# DateDiff vs When Will I

The clearest difference is update cadence: DateDiff at every 5 weeks against When Will I's every 7 months. DateDiff also leads on iOS requirement (9.0 vs 17.0). On price, ads, in-app purchases and device support 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, When Will I every 7 months. The most recent releases landed on September 16, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | DateDiff | When Will I |
| --- | --- | --- |
| 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 7 months |
| Monetization | Ad-supported | — |
| Size | 52 MB | 5 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [David Vives](https://appshunter.io/developer/1164312492) | [Talon Strike Software](https://appshunter.io/developer/558604945) |

## 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


### When Will I

[App page](https://appshunter.io/ios/app/when-will-i/id6466922587)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DateDiff free?

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

### Is When Will I free?

When Will I is free to download, with no in-app purchases.

### Do DateDiff or When Will I have ads?

Both DateDiff and When Will I show ads.

### Which is updated more often, DateDiff or When Will I?

DateDiff ships an update every 5 weeks, and When Will I every 7 months. Most recently, DateDiff was updated on September 16, 2026 and When Will I on September 18, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*