# Relativity Calendar vs DayNumCalc

The clearest difference is price: Relativity Calendar at Free against DayNumCalc's $0.99. Relativity Calendar also leads on update cadence (every 2 months vs every 6 months). On rating, review sentiment, ratings volume and ads there is nothing between them.

Relativity Calendar is free to download; DayNumCalc costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.9 for Relativity Calendar against 4.8 for DayNumCalc. Both are backed by a comparable volume of ratings — 17 and 6 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Relativity Calendar ships an update every 2 months, DayNumCalc every 6 months. The most recent releases landed on November 7, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Relativity Calendar | DayNumCalc |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[4.9 (17 ratings)](https://appshunter.io/ios/app/relativity-calendar/id1481494405/reviews)** | [4.8 (6 ratings)](https://appshunter.io/ios/app/daynumcalc/id1633054306/reviews) |
| Number of ratings | **17** | 6 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | **Free** | Paid |
| Size | 3 MB | 1 MB |
| Requires iOS | **15.0** | 15.5 |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jonathan Cole](https://appshunter.io/developer/1093735229) | [Mayra M Martinez](https://appshunter.io/developer/1633054308) |

## What reviewers say

### Relativity Calendar

[App page](https://appshunter.io/ios/app/relativity-calendar/id1481494405)

This app redefines how you view dates by allowing you to express any day relative to any month. See custom dates like 'May 32nd' or 'March 93rd' at a glance. It offers home screen widgets and Apple Watch complications for easy access.

**Highlights:** Express dates relative to any month, Home screen widgets with color customization, Apple Watch complications, iOS 16 Lock Screen widgets, Track custom dates and holidays

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Relativity Calendar free?

Relativity Calendar is free to download, with no in-app purchases.

### Is DayNumCalc free?

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

### Which has better reviews, Relativity Calendar or DayNumCalc?

Relativity Calendar is rated higher. Relativity Calendar averages 4.9 out of 5 from 17 ratings, while DayNumCalc averages 4.8 from 6 ratings.

### Do Relativity Calendar or DayNumCalc have ads?

Neither Relativity Calendar nor DayNumCalc shows ads.

### Which is updated more often, Relativity Calendar or DayNumCalc?

Relativity Calendar ships an update every 2 months, and DayNumCalc every 6 months. Most recently, Relativity Calendar was updated on November 7, 2026 and DayNumCalc on November 3, 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.*