# SunSim Building vs Zantomed

The clearest difference is in-app purchases: Zantomed at none against SunSim Building's 3. SunSim Building's advantage is update cadence (every 3 weeks vs every 3 months) and iOS requirement (13.0 vs 15.6). On price, ads and device support there is nothing between them.

Both are free to download. SunSim Building sells 3 in-app purchases, starting at $4.99 per month. Zantomed asks for nothing beyond the download.

SunSim Building ships an update every 3 weeks, Zantomed every 3 months. Both last shipped on November 4, 2026.

## The numbers

| Metric | SunSim Building | Zantomed |
| --- | --- | --- |
| 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 | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 38 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [立娜 王](https://appshunter.io/developer/1761096632) | [石家庄禾柏生物技术股份有限公司](https://appshunter.io/developer/1158751283) |

## 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 |


### Zantomed

[App page](https://appshunter.io/ios/app/zantomed/id6612011198)

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

**In-app purchases:** none


## Frequently asked questions

### Is SunSim Building free?

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

### Is Zantomed free?

Zantomed is free to download, with no in-app purchases.

### Do SunSim Building or Zantomed have ads?

Neither SunSim Building nor Zantomed shows ads.

### Which is updated more often, SunSim Building or Zantomed?

SunSim Building ships an update every 3 weeks, and Zantomed every 3 months. Most recently, SunSim Building was updated on November 4, 2026 and Zantomed on November 4, 2026.

---

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