Comparison

Combat Clock 2a vs Sun Calculator

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

Head to head
About

Combat Clock 2a

This app replicates a 1957 Air Force 24-hour analog clock. It displays current GPS coordinates, heading, and compass bearing, indicating direction in portrait mode. The application is active only when in the foreground and does not save or transmit any personal data.

Highlights
  • 24-hour analog clock display
  • Sweeping second hand
  • GPS coordinate display
  • Heading and compass bearing
  • Portrait mode directional indicator
  • Foreground active only
Features
Read full description

Combat Clock is a 24-hour analog clock (sweeping second hand) that is a contemporary replica of a 1957 Air Force clock possible used in a missile silo. Location data is leveraged to display current GPS coordinates, heading and compass bearing that indicates the direction the top of the device (portrait mode) is pointing to (12 is North, 6 South, 3 East and 9 is West). The application is active only when it is in the foreground. No location or personal data is saved or sent from the device. There are no in-application advertisements, or purchases.

About

Sun Calculator

This app simulates the sun's movement and sunlight phases in a 3D environment. It calculates sun azimuth, height, and shadow length for any given location and time, with interactive controls for time flow and device orientation.

Highlights
  • Interactive 3D sun movement simulation
  • Calculates sun azimuth, height, and zenith angle
  • Sunrise, sunset, dusk, and dawn time calculation
  • Daytime length and shadow length calculation
  • Custom object height for shadow distance
  • Device rotation for compass orientation
  • Time flow for shadow change preview
Features
Read full description

Sun calculator show interactive 3D scene that include sun movement and sunlight phases during the given day at the given location. Sun calculator calculate sun azimuth, sun height and zenith angle on the go with time flow. Also calculate dusk time, sunrise time, midday or noon time, sunset time and dawn time for given day. Included day time length. Extra Shadow length calculation on the go with time flow. All result are copy-able. Additionally you can set custom height object to see how much the shadow distance. Rotate your device to see how the sun position it self with compass orientation. Option to fast forward the time by 5 minute to see how the shadow change after sun movement. Select custom location and time date to preview how the sun movement around the world. Great App for outdoor adventurer who plan ahead their day time. The zenith angle is the angle between the sun and the vertical. The zenith angle is similar to the elevation angle but it is measured from the vertical rather than from the horizontal, thus making the zenith angle = 90° - [sun height/elevation]. Solar azimuth angle is defined as the angle between the projection of sun's centre onto the horizontal plane and due south direction. Dusk occurs at the darkest stage of twilight, or at the very end of astronomical twilight after sunset and just before night. At predusk, during early to intermediate stages of twilight, enough light in the sky under clear conditions may occur to read outdoors without artificial illumination; however, at the end of civil twilight (when Earth rotates to a point at which the center of the Sun's disk is 6° below the local horizon), such lighting is required to read outside. The term dusk usually refers to astronomical dusk, or the darkest part of twilight before night begins. Sunrise (or sunup) is the moment when the upper rim of the Sun appears on the horizon in the morning. Noon (or midday) is the time when the Sun appears to contact the local celestial meridian. This is when the Sun reaches its apparent highest point in the sky, at 12 noon apparent solar time and can be observed using a sundial. Sunset, also known as sundown, is the daily disappearance of the Sun below the horizon due to Earth's rotation. Dawn is the time that marks the beginning of twilight before sunrise. It is recognized by the appearance of indirect sunlight being scattered in Earth's atmosphere, when the centre of the Sun's disc has reached 18° below the observer's horizon. This morning twilight period will last until sunrise (when the Sun's upper limb breaks the horizon), when direct sunlight outshines the diffused light. Thanks for your support and do visit nitrio.com for more apps for your iOS devices.

Screenshots

Combat Clock 2a4 screens
Sun Calculator4 screens

Verdict

The call

The clearest difference is update cadence: Combat Clock 2a at every 6 days against Sun Calculator's every 48 months. Combat Clock 2a also leads on rating (4.4 vs 4.0) and review sentiment (70% vs 50%). On ads, in-app purchases, monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Combat Clock 2a costs $0.99 and Sun Calculator $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Combat Clock 2a holds the better App Store score, 4.4 against 4.0. That said, the two scores are not equally well evidenced: Combat Clock 2a has 36 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 70% of Combat Clock 2a's written reviews are positive against 50% of Sun Calculator's.

UpkeepUpdate frequency

Combat Clock 2a ships an update every 6 days, Sun Calculator every 48 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Combat Clock 2a versus Sun Calculator: the parameters behind the verdict, then further details
ParameterCombat Clock 2aSun Calculator
Price$0.99 — better$2.99
Rating4.4 (36 ratings) — better4.0 (4 ratings)
Positive reviews70.0% of reviews — better50.0% of reviews
Number of ratings36 — better4
Update frequencyEvery 6 days — betterEvery 48 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size13 MB9 MB
Age rating4+4+
DeveloperJOHN W GRANHOLMHeng Jia Liang

Customer experience

Combat Clock 2a

All ratings28 ratings
Positive85.7%
Neutral0.0%
Negative14.3%
Written reviews10 reviews
Positive70.0%
Neutral10.0%
Negative20.0%

Sun Calculator

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Combat Clock 2a

No in-app purchases

None

Sun Calculator

No in-app purchases

Questions

Is Combat Clock 2a free?
Combat Clock 2a costs $0.99, with no in-app purchases.
Is Sun Calculator free?
Sun Calculator costs $2.99, with no in-app purchases.
Which has better reviews, Combat Clock 2a or Sun Calculator?
Combat Clock 2a is rated higher. Combat Clock 2a averages 4.4 out of 5 from 36 ratings, while Sun Calculator averages 4.0 from 4 ratings.
Do Combat Clock 2a or Sun Calculator have ads?
Neither Combat Clock 2a nor Sun Calculator shows ads.
Which is updated more often, Combat Clock 2a or Sun Calculator?
Combat Clock 2a ships an update every 6 days, and Sun Calculator every 48 months. Most recently, Combat Clock 2a was updated on October 25, 2026 and Sun Calculator on October 24, 2026.

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