Comparison

Sun Calculator vs TBPS Lite

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

Head to head
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.

About

TBPS Lite

Features
Read full description

TBPS is a versatile three-body problem simulator that allows you to explore the fascinating and mysterious dynamics of three-body phenomena. Whether you're an observer marveling at the unpredictable motions of celestial objects or a creator designing unique universes by tweaking various parameters, TBPS offers a compelling experience. Learn more about the three-body problem in mathematics and physics by visiting https://en.wikipedia.org/wiki/Three-body_problem or explore its depiction in literature through the acclaimed novel *The Three-Body Problem* by Liu Cixin at [https://en.wikipedia.org/wiki/The_Three-Body_Problem_(novel)](https://en.wikipedia.org/wiki/The_Three-Body_Problem_(novel)).

Screenshots

Sun Calculator4 screens
TBPS Lite3 screens

Verdict

The call

The clearest difference is price: TBPS Lite at Free against Sun Calculator's $2.99. TBPS Lite also leads on update cadence (weekly vs every 48 months). On ads, 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

CostPrice · In-app purchases · Ads · Monetization

TBPS Lite is free to download; Sun Calculator costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Sun Calculator ships an update every 48 months, TBPS Lite weekly. The most recent releases landed on September 20, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
Sun Calculator versus TBPS Lite: the parameters behind the verdict, then further details
ParameterSun CalculatorTBPS Lite
Price$2.99Free — better
Rating4.0 (4 ratings) — better—
Positive reviews50.0% of reviews—
Number of ratings4 — better—
Update frequencyEvery 48 monthsWeekly — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.012.0
Further details — not scored
Size9 MB32 MB
Age rating4+4+
DeveloperHeng Jia LiangWu Bin

In-app purchases

None

Sun Calculator

No in-app purchases

None

TBPS Lite

No in-app purchases

Questions

Is Sun Calculator free?
Sun Calculator costs $2.99, with no in-app purchases.
Is TBPS Lite free?
TBPS Lite is free to download, with no in-app purchases.
Do Sun Calculator or TBPS Lite have ads?
Neither Sun Calculator nor TBPS Lite shows ads.
Which is updated more often, Sun Calculator or TBPS Lite?
Sun Calculator ships an update every 48 months, and TBPS Lite weekly. Most recently, Sun Calculator was updated on September 20, 2026 and TBPS Lite on October 9, 2026.

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