# DateCalcMemo ～ how many days vs Z Scan

The clearest difference is update cadence: Z Scan at weekly against DateCalcMemo ～ how many days's fortnightly. DateCalcMemo ～ how many days's advantage is iOS requirement (8.0 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

DateCalcMemo ～ how many days ships an update fortnightly, Z Scan weekly. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | DateCalcMemo ～ how many days | Z Scan |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (6 ratings)](https://appshunter.io/ios/app/datecalcmemo-how-many-days/id702646469/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 9 MB | 7 MB |
| Requires iOS | **8.0** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 9+ |
| Developer | [TOSHIYUKI SEKIZAKI](https://appshunter.io/developer/664398153) | [小静 杨](https://appshunter.io/developer/1546449530) |

## 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


### Z Scan

[App page](https://appshunter.io/ios/app/z-scan-ocr-text-scanner/id6755809545)

**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 Z Scan free?

Z Scan is free to download, with no in-app purchases.

### Do DateCalcMemo ～ how many days or Z Scan have ads?

Neither DateCalcMemo ～ how many days nor Z Scan shows ads.

### Which is updated more often, DateCalcMemo ～ how many days or Z Scan?

DateCalcMemo ～ how many days ships an update fortnightly, and Z Scan weekly. Most recently, DateCalcMemo ～ how many days was updated on November 1, 2026 and Z Scan on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*