# Builder's Formulator vs MobileSTAR

The clearest difference is in-app purchases: MobileSTAR at none against Builder's Formulator's 1. MobileSTAR also leads on review sentiment (9% vs 0%) and iOS requirement (13.0 vs 26.4). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Builder's Formulator sells 1 one-off in-app purchase. MobileSTAR asks for nothing beyond the download.

Builder's Formulator ships an update every 2 months, MobileSTAR monthly. The most recent releases landed on October 8, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Builder's Formulator | MobileSTAR |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (3 ratings)](https://appshunter.io/ios/app/builders-formulator/id306247596/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | **8.7% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | Free | Free |
| Size | 48 MB | 54 MB |
| Requires iOS | 26.4 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Historycentral.com](https://appshunter.io/developer/1744330560) | [Blackbay](https://appshunter.io/developer/844295115) |

## What reviewers say

### Builder's Formulator

[App page](https://appshunter.io/ios/app/builders-formulator/id306247596)

This comprehensive tool provides over 2,600 formulas, code charts, and technical drawings for construction professionals. It covers calculations for structural engineering, electrical, plumbing, HVAC, and financial aspects of building projects. Includes unit conversions and ADA accessibility references.

**Highlights:** Over 2,600 formulas, Plumbing code charts, Technical drawings, ADA accessibility references, Unit conversions, Save and revisit calculations, Mark favorites

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Builder Pro | $2.99 | one-time |


### MobileSTAR

[App page](https://appshunter.io/ios/app/mobilestar/id959346103)

This app enhances last-mile delivery efficiency by enabling real-time tracking and management of goods throughout the collection and delivery process. It offers features like proof of delivery, scanning, and two-way communication to ensure timely and accurate deliveries.

**Highlights:** Real-time track and trace, Proof of delivery (POD), Scanning capabilities, Despatching and routing, Two-way driver-consignee communication, Customizable functionality

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Builder's Formulator free?

Builder's Formulator is free to download, with in-app purchases available.

### Is MobileSTAR free?

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

### Do Builder's Formulator or MobileSTAR have ads?

Neither Builder's Formulator nor MobileSTAR shows ads.

### Which is updated more often, Builder's Formulator or MobileSTAR?

Builder's Formulator ships an update every 2 months, and MobileSTAR monthly. Most recently, Builder's Formulator was updated on October 8, 2026 and MobileSTAR on October 11, 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.*