# Star Fort Builder vs ChemBench

The clearest difference is in-app purchases: Star Fort Builder at none against ChemBench's 4. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ChemBench sells 4 one-off in-app purchases. Star Fort Builder asks for nothing beyond the download.

Star Fort Builder ships an update every 9 days, ChemBench every 6 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Star Fort Builder | ChemBench |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/star-fort-builder/id6795415904/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 6 days** |
| Monetization | Free | — |
| Size | 381 MB | 8 MB |
| Requires iOS | **15.1** | 16.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Felicity Enterprises LLC](https://appshunter.io/developer/1883166758) | [献慧 陈](https://appshunter.io/developer/1896370005) |

## What reviewers say

### Star Fort Builder

[App page](https://appshunter.io/ios/app/star-fort-builder/id6795415904)

Explore a comprehensive reference and design system for historical star forts. Browse detailed information on 104 documented fortifications and design your own using classic military engineering principles.

**Highlights:** 104 historical star fort profiles, GPS coordinates and measurements, Aerial photography, Design your own star forts, Mathematical design systems (Vauban, Coehoorn)

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

**In-app purchases:** none


### ChemBench

[App page](https://appshunter.io/ios/app/chembench-equation-balancer/id6813808389)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Intro Answers | $0.99 | one-time |
| Core Answers | $1.99 | one-time |
| Brainer Answers | $2.99 | one-time |
| Pro Lifetime | $4.99 | one-time |


## Frequently asked questions

### Is Star Fort Builder free?

Star Fort Builder is free to download, with no in-app purchases.

### Is ChemBench free?

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

### Do Star Fort Builder or ChemBench have ads?

Neither Star Fort Builder nor ChemBench shows ads.

### Which is updated more often, Star Fort Builder or ChemBench?

Star Fort Builder ships an update every 9 days, and ChemBench every 6 days. Most recently, Star Fort Builder was updated on October 31, 2026 and ChemBench on October 31, 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.*