Comparison

Spacetime Clock vs SAMURAI ALARM Lite

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Spacetime Clock

Explore celestial mechanics and terrestrial positioning with this app. Visualize moon phases, Earth's rotation, and your location's latitude and longitude. It also includes a compass and level meter for your device.

Highlights
  • Moon phases visualization
  • Earth rotation and revolution simulation
  • Latitude and longitude display
  • Compass functionality
  • iPhone level meter
  • Customizable background colors
Features
Read full description

Time, calendars, the movements and positions of celestial bodies, and direction are all closely connected. This app brings together time and place in one view. Alongside the time and date, it shows the phases of the Moon, Earth’s rotation and orbit, latitude and longitude, compass direction, and the iPhone’s level. It lets you see and feel where you are in time and space at a glance. [Top of Screen] MOON: Moon phase (lunar age 0–29) HOURS: Hours (24-hour cycle) MINUTES: Minutes (60-minute cycle) SECONDS: Seconds (60-second cycle) [Center of Screen] The year, month, date, hour, minute, day of the week, and second are displayed. Earth completes one circuit around the center of the screen in 365 days (366 in a leap year). The display uses Earth’s axial tilt to approximate the amount of daylight at that time of year. It does not show precise sunrise or sunset times. The Earth and Moon graphics change depending on whether your current latitude is in the Northern or Southern Hemisphere. [Bottom of Screen] LATITUDE: Latitude (−90° to +90°; positive values indicate north, negative values south) LONGITUDE: Longitude (−180° to +180°; positive values indicate east, negative values west) COMPASS: Direction of north LEVEL: Level, measured along the iPhone’s X and Y axes Choose from four background colors: Space, Midnight, Twilight, and Sky Blue.

About

SAMURAI ALARM Lite

Features
Read full description

SAMURAI ALARM is the alarm clock designed on the concept of Japanese SAMURAI. This app will supplies fundamental functions as alarm clock, and some characteristic sounds, wallpapers to your iOS devices. Would you like to manage your time with Japanese unique sounds? —————————————————— Functions: ・Alarm……You can set seven alarms at most, labeled unique name individually. Even when iPhone is locked or slept, alarm will work and inform you of the time. ・Appointing day……You can appoint what day alarm rings. ・Snooze ・Vibration ・Changing alarm volume……You can change each alarm volume individually. ・About the alarm forced stop function after 30 minutes have passed …… 30 minutes after the alarm sounds, the alarm is forcibly stopped. When the app is locked, an alarm sounds every 5 minutes from the set time, and after 30 minutes, the alarm is forcibly stopped. When snooze is set, an alarm sounds every 5 minutes after the snooze setting time, and the alarm is forcibly stopped after 30 minutes have passed. ・Many alarm sounds……You can set not only pre-installed sounds, but also the stored music in iPhone which you like as alarm sound. ・Additionally, you can record voice of friend, family, boyfriend or girlfriend, and set it as alarm sound, too.(Only when app is displayed. When app is not displayed, we can set only pre-installed sounds as alarm sound.) ・Military time or not(using am/pm) ・Wallpaper……You can set stored pictures in iPhone which you like, as a wallpaper for this app. ・Changing font color of displayed time……You can select black or white in tune with wallpaper. ・Disabling auto lock……You can disable auto lock of iPhone while this app is foreground. ・To use the alarm function is essential notification settings. ※Free version has advertisements. —————————————————— Language: English and Japanese Compatibility: iPhone(iOS9.0 or later) ◇ About alarm sound Some alarm sounds used in this application have been received from "Free BGM DOVA - SYNDROME". I would like to take this opportunity to thank you for "Free BGM DOVA - SYNDROME". "Free BGM DOVA-SYNDROME" site URL Https://dova-s.jp/ If there are any issues or suggestions, please contact us at support@transsoft.jp

Screenshots

Spacetime Clock4 screens
SAMURAI ALARM Lite4 screens

Verdict

The call

The clearest difference is update cadence: Spacetime Clock at every 5 weeks against SAMURAI ALARM Lite's every 5 months. SAMURAI ALARM Lite's advantage is device support (3 vs 1) and iOS requirement (11.0 vs 16.0). On price, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Spacetime Clock ships an update every 5 weeks, SAMURAI ALARM Lite every 5 months. The most recent releases landed on November 1, 2026 and November 6, 2026 respectively.

Scorecard3 real differences · 7 level
Spacetime Clock versus SAMURAI ALARM Lite: the parameters behind the verdict, then further details
ParameterSpacetime ClockSAMURAI ALARM Lite
PriceFreeFree
Rating2.8 (4 ratings) — better—
Positive reviews40.9% of reviews—
Number of ratings4 — better—
Update frequencyEvery 5 weeks — betterEvery 5 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS16.011.0 — better
Further details — not scored
Size6 MB65 MB
Age rating4+4+
Developery-designTranssoft Inc.

In-app purchases

None

Spacetime Clock

No in-app purchases

None

SAMURAI ALARM Lite

No in-app purchases

Questions

Is Spacetime Clock free?
Spacetime Clock is free to download, with no in-app purchases.
Is SAMURAI ALARM Lite free?
SAMURAI ALARM Lite is free to download, with no in-app purchases.
Do Spacetime Clock or SAMURAI ALARM Lite have ads?
Neither Spacetime Clock nor SAMURAI ALARM Lite shows ads.
Which is updated more often, Spacetime Clock or SAMURAI ALARM Lite?
Spacetime Clock ships an update every 5 weeks, and SAMURAI ALARM Lite every 5 months. Most recently, Spacetime Clock was updated on November 1, 2026 and SAMURAI ALARM Lite on November 6, 2026.

Other comparisons