WattTimeIsIt? vs Datum
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WattTimeIsIt?
Easily adjust cooking times for frozen meals based on your microwave's wattage. Avoid under or overcooking your food by converting standard instructions to match your specific appliance.
- Adjust cooking times for wattage differences
- Prevent under/overcooking food
- Works with various microwave wattages
- Ensures perfectly cooked meals
- Simple and easy to use tool
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Have a powerful (or weaker) microwave than the "norm?" Annoyed that frozen dinner packages say, "Cook for 5 minutes on high (based on a 1100W microwave)," but your microwave is 1300W or 700W? This app is for you! WattTimeIsIt? is a simple tool that will ensure that you don't under/overcook your food, given a difference in wattage. Perfectly cooked food designed for your microwave wattage, not a test kitchen's microwave. Just ask WattTimeIsIt? and you're all set! **Remember to be safe and always check the temperature of your food before eating it.**
Datum
A minimalist calendar application designed for Apple devices, offering a clean interface and customizable widgets for iOS, macOS, and watchOS. View upcoming events, daily schedules, and monthly overviews directly from your home screen or watch face.
- Minimalist calendar interface
- Lockscreen widgets for iOS
- Event display widgets
- Calendar widgets with event marks
- watchOS calendar and complications
- Support for iPhone, iPad, Mac, and Apple Watch
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Datum is a minimalistic iOS, watchOS, macOS and visionOS calendar app. For iOS there are Lockscreen Widgets that show you the current date and there are Lockscreen Widgets that show up to 3 events for today. The iOS and macOS apps include the following widgets: - a small widget that shows the current date and at the bottom the events for this day - a small widget that shows a calendar with up to 3 event marks for each day - a medium widget that shows the same as the first small widget and on the right side a calendar with up to 3 event marks for each day - a large widget that shows the same as the medium widget and a list of the upcoming events - a extra large widget that shows a calendar and a list of the upcoming events (only for iPadOS 15+) The watchOS app shows a calendar with up to 3 event marks for each day. You can switch to the next/previous month by tapping on the arrows at the bottom of the calendar. You can view all events for each day by tapping on a day. There are also complications for all watchfaces included that show you the current date.
Screenshots
Verdict
The clearest difference is review sentiment: Datum at 100% against WattTimeIsIt?'s 50%. Datum also leads on update cadence (every 3 months vs every 40 months) and device support (5 vs 3). WattTimeIsIt?'s advantage is price ($0.99 vs $1.99) and iOS requirement (14.0 vs 17.6). On ads, in-app purchases and monetization model 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
WattTimeIsIt? costs $0.99 and Datum $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
WattTimeIsIt? ships an update every 40 months, Datum every 3 months. The most recent releases landed on November 1, 2026 and November 3, 2026 respectively.
| Parameter | WattTimeIsIt? | Datum |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 4.7 (3 ratings) — better | — |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 — better | — |
| Update frequency | Every 40 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Apple Watch, Vision Pro — better |
| Requires iOS | 14.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 2 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | Visoft, Inc. | Michael Lindinger |
Customer experience
WattTimeIsIt?
Datum
In-app purchases
WattTimeIsIt?
No in-app purchases
Datum
No in-app purchases









