# DateDiff vs Unit Converter

The clearest difference is update cadence: DateDiff at every 5 weeks against Unit Converter's every 4 months. DateDiff also leads on device support (3 vs 1) and iOS requirement (9.0 vs 18.2). On price, ads and in-app purchases there is nothing between them.

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

DateDiff ships an update every 5 weeks, Unit Converter every 4 months. The most recent releases landed on October 3, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | DateDiff | Unit Converter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/datediff/id1164312493/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | Ad-supported | — |
| Size | 52 MB | 36 MB |
| Requires iOS | **9.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [David Vives](https://appshunter.io/developer/1164312492) | [Emad Alhalabi](https://appshunter.io/developer/1869432996) |

## What reviewers say

### DateDiff

[App page](https://appshunter.io/ios/app/datediff/id1164312493)

Calculate the duration between two dates, with options to include or exclude weekends. It can also determine an end date based on a start date and a duration, or function as a countdown timer from today to a specific event.

**Highlights:** Calculate days between two dates, Include or exclude weekends, Calculate end date from start date and duration, Countdown timer from today, Pin start date as today

**In-app purchases:** none


### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-offline/id6758582848)

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

**In-app purchases:** none


## Frequently asked questions

### Is DateDiff free?

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

### Is Unit Converter free?

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

### Do DateDiff or Unit Converter have ads?

Both DateDiff and Unit Converter show ads.

### Which is updated more often, DateDiff or Unit Converter?

DateDiff ships an update every 5 weeks, and Unit Converter every 4 months. Most recently, DateDiff was updated on October 3, 2026 and Unit Converter on October 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.*