# DateCalcMemo ～ how many days vs Clock4Key World Clock Keyboard

The clearest difference is update cadence: Clock4Key World Clock Keyboard at daily against DateCalcMemo ～ how many days's fortnightly. Clock4Key World Clock Keyboard also leads on monetization model (free vs free with in-app purchases). DateCalcMemo ～ how many days's advantage is ratings volume (6 vs 1) and iOS requirement (8.0 vs 15.0). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for DateCalcMemo ～ how many days against 5.0 for Clock4Key World Clock Keyboard. That said, the two scores are not equally well evidenced: DateCalcMemo ～ how many days has 6 ratings behind it against 1, so its average is the more settled of the two.

DateCalcMemo ～ how many days ships an update fortnightly, Clock4Key World Clock Keyboard daily. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | DateCalcMemo ～ how many days | Clock4Key World Clock Keyboard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (6 ratings)](https://appshunter.io/ios/app/datecalcmemo-how-many-days/id702646469/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/clock4key-world-clock-keyboard/id6503244597/reviews) |
| Number of ratings | **6** | 1 |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 9 MB | 3 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [TOSHIYUKI SEKIZAKI](https://appshunter.io/developer/664398153) | [Khang Le](https://appshunter.io/developer/1078541780) |

## What reviewers say

### DateCalcMemo ～ how many days

[App page](https://appshunter.io/ios/app/datecalcmemo-how-many-days/id702646469)

Calculate the number of days between two dates or determine a future or past date based on a given number of days. Save important calculation results with associated notes.

**Highlights:** Calculate days between two dates, Calculate future/past dates, Save calculation results, Add notes to saved calculations, Delete app data when app is removed

**Features:** macOS Compatibility

**In-app purchases:** none


### Clock4Key World Clock Keyboard

[App page](https://appshunter.io/ios/app/clock4key-world-clock-keyboard/id6503244597)

This custom keyboard allows users to quickly input the current time for major cities worldwide directly from their device's keyboard. It offers real-time global time updates and an intuitive design for efficient time zone coordination.

**Highlights:** Instant time input for global cities, Real-time worldwide time updates, Seamless keyboard integration, Avoids manual time conversions, Ideal for travelers and professionals

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DateCalcMemo ～ how many days free?

DateCalcMemo ～ how many days is free to download, with no in-app purchases.

### Is Clock4Key World Clock Keyboard free?

Clock4Key World Clock Keyboard is free to download, with no in-app purchases.

### Which has better reviews, DateCalcMemo ～ how many days or Clock4Key World Clock Keyboard?

DateCalcMemo ～ how many days and Clock4Key World Clock Keyboard are both rated 5.0 out of 5 on the App Store, from 6 and 1 ratings respectively.

### Do DateCalcMemo ～ how many days or Clock4Key World Clock Keyboard have ads?

Neither DateCalcMemo ～ how many days nor Clock4Key World Clock Keyboard shows ads.

### Which is updated more often, DateCalcMemo ～ how many days or Clock4Key World Clock Keyboard?

DateCalcMemo ～ how many days ships an update fortnightly, and Clock4Key World Clock Keyboard daily. Most recently, DateCalcMemo ～ how many days was updated on November 1, 2026 and Clock4Key World Clock Keyboard on October 30, 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.*