# SunSim Building vs Marryflow 备婚助手

The clearest difference is update cadence: Marryflow 备婚助手 at weekly against SunSim Building's every 3 weeks. SunSim Building's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.4). On price, ads and in-app purchases there is nothing between them.

Both are free to download. SunSim Building sells 3 in-app purchases, starting at $4.99 per month and Marryflow 备婚助手 sells 2 in-app purchases, starting at $3.99 per year. Whichever you choose, the download price is not the number that matters.

SunSim Building ships an update every 3 weeks, Marryflow 备婚助手 weekly. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | SunSim Building | Marryflow 备婚助手 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/sunsim-building-sun-tracker/id6479755082/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 60.9% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 200 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [立娜 王](https://appshunter.io/developer/1761096632) | [思瑞 周](https://appshunter.io/developer/1891189058) |

## What reviewers say

### SunSim Building

[App page](https://appshunter.io/ios/app/sunsim-building-sun-tracker/id6479755082)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $4.99 | per month |
| Annual Subscription | $12.99 | per year |
| Permanent membership | $24.99 | one-time |


### Marryflow 备婚助手

[App page](https://appshunter.io/ios/app/marryflow/id6762294226)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Marryflow 年度订阅 | $3.99 | per year |
| Marryflow 永久会员 | $3.99 | one-time |


## Frequently asked questions

### Is SunSim Building free?

SunSim Building is free to download, with in-app purchases available.

### Is Marryflow 备婚助手 free?

Marryflow 备婚助手 is free to download, with in-app purchases available.

### Do SunSim Building or Marryflow 备婚助手 have ads?

Neither SunSim Building nor Marryflow 备婚助手 shows ads.

### Which is updated more often, SunSim Building or Marryflow 备婚助手?

SunSim Building ships an update every 3 weeks, and Marryflow 备婚助手 weekly. Most recently, SunSim Building was updated on November 4, 2026 and Marryflow 备婚助手 on November 9, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*