# DayNumCalc vs OnlyWeekNo.

The clearest difference is price: OnlyWeekNo. at Free against DayNumCalc's $0.99. OnlyWeekNo. also leads on update cadence (every 2 months vs every 6 months). DayNumCalc's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

OnlyWeekNo. is free to download; DayNumCalc costs $0.99 up front. OnlyWeekNo. sells 1 one-off in-app purchase. DayNumCalc asks for nothing beyond the download.

DayNumCalc ships an update every 6 months, OnlyWeekNo. every 2 months. The most recent releases landed on September 10, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | DayNumCalc | OnlyWeekNo. |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[4.8 (6 ratings)](https://appshunter.io/ios/app/daynumcalc/id1633054306/reviews)** | — |
| Number of ratings | **6** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | Paid | — |
| Size | 1 MB | 4 MB |
| Requires iOS | **15.5** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Mayra M Martinez](https://appshunter.io/developer/1633054308) | [Takenori Kabeya](https://appshunter.io/developer/289913597) |

## What reviewers say

### DayNumCalc

[App page](https://appshunter.io/ios/app/daynumcalc/id1633054306)

This utility app provides quick access to date calculations, including finding the day number for any date, determining a date from a day number, calculating the difference between two dates, and checking the day of the week. It also offers widgets for convenient access on your home and lock screens.

**Highlights:** Calculate day number from date, Determine date from day number, Calculate days between two dates, Add/subtract days from a date, Check day of the week, Home screen widgets, Today View widgets, Lock screen widgets

**In-app purchases:** none


### OnlyWeekNo.

[App page](https://appshunter.io/ios/app/onlyweekno/id6448488587)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Disable Advertising | $0.49 | one-time |


## Frequently asked questions

### Is DayNumCalc free?

DayNumCalc costs $0.99, with no in-app purchases.

### Is OnlyWeekNo. free?

OnlyWeekNo. is free to download, with in-app purchases available.

### Do DayNumCalc or OnlyWeekNo. have ads?

OnlyWeekNo. shows ads; DayNumCalc does not.

### Which is updated more often, DayNumCalc or OnlyWeekNo.?

DayNumCalc ships an update every 6 months, and OnlyWeekNo. every 2 months. Most recently, DayNumCalc was updated on September 10, 2026 and OnlyWeekNo. on September 17, 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.*