Sky Window vs Whenr Whenr
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Sky Window
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This App is needed for control the Hera Sky Window. Create "Indoor" lifelike daylight. The daylight ambiente with Sky Window is realized by a simulated 3D-heaven and shiftable solar irradiation. Amazing daylight effects will be realized.
Whenr Whenr
This app simplifies date and time calculations with a calculator-style interface. Easily add or subtract durations, find the difference between dates, and convert units of time without complex forms or modes.
- Date and time calculations
- Duration addition and subtraction
- Days between dates
- Unit time conversions
- Calculator-style interface
- No mode switching
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Doing math with dates and times is hard. Whenr Whenr makes it easy, with a simple calculator-style interface for dates, times, durations, and unit conversions. There are no awkward forms, no modes to switch between, and no workflows to learn. Just type in your values, select the function you want to apply, and get your answer. With Whenr Whenr you can: - Answer time questions quick and easy. For example, calculate “how long is it from now until 7:42?” or “what time will it be in 4 hours and 47 minutes?”? - Count days between dates, add weeks to a date, or work across months without manually counting. - Make schedules easier to reason about. Figure out equal turns, manipulate durations, split time fairly, and keep plans running smoothly. - Make weird durations readable. Convert amounts like 400 hours into weeks, 5,000 minutes into days, or 10,000 seconds into hours, so you can actually think about them. And it does all this in a familiar calculator-style interface - not a maze of tabs and dropdowns. There's no mode switching, no confusing forms, and no translating your question into an app's weird logic. You just enter dates and times using the keypad and get the right answer fast.
Screenshots
Verdict
The clearest difference is iOS requirement: Sky Window at 9 against Whenr Whenr's 16.1. 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.
| Parameter | Sky Window | Whenr Whenr |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (4 ratings) — better |
| Positive reviews | — | 66.7% of reviews |
| Number of ratings | — | 4 — better |
| Update frequency | — | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, Mac — better |
| Requires iOS | 9 — better | 16.1 |
| Further details — not scored | ||
| Size | 23 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Hera GmbH & Co. KG | Darin Kelkhoff |
In-app purchases
Sky Window
No in-app purchases
Whenr Whenr
No in-app purchases









