
DevicesiPhoneiPhone
Requires iOS17.617.0 — better
Further details — not scored
Size6 MB7 MB
Age rating4+4+
DeveloperOsamu IshigamiAkihiro Usui

In-app purchases

None

Date and time calc

No in-app purchases

3 purchases

Calphace

One-time3
  • Snack-Sized Tip$0.49
  • Coffee-Sized Tip$1.99
  • Lunch-Sized Tip$3.99

Questions

Is Date and time calc free?
Date and time calc is free to download, with no in-app purchases.
Is Calphace free?
Calphace is free to download, with in-app purchases available.
Do Date and time calc or Calphace have ads?
Both Date and time calc and Calphace show ads.
Which is updated more often, Date and time calc or Calphace?
Date and time calc ships an update every 11 months, and Calphace monthly. Most recently, Date and time calc was updated on October 29, 2026 and Calphace on October 27, 2026.

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