# Date and Time Calculator vs DOY

The clearest difference is rating: Date and Time Calculator at 4.7 against DOY's 3.0. Date and Time Calculator also leads on review sentiment (81% vs 50%) and ratings volume (9.9K vs 2). DOY's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

Date and Time Calculator holds the better App Store score, 4.7 against 3.0. That said, the two scores are not equally well evidenced: Date and Time Calculator has 9.9K ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 81% of Date and Time Calculator's written reviews are positive against 50% of DOY's.

Date and Time Calculator ships an update every 4 weeks, DOY every 4 months. The most recent releases landed on November 1, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Date and Time Calculator | DOY |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (9.9K ratings)](https://appshunter.io/ios/app/date-and-time-calculator/id552798167/reviews)** | [3.0 (2 ratings)](https://appshunter.io/ios/app/doy/id1208546429/reviews) |
| Number of ratings | **9.9K** | 2 |
| Positive reviews | **81.0% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 weeks** | Every 4 months |
| Monetization | Ad-supported | **Free** |
| Size | 18 MB | 6 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [山 钟](https://appshunter.io/developer/1289109809) | [Daniel Hansen](https://appshunter.io/developer/312733912) |

## What reviewers say

### Date and Time Calculator

[App page](https://appshunter.io/ios/app/date-and-time-calculator/id552798167)

Calculate the exact number of days, hours, and seconds between any two dates. This tool also allows you to find the date before or after a specified period, making it useful for tracking deadlines, events, or financial products.

**Highlights:** Calculate time between any two dates, Second-level precision, Calculate future dates, Calculate past dates, Period time calculation

**In-app purchases:** none

**What reviewers like**

- 💡 Helpful for tracking dates and time
- 👍 Simple and easy to use
- 🚀 Accurate calculations
- 🚀 Useful for various purposes (medication management, work timelines, etc.)

**What reviewers complain about**

- 🐛 Ads are intrusive and difficult to close
- 🐛 Compatibility issues on iPad
- 🐛 Bugs with date/time calculations
- 🐛 Language issues with ads

**Reported bugs**

- Date/time calculations not always accurate
- Inability to close ads
- Compatibility issues on certain devices

**Requested features**

- Option to calculate business days
- Ability to save frequently used dates
- 24-hour time format
- Improved user interface


### DOY

[App page](https://appshunter.io/ios/app/doy/id1208546429)

This app helps you track important upcoming events by counting down the days. It also provides the Day Of Year and sunrise/sunset times for each event based on your location.

**Highlights:** Countdown to user-defined events, Displays Day Of Year for events, Provides sunrise and sunset times, Location-based sunrise/sunset data, Inspired by military 'short timer' tapes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Date and Time Calculator free?

Date and Time Calculator is free to download, with no in-app purchases.

### Is DOY free?

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

### Which has better reviews, Date and Time Calculator or DOY?

Date and Time Calculator is rated higher. Date and Time Calculator averages 4.7 out of 5 from 9.9K ratings, while DOY averages 3.0 from 2 ratings.

### Do Date and Time Calculator or DOY have ads?

Date and Time Calculator shows ads; DOY does not.

### Which is updated more often, Date and Time Calculator or DOY?

Date and Time Calculator ships an update every 4 weeks, and DOY every 4 months. Most recently, Date and Time Calculator was updated on November 1, 2026 and DOY on October 20, 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.*