Builder's Formulator vs eCrimp
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.
eCrimp
Access the latest crimp specifications for hydraulic and industrial hose products. Quickly find the necessary details to create factory-quality hose assemblies for your customers.
- Up-to-date crimp specifications
- Hydraulic hose data
- Industrial hose data
- Factory-quality assembly guidance
- Quick spec lookup
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Gates eCrimp is an innovative app that enables users and distributors of Gates hydraulic and industrial hose products to find the most up-to-date crimp specifications quickly and easily. With just a few taps, you'll have all the specs necessary to provide your customers with factory-quality hose assemblies.
Screenshots
Verdict
The clearest difference is review sentiment: eCrimp at 50% against Builder's Formulator's 0%. eCrimp also leads on rating (4.6 vs 2.0) and in-app purchases (none vs 1). 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. eCrimp asks for nothing beyond the download.
eCrimp holds the better App Store score, 4.6 against 2.0. Both are backed by a comparable volume of ratings — 3 and 11 respectively. Written reviews point the same way: 0% of Builder's Formulator's written reviews are positive against 50% of eCrimp's.
Builder's Formulator ships an update every 2 months, eCrimp every 3 months. Both last shipped on October 8, 2026.
| Parameter | Builder's Formulator | eCrimp |
|---|---|---|
| Price | Free | Free |
| Rating | 2.0 (3 ratings) | 4.6 (11 ratings) — better |
| Positive reviews | 0.0% of reviews | 50.0% of reviews — better |
| Number of ratings | 3 | 11 — better |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.4 | 12.0 — better |
| Further details — not scored | ||
| Size | 48 MB | 74 MB |
| Age rating | 4+ | 4+ |
| Developer | Historycentral.com | Gates Corporation |
Customer experience
Builder's Formulator
eCrimp
In-app purchases
Builder's Formulator
- Builder Pro$2.99
eCrimp
No in-app purchases






