When vs Ducker Detective
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
When
This app helps you remember important dates for your friends and family. It imports contacts and Facebook friends, then notifies you via badge icon or local notifications when a birthday is approaching. You can also send quick wishes directly from the app.
- Birthday reminders
- Import from Contacts
- Import from Facebook
- Local notifications
- Badge icon alerts
- Send quick wishes
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"When - anniversary remembrancer" is used to remind you about your friends' birthdays. It's very simple and has only necessary functionality: maintains a list of your friends and notifies you when their birthdays come. "When" does not send you any push notifications but uses the badge icon and local notifications to inform about birthdays. What the application does: - imports friends from Contacts, - imports friends from Facebook (only those who use this app), - allows editing your friends, - displays friends who had a birthday recently, will have it soon or have it today - uses badge icon or local notifications to notify about birthdays, - allows sending simple wishes (mail, sms, call) to the person who has a birthday today. If you have any comments, please feel free to contacts us at when@nomtek.com.
Ducker Detective
Easily calculate anyone's age using their birth month and day. This tool can help you verify ages, play harmless pranks, or even predict baby birth dates based on due dates.
- Calculate age from birth month and day
- Verify ages
- Predict baby birth dates
- Play age-related jokes
- Age verification tool
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Do you want to find out people’s age with just the month and day of birth or want to calculate someone’s age using the built-in Age Calculator.You can find out your favorite celebrity or friends’ age also. Check when people are lying about their age. Ducker Detective is a great tool to have. Play a joke on someone and ask them for their month and day of birth and surprise them with their age or with the year they were born. Even more, do you want to predict a baby’s birth based on the doctor's expected birth to get a more accurate prediction.
Screenshots
Verdict
The clearest difference is review sentiment: Ducker Detective at 100% against When's 60%. Ducker Detective also leads on ratings volume (24 vs 1). When's advantage is in-app purchases (none vs 10) and rating (5.0 vs 4.8). On price, update cadence, ads 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. Ducker Detective sells 10 in-app purchases, starting at $0.99 per month. When asks for nothing beyond the download.
When holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Ducker Detective has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 60% of When's written reviews are positive against 100% of Ducker Detective's, so the app with the better star average is not the one people write more warmly about.
Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.
| Parameter | When | Ducker Detective |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.8 (24 ratings) |
| Positive reviews | 60.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 1 | 24 — better |
| Update frequency | Every 2 months | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 10.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 4 MB | 100 MB |
| Age rating | 4+ | 4+ |
| Developer | Nomtek sp. z o.o. | Ducker Detective, LLC |
Customer experience
When
Ducker Detective
In-app purchases
When
No in-app purchases
Ducker Detective
- GIF subscription monthly$0.991 Month
- Sticker subscription monthly$0.991 Month
- StickerGIF subscription montly$0.991 Month
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- GIF subscription six month$4.996 Months
- Sticker subscription six month$4.996 Months
- StickerGIF Six-Month Plan$4.996 Months
- Ad-Free Subscription Yearly$9.991 Year
- GIF subscription yearly$9.991 Year
- Sticker subscription yearly$9.991 Year
- StickerGIF subscription yearly$9.991 Year
Questions
Is When free?
Is Ducker Detective free?
Which has better reviews, When or Ducker Detective?
Do When or Ducker Detective have ads?
Which is updated more often, When or Ducker Detective?
Other comparisons
