LunaSolCal vs K4us German Keyboard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LunaSolCal
This app calculates precise times for sun and moon events, including sunrise, sunset, moonrise, and moonset, for any location and date. It also provides detailed astronomical data and tracks celestial movements. View daily information in the notification center.
- Sunrise and sunset times
- Moonrise and moonset times
- Day length calculation
- Moon phase tracking
- Twilight times (civil, nautical, astronomical)
- Solar and lunar eclipse dates
- Location-based calculations via GPS or city database
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Calculate times of sunrise, sunset, moonrise, moonset and more for your location at any given date. The following data is calculated: - Sunrise - Solar noon - Sunset - Day length - Equation of time - Declination - Civil twilight (Dawn/Dusk) - Nautical twilight (Dawn/Dusk) - Astronomical twilight (Dawn/Dusk) - Azimuth at sunrise and sunset - Altitude during solar noon - Sun track - Date and time of Seasons (Spring, Summer, Fall, Winter) - Solstice and Equinox dates - Date and time of next solar eclipse - Moonrise - Moon transit - Moonset - Moon phase - Distance - Declination - Date and time of next new moon - Date and time of next full moon - Azimuth at moonrise and moonset - Altitude during moon transit - Moon track - Date and time of next lunar eclipse Some information for the current day can also be viewed in the notification center. To specify the location of interest either get the position from the built-in GPS or Wifi receiver or select a city from a database with over 400,000 cities in over 200 countries.
K4us German Keyboard
This keyboard app offers an original German layout for iPhone and iPad, featuring dedicated arrow keys and easy access to special German characters like ä, ö, ü, and ß. It also includes PC-like ten keys for iPad users and allows users to disable key sounds through its settings.
- Original German keyboard layout
- Dedicated arrow keys
- Easy input for ä, ö, ü, ß
- iPad ten-key layout
- Customizable key sound
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For iPhone User please try "AEI Keyboard Note" App. (This app is Free) Original German Keyboard for iPhone & iPad * With Arrow Keys * Ideal Key for iPhone * Easy to input “ä Ä ö Ö ü Ü ß" * iPad Special Ten Keys like PC Ten Keys. Useful keyboard Settings (tap"tools") You can turn off Key Sound from it. Please add this Keyboard from iOS Setting and switch "Allow Full Access" Note : This app may not work on Old Apps.
Screenshots
Verdict
The clearest difference is update cadence: LunaSolCal at every 2 months against K4us German Keyboard's every 19 months. K4us German Keyboard's advantage is price ($0.99 vs $4.99) and iOS requirement (15.6 vs 17.0). On review sentiment, 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
LunaSolCal costs $4.99 and K4us German Keyboard $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
LunaSolCal ships an update every 2 months, K4us German Keyboard every 19 months. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.
| Parameter | LunaSolCal | K4us German Keyboard |
|---|---|---|
| Price | $4.99 | $0.99 — better |
| Rating | 4.9 (1.2K ratings) — better | — |
| Positive reviews | 95.5% of reviews | 100.0% of reviews — better |
| Number of ratings | 1.2K — better | — |
| Update frequency | Every 2 months — better | Every 19 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 64 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Volker Voecking Software Engineering | Toshihiro Nakane |
Customer experience
LunaSolCal
K4us German Keyboard
Bugs and requests
LunaSolCal
Reported bugs
2 issues- Notifications not working properly
- Crashes when using map layer select
Requested features
3 requests- Add lockscreen widget
- Implement automatic light/dark mode switching
- Integrate with calendar for event planning
K4us German Keyboard
Not enough reviews yet to summarise bugs or requests.
In-app purchases
LunaSolCal
No in-app purchases
K4us German Keyboard
No in-app purchases
Questions
Is LunaSolCal free?
Is K4us German Keyboard free?
Do LunaSolCal or K4us German Keyboard have ads?
Which is updated more often, LunaSolCal or K4us German Keyboard?
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