250+ iOS apps curated and reviewed
Out of 250+ grade calculator plumbin daily apps on iOS, 18 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | — | Yes | Yes | May 2026 |
| 2 |  | Free | 4.9★ (409K) | Yes | No | Aug 2026 |
| 3 |  | $4.99 | — | No | No | Jul 2026 |
| 4 |  | Free | — | Yes | No | Aug 2026 |
| 5 |  | Free | 4.7★ (47) | Yes | Yes | Aug 2026 |
| 6 |  | Free | 4.4★ (18) | Yes | Yes | Jul 2026 |
| 7 |  | Free | 4.5★ (146K) | Yes | Yes | Aug 2026 |
| 8 |  | Free | — | No | Yes | Jul 2026 |
This utility app offers a clean and intuitive interface for performing calculations. It prioritizes a user-friendly design with large buttons and a clear display for quick and efficient use.
This app offers a comprehensive suite of calculators for everyday tasks and advanced mathematical needs. It includes tools for finance, unit conversion, health, and time calculations, all within a user-friendly interface.
This app simplifies concrete volume calculations for professionals and DIYers. It offers flexible unit support and a free rectangular slab calculator, with advanced features available via subscription.
This app offers a comprehensive suite of 15 calculators for everyday and scientific needs. Easily perform basic arithmetic, complex scientific functions, and specialized calculations like sales tax, age, and loan payments. It also includes a robust unit converter for various measurements.
This utility app offers a straightforward calculation experience with a vast selection of over 80 customizable themes. Personalize your calculator's appearance to suit your style while performing everyday math tasks.
This app provides professional construction calculations and conversions for contractors and DIYers. It offers tools for feet and inches, metric measurements, material estimation, and advanced construction tasks like roof pitch and stair layouts. Simplify your jobsite work with accurate and fast results.
This app provides specialized calculators for construction professionals, including concrete, rebar, and area/volume calculations. It offers material quantity estimation, unit conversion, and professional features like BOQ export and project organization. Designed for contractors, builders, and engineers on job sites worldwide.
A straightforward calculator app designed for everyday math, school, budgeting, and shopping. It offers essential functions, a clear interface with large buttons, and a history log for reviewing past calculations. Advanced features include memory functions, percentage calculations, and multi-window support for efficient workflow.
This app offers essential on-the-go technical calculators for plumbing professionals. It includes tools for expansion/contraction and temperature de-rating, with more features planned for future updates.
This professional calculator app provides over 200 formulas, calculators, and reference materials for plumbers, HVAC technicians, and mechanical contractors. It covers a wide range of calculations for water flow, piping, drainage, water heaters, pumps, and more, all in one pocket-sized tool.
Calculate fluid flow rate and pressure loss in pipes. This app helps engineers determine pipe diameter, maximum pipe length, and friction loss for both liquid and gas flows, including fittings and elevation changes. Results can be shared as Excel or PDF reports.
This tool assists pipe fitters, welders, and engineers in calculating pipe welding layouts, fit-ups, angles, and offsets. It offers a simple interface for precise calculations, saving time and improving accuracy in fabrication and construction.
