DateDiff vs When Will I
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DateDiff
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.
- 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
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An app for calculating the end of a license. It allows setting up the 2 dates and it will calculate how many days are in between, allowing ignore weekends or not. Also, it allows setting up a start date and a number of days and it will calculate the end date. Even more, it let you pin start date as always today to have a days countdown to a specific date.
When Will I
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When Will I is a fun and informative utility to show the time left to a specific event. Whether you're waiting for Christmas, retirement, your birthday, or the next episode of your favorite TV show, When Will I can tell you exactly how long it will be. With When Will I, you can: - Track multiple events at once - Choose from a variety of time units (minutes, seconds, hours, weeks, months, etc.) - Set custom images for each event - Sync your events to your connected Apple Watch
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | DateDiff | When Will I |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 5 weeks — better | Every 7 months |
| Ads | Yes | Yes |
| In-app purchases | No | No |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPad, iPod — better | iPhone, Apple Watch |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 52 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | David Vives | Talon Strike Software |
In-app purchases
DateDiff
No in-app purchases
When Will I
No in-app purchases
