# SunSim Building vs riceflow

The clearest difference is in-app purchases: riceflow at none against SunSim Building's 3. riceflow also leads on update cadence (weekly vs every 3 weeks). SunSim Building's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

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

SunSim Building ships an update every 3 weeks, riceflow weekly. The most recent releases landed on September 23, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | SunSim Building | riceflow |
| --- | --- | --- |
| 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 | 63.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 36 MB | 96 MB |
| Requires iOS | **13.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [立娜 王](https://appshunter.io/developer/1761096632) | [Thanh Hoang Van](https://appshunter.io/developer/1875932462) |

## 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 |


### riceflow

[App page](https://appshunter.io/ios/app/riceflow/id6760111913)

**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 riceflow free?

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

### Do SunSim Building or riceflow have ads?

riceflow shows ads; SunSim Building does not.

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

SunSim Building ships an update every 3 weeks, and riceflow weekly. Most recently, SunSim Building was updated on September 23, 2026 and riceflow on September 16, 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.*