Builder's Formulator vs MobileSTAR
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Builder's Formulator
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.
- Over 2,600 formulas
- Plumbing code charts
- Technical drawings
- ADA accessibility references
- Unit conversions
- Save and revisit calculations
- Mark favorites
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Builder's Formulator is the ultimate professional reference tool for general contractors, builders, plumbers, HVAC technicians, and electricians. With over 2,600 formulas, 136 plumbing code charts, 27 technical drawings, and complete ADA accessibility references, it's the most comprehensive construction calculator available. CONSTRUCTION — Calculate joists, studs, headers, hardwood flooring costs, concrete and excavation volumes, bricks needed for a wall, roofing materials, stair dimensions, lumber requirements, and acoustic absorption. Includes material weight references for dozens of building materials. STRUCTURAL ENGINEERING — Comprehensive beam analysis for single-span and cantilevered beams with point loads, uniform loads, and triangular loads. Concrete design for flexure, shear, axial compression, and prestressed concrete. Masonry stress analysis, steel design, wood design, flat plate calculations, soil bearing capacity, and road/highway formulas. ELECTRICAL — Calculate kilowatts, horsepower, efficiency, power factor, watts, amps, resistance, and voltage. Includes transformer calculations, voltage drop analysis, motor sizing, battery calculations, AC/DC circuits, Ohm's Law, impedance, frequency conversions, and UPS sizing. PLUMBING & HVAC — Pipe sizing, flow velocity, friction loss, pressure calculations, drainage and venting, storm drainage, gas piping, water heater sizing and recovery, pump horsepower, septic and sewage systems, grease interceptors, thermal expansion, water supply sizing, medical gas piping, and swimming pool calculations. Boiler efficiency, condensation, and comprehensive water flow analysis. HVAC SYSTEMS — Dedicated ductwork and duct sizing, fan laws, pump laws, gas laws, hydronic formulas, psychrometrics, ventilation rates, heating design, refrigeration, steam systems, air change rate equations, humidity calculations, and heating/cooling load analysis. FINANCIAL — Mortgage calculations, depreciation, investment analysis, interest formulas, debt ratios, and price quotes. REFERENCE LIBRARY — 136 plumbing code charts and tables covering gas piping, drainage, venting, backflow prevention, medical gas, thermal expansion, fixture units, and more. 27 technical drawings for venting systems, chimney terminations, gas clearances, and water heater installations. Complete ADA accessibility reference with 52 diagrams and 17 documents covering wheelchair dimensions, grab bars, ramps, parking, elevators, and restroom clearances. Plus built-in reference tables for occupancy loads, brick sizes, lumber dimensions, wire gauge, concrete mixes, and insulation R-values. CONVERSIONS — Hundreds of unit conversions across pressure, volume, linear measure, area, weight, flow, power, BTU, and eight temperature scales including Celsius, Fahrenheit, Kelvin, and Rankine. FEATURES — Save and revisit calculations, mark favorites for quick access, toggle between US and metric units, export and share results, and view your complete calculation history. Dark mode interface designed for jobsite readability. Builder's Formulator — one app for every trade on the job.
MobileSTAR
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.
- Real-time track and trace
- Proof of delivery (POD)
- Scanning capabilities
- Despatching and routing
- Two-way driver-consignee communication
- Customizable functionality
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Enhancing efficiency in last mile delivery, the latest release of MobileSTAR is powered by e2open's logistics application framework. MobileSTAR helps to create smarter delivery companies by allowing them to track and manage goods throughout the entire collection and delivery process, ensuring first time, on time, every time deliveries. The framework underpinning MobileSTAR allows customers to take immediate advantage of pre-configured MobileSTAR applications built from E2open's knowledge and expertise of the T&L market. These applications include real-time track and trace, proof of delivery (POD), scanning, despatching, on the road, routing and scheduling capabilities, and active two-way communication between the consignee and delivery driver. In addition to making it easy for customers to hit the ground running with the deployment of pre-configured applications, E2open understands that one size does not always fit all. The framework allows E2open customers to quickly make functionality changes to existing E2open applications to match their individual business processes. The framework has been developed so that screens, process flows and logic are all driven by configuration and can be deployed at runtime. Another important ease-of-use capability allows users to quickly and seamlessly switch between applications. In order to download configurations please contact E2open. Contact us today to find how MobileSTAR can transform your operations. Disclaimer: Continued use of GPS running in the background can dramatically decrease battery life.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Builder's Formulator | MobileSTAR |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (3 ratings) — better | — |
| Positive reviews | 0.0% of reviews | 8.7% of reviews — better |
| Number of ratings | 3 — better | — |
| Update frequency | Every 2 months | Monthly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.4 | 13.0 — better |
| Further details — not scored | ||
| Size | 48 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Historycentral.com | Blackbay |
Customer experience
Builder's Formulator
MobileSTAR
In-app purchases
Builder's Formulator
- Builder Pro$2.99
MobileSTAR
No in-app purchases






