# Date.Time Calculator vs Whenr Whenr

The clearest difference is review sentiment: Whenr Whenr at 67% against Date.Time Calculator's 0%. Whenr Whenr also leads on price (Free vs $0.99). Date.Time Calculator's advantage is update cadence (every 5 months vs every 22 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Whenr Whenr is free to download; Date.Time Calculator costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Date.Time Calculator ships an update every 5 months, Whenr Whenr every 22 months. The most recent releases landed on September 9, 2026 and September 2, 2026 respectively.

## The numbers

| Metric | Date.Time Calculator | Whenr Whenr |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[5.0 (4 ratings)](https://appshunter.io/ios/app/whenr-whenr/id1659481999/reviews)** |
| Number of ratings | — | **4** |
| Positive reviews | 0.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 months** | Every 22 months |
| Monetization | Paid | **Free** |
| Size | 1 MB | 4 MB |
| Requires iOS | **15.6** | 16.1 |
| Devices | iPhone, iPod | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Noriaki HASHIBA](https://appshunter.io/developer/978336077) | [Darin Kelkhoff](https://appshunter.io/developer/1659482001) |

## What reviewers say

### Date.Time Calculator

[App page](https://appshunter.io/ios/app/datetime-calculator/id978336078)

Calculate date and time differences, intervals, and perform unit conversions with a pure calculator interface. Useful for determining future or past dates, calculating total time for multiple events, and converting between various time units and POSIX time.

**Highlights:** Date and time point calculations, Time interval calculations, Unit conversion of time, POSIX time interconversion, Time zone mutual conversion, Arithmetic operations with time

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Whenr Whenr

[App page](https://appshunter.io/ios/app/whenr-whenr/id1659481999)

This app simplifies complex time calculations, helping you easily determine time differences, future times, and duration sums. It offers an intuitive interface and convenient options to copy, set reminders, or share results.

**Highlights:** Calculate time differences, Determine future times, Sum time durations, Copy results to clipboard, Create reminders from results, Share time calculations

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Date.Time Calculator free?

Date.Time Calculator costs $0.99, with no in-app purchases.

### Is Whenr Whenr free?

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

### Do Date.Time Calculator or Whenr Whenr have ads?

Neither Date.Time Calculator nor Whenr Whenr shows ads.

### Which is updated more often, Date.Time Calculator or Whenr Whenr?

Date.Time Calculator ships an update every 5 months, and Whenr Whenr every 22 months. Most recently, Date.Time Calculator was updated on September 9, 2026 and Whenr Whenr on September 2, 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.*