Date and time calc vs Calphace
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Date difference calculation
- Date addition and subtraction
- Time difference calculation
- Time addition and subtraction
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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
Calphace
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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
Verdict
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
Both are free to download. Calphace sells 3 one-off in-app purchases. Date and time calc asks for nothing beyond the download.
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.
| Parameter | Date and time calc | Calphace |
|---|---|---|
| Price | Free | Free |
| Positive reviews | 28.6% of reviews | — |
| Update frequency | Every 11 months | Monthly — better |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone | iPhone |
| Requires iOS | 17.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 6 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Osamu Ishigami | Akihiro Usui |
In-app purchases
Date and time calc
No in-app purchases
Calphace
- Snack-Sized Tip$0.49
- Coffee-Sized Tip$1.99
- Lunch-Sized Tip$3.99
Questions
Is Date and time calc free?
Is Calphace free?
Do Date and time calc or Calphace have ads?
Which is updated more often, Date and time calc or Calphace?
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