# DateDiff vs Date Radar Countdown Stopwatch

The clearest difference is in-app purchases: DateDiff at none against Date Radar Countdown Stopwatch's 3. DateDiff also leads on ratings volume (4 vs 1) and device support (3 vs 1). Date Radar Countdown Stopwatch's advantage is ads (none vs shown) and update cadence (every 5 days vs every 5 weeks). On price and rating there is nothing between them.

Both are free to download. Date Radar Countdown Stopwatch sells 3 in-app purchases, starting at $0.29 per 3 months. DateDiff asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for DateDiff against 5.0 for Date Radar Countdown Stopwatch. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

DateDiff ships an update every 5 weeks, Date Radar Countdown Stopwatch every 5 days. The most recent releases landed on October 3, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | DateDiff | Date Radar Countdown Stopwatch |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/datediff/id1164312493/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/date-radar-countdown-stopwatch/id6463448697/reviews) |
| Number of ratings | **4** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 5 weeks | **Every 5 days** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 52 MB | 7 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [David Vives](https://appshunter.io/developer/1164312492) | [Jin Yu](https://appshunter.io/developer/1054838879) |

## 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


### Date Radar Countdown Stopwatch

[App page](https://appshunter.io/ios/app/date-radar-countdown-stopwatch/id6463448697)

Easily store significant dates and calculate the time elapsed since or until them. This utility helps you keep track of important events and milestones.

**Highlights:** Store important dates, Calculate ages, Long-term timers, Event tracking

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 month | $0.29 | per 3 months |
| 1 Year | $0.99 | per year |
| Coffee sponsor | $6.99 | one-time |


## Frequently asked questions

### Is DateDiff free?

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

### Is Date Radar Countdown Stopwatch free?

Date Radar Countdown Stopwatch is free to download, with in-app purchases available.

### Which has better reviews, DateDiff or Date Radar Countdown Stopwatch?

DateDiff and Date Radar Countdown Stopwatch are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do DateDiff or Date Radar Countdown Stopwatch have ads?

DateDiff shows ads; Date Radar Countdown Stopwatch does not.

### Which is updated more often, DateDiff or Date Radar Countdown Stopwatch?

DateDiff ships an update every 5 weeks, and Date Radar Countdown Stopwatch every 5 days. Most recently, DateDiff was updated on October 3, 2026 and Date Radar Countdown Stopwatch on October 4, 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.*