sunClock World Map vs Black Memorial Day
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
sunClock World Map
Visualize global night and day cycles on an equirectangular world map. Get sunrise, sunset, and weather data for any location. Tap the map to view specific place details.
- World map with night shade visualization
- Sunrise and sunset times
- Location-specific weather data
- Tap to view individual location data
- GPS location access for data
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sunClock App: to see night shade on an equirectangular-projection of a world map. Additionally the app provides location data as sunrise and sunset as well as weather data. Therefore the app needs a location GPS access. The location data will not be used for any other purpose. With a tap on the map it is possible to display single location data of other places. It is possible to remove the Google advertisement by purchasing this app. Just click purchase in the Settings page.
Black Memorial Day
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Most people don't know that Memorial Day was founded by Black Americans. I n 1865, approximately 10,000 formerly enslaved people in Charleston organized the first large-scale Memorial Day ceremony in the United States — years before any official holiday was declared. Black Memorial Day brings that story, and hundreds like it, to your phone. Explore profiles of Black and Latino soldiers who earned the Medal of Honor, browse a historical timeline from the Civil War to the Iraq War, and discover bite-sized facts about the units, heroes, and sacrifices that shaped American history. Every fact is sourced from credible institutions including the National Archives, the Smithsonian, and the U.S. Army Center of Military History. The app is free and works with Siri, Shortcuts, and Spotlight so history is always a tap or a voice command away. Subscribe to remove ads and support the mission, or leave a one-time tip. Either way, the history stays free for everyone. We use the Apple Standard agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is ads: sunClock World Map at none against Black Memorial Day's shown. Black Memorial Day's advantage is update cadence (every 4 days vs every 10 months). On price, in-app purchases, device support and iOS requirement 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. sunClock World Map sells 1 one-off in-app purchase and Black Memorial Day sells 4 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.
sunClock World Map ships an update every 10 months, Black Memorial Day every 4 days. The most recent releases landed on September 29, 2026 and October 31, 2026 respectively.
| Parameter | sunClock World Map | Black Memorial Day |
|---|---|---|
| Price | Free | Free |
| Rating | 2.2 (5 ratings) — better | — |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 10 months | Every 4 days — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 26.0 | 26.0 |
| Further details — not scored | ||
| Size | 8 MB | 23 MB |
| Age rating | 4+ | 4+ |
| Developer | Stefan von Weihe | Di Nerd Apps LLC |
In-app purchases
sunClock World Map
- sunClock world map$0.99
Black Memorial Day
- Remove All Ads$3.991 Month
- Small Tip$0.99
- Medium Tip$2.99
- Large Tip$9.99
Questions
Is sunClock World Map free?
Is Black Memorial Day free?
Do sunClock World Map or Black Memorial Day have ads?
Which is updated more often, sunClock World Map or Black Memorial Day?
Other comparisons
