Comparison

SunSim Building vs Sunlight Sim

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

Head to head
About

SunSim Building

This tool helps analyze home sun exposure using 3D modeling and solar trajectory simulation. It visualizes sunlight data, calculates duration, and generates reports for property evaluation. Features include floor plan and map modeling, unit layout simulation, and window view analysis.

Highlights
  • 3D modeling from floor plans or maps
  • Solar trajectory simulation
  • Sunlight duration statistics
  • 3D heatmap display
  • Window view simulation
  • Report generation (PDF, PNG, CSV)
Features
Read full description

【Sunlight Calculator - Home Sun Exposure Analysis Tool】 Sunlight Calculator is a professional home sun exposure analysis tool that helps you objectively evaluate lighting conditions when choosing a property. Through 3D modeling and solar trajectory simulation, it provides visualized sunlight data for your reference. Core Features 【Multiple Modeling Methods】 Floor Plan Modeling: Import residential community floor plans to quickly build a 3D model Map Modeling: Select the community location on a map to automatically obtain geographic coordinates Building Spacing Modeling: Enter building spacing and height parameters to simulate shading conditions Unit Layout Simulation: Simulate sunlight distribution and shadow changes at different times of day on the floor plan Model Editing: Adjust floor height, building orientation, and other parameters Save & Share: Models can be saved locally or shared with family and friends 【Professional Sun Exposure Analysis】 Solar Trajectory Simulation: Display the sun's path at any date and time throughout the year Sunlight Duration Statistics: Calculate cumulative daily sunlight hours at each location Time-Period Analysis: View lighting conditions in the morning, afternoon, and throughout the full day Winter/Summer Comparison: Compare lighting differences on key dates such as the winter and summer solstices Sampling Point Analysis: Select specific locations to view detailed sunlight data Dynamic Playback: Play full-day sunlight change animations to intuitively understand lighting patterns 【3D Heatmap Display】 Color Grading: Red–orange–yellow–green–blue gradient representing lighting from excellent to poor Layer-by-Layer Display: View sunlight distribution for each floor individually Multi-Building Comparison: Display heatmaps for multiple buildings simultaneously for easy side-by-side comparison Precision Settings: Adjust calculation precision to balance speed and accuracy Data Labeling: Display sunlight duration values directly on the 3D model 【Window View Simulation】 Perspective Switching: Simulate the field of view looking outward from different floors Obstruction Analysis: Show the degree to which buildings ahead obstruct the view Landscape Assessment: Determine whether greenery, water features, and other scenic resources are visible Floor Comparison: Compare view differences across different floors Distance Measurement: Calculate the actual distance from a window to the building ahead Height Annotation: Display the relationship between line-of-sight height and the height of obstructing structures 【Report Generation & Export】 Single-Floor Report: Generate a detailed sun exposure analysis report for an individual floor Batch Reports: Generate comparison reports for multiple buildings or floors with a single tap Multiple Formats: Supports export as PDF, PNG image, or CSV data spreadsheet Custom Templates: Choose from different report styles and content modules Print Optimization: PDFs are automatically paginated to fit standard A4 paper Sunlight Calculator is dedicated to providing users with an objective, professional sun exposure analysis tool helping you gather more data-backed insights during the home selection process and make smarter. Download now and start your sunlight analysis. Auto-Renewable Subscription: - Monthly: auto-renews every month - Yearly: auto-renews every year - Lifetime: one-time purchase - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period - Manage subscriptions in Settings → Apple ID → Subscriptions Terms of Use: https://jiahe365.top/sunshine-web/legal/membership_agreement_en.html Privacy Policy: https://jiahe365.top/sunshine-web/legal/privacy_en.html

About

Sunlight Sim

Features
Read full description

See your next home in real daylight — before you sign. An open house shows you one moment. Sunlight Sim shows you the whole day — and all four seasons. Take a photo of the room. Seconds later, see how sun and shadow move through the windows: bright in the morning, softer by afternoon, lower in winter, longer in summer - or no direct sunlight at all? Why Sunlight Sim? Many homes look radiant at noon — then turn surprisingly dark after 4 p.m. Or the kitchen gets almost no direct sun in winter. Sunlight Sim helps you spot those surprises early: when renting, buying, or comparing several places. Agents use it to help clients decide faster with clear, visual light reports. How it works 1. Capture or import a photo — Camera or library. Time, location, and compass heading are read from metadata when available. 2. Configure the room — Window direction, map pin, seasons and times. Nearby buildings from inform shading. 3. Run the simulation — On-device sun position, incidence angle, and occlusion. Then AI generates realistic interior lighting — same furniture and window frames, new light. 4. Explore results — Up to a 16-image grid (4 seasons × 4 times of day), light score per cell, full-screen viewer with time chips. 5. Save & share — History by address and room, export to Photos, PDF summary via AirDrop or Mail. What you get • Year-round preview — Spring, summer, autumn, winter in one consistent view • Full day — Morning, noon, afternoon, evening • Physics, not guesswork — Astronomical sun position, window orientation, building shadowing • Your room, your geometry — Always starts from your photo — not stock imagery • Organize by place — Multiple addresses, light scores per room at a glance • Works offline for saved work — Stored results and on-device math; generation needs internet Pay fairly — no subscription No monthly fee. Buy credits when you need images. One credit = one generated image. A full room with all 16 combinations = 16 credits. Credits never expire. You are only charged for successfully rendered images. Who it’s for • Renters and first-time buyers • Anyone choosing between several homes • Realtors and architects who need fast, shareable light reports Privacy Photos are processed only to fulfill your request, are not used for model training, and are not kept on our servers. Your history stays on your device. On accuracy Sun timing and direction use established calculations (GPS, date, window, surroundings) — typically within a very short time. Images are AI-rendered to show realistic light on your photo; they are not a guaranteed lux measurement.

Screenshots

SunSim Building4 screens
Sunlight Sim4 screens

Verdict

The call

The clearest difference is device support: SunSim Building at 3 against Sunlight Sim's 1. SunSim Building also leads on iOS requirement (13.0 vs 26.0). 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. SunSim Building sells 3 in-app purchases, starting at $4.99 per month and Sunlight Sim sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
SunSim Building versus Sunlight Sim: the parameters behind the verdict, then further details
ParameterSunSim BuildingSunlight Sim
PriceFreeFree
Rating4.7 (3 ratings) — better—
Positive reviews60.9% of reviews—
Number of ratings3 — better—
Update frequencyEvery 3 weeks—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better26.0
Further details — not scored
Size36 MB13 MB
Age rating4+4+
Developer立娜 王Dear Friend Digital GmbH

In-app purchases

3 purchases

SunSim Building

Subscriptions2
  • Monthly Subscription$4.991 Month
  • Annual Subscription$12.991 Year
One-time1
  • Permanent membership$24.99
4 purchases

Sunlight Sim

One-time4
  • 16 Credits$3.99
  • 40 Credits$7.99
  • 100 Credits$17.99
Show 1 more
  • 240 Credits$34.99

Questions

Is SunSim Building free?
SunSim Building is free to download, with in-app purchases available.
Is Sunlight Sim free?
Sunlight Sim is free to download, with in-app purchases available.
Do SunSim Building or Sunlight Sim have ads?
Neither SunSim Building nor Sunlight Sim shows ads.

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