211+ iOS apps curated and reviewed
Every iPhone needs a few good belt tension calculator apps. We benchmark 211+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | May 2026 |
| 2 |  | Free | 2.5★ (20) | No | No | Jul 2026 |
| 3 |  | $4.99 | 3.5★ (2) | No | No | Jul 2026 |
| 4 |  | $0.99 | 4.5★ (11) | No | No | Jul 2026 |
| 5 |  | Free | 4.7★ (60K) | No | No | Jul 2026 |
| 6 |  | Free | 4.7★ (15K) | Yes | Yes | Jul 2026 |
| 7 |  | Free | 4.7★ (12K) | Yes | Yes | Jul 2026 |
| 8 |  | Free | 4.7★ (3.2K) | No | Yes | Jul 2026 |
This app uses your phone's microphone to measure the sonic vibration frequency of a belt drive. It helps you determine if your bicycle belt tension needs adjustment by comparing the frequency to a provided chart. It also offers a calculator for bicycle belt drive parameters like speed ratio and center distance.
This utility app uses your phone's microphone to measure belt tension by analyzing audio frequencies. It provides instant measurements, supports multiple belt segments, and averages results for accuracy. Ideal for professionals and enthusiasts needing precise belt installations.
Calculate key parameters for a two-pulley system. Input pulley sizes, speed, power, and distance to determine belt velocity, tension, torques, wrap angle, and driven pulley RPM. Supports both imperial and metric units.
This app offers both basic and scientific calculation modes with over 30 scientific operations. It allows for customization of the app's appearance and includes features for note-taking, drawing, and viewing calculation history. It supports high accuracy calculations and nested parentheses.
This app offers a customizable and fast calculator experience with a wide variety of themes. It includes scientific and standard modes, real-time results, and calculation history. Personalize your math with over 60 cute and colorful themes, including animated options.
This app is a powerful scientific calculator with graphing capabilities, a formula library, and a unit converter. It offers natural display input, advanced math functions for algebra, calculus, and statistics, and supports various number bases and formats.
This app provides a straightforward calculator experience with a comprehensive history log of all your computations. Customize the keyboard, display, and history records to suit your needs. Easily add annotations and titles to past calculations for better organization.
This app offers a powerful graphing calculator experience with touch-based input for enhanced interaction. It supports natural textbook notation, advanced math functions, and various plotting capabilities. Users can also utilize its programming features and built-in tools like unit conversion and a periodic table.
This app offers a versatile calculator experience with both standard and scientific modes. Customize its appearance, use it in any orientation, and access additional tools like a notes tab and calculation history. It's designed for students and professionals needing accurate calculations.
This app calculates the correct fusion pressure for HDPE and Polypropylene pipe jobs. It simplifies the process by selecting your fusion machine and entering pipe details to determine the recommended theoretical gauge pressure.
This application provides a comprehensive diagnostic tool for belt drive systems. It measures key parameters like pulley speeds, belt frequency, tension, and system geometry to ensure optimal performance, energy efficiency, and extended service life.
A powerful calculator designed for professionals and students, offering advanced features like RPN mode, multi-line display, and extensive unit conversions. It supports various number systems and includes an Apple Watch app for on-the-go calculations.
This app helps you determine the correct weld parameter settings for optimal results. It guides you through a few simple questions to tune your welding machine for TIG, Stick, or MIG processes.
Calculate the necessary length for drive system belts with this utility. Supports both open and cross belt arrangements, requiring only pulley diameters and center length for accurate results.
This engineering calculator helps determine belt length, ratio, RPM, and belt speed for pulley systems. It offers instant calculations with copyable results and includes formulas for reference.
This reference tool helps engineers, designers, and purchasing agents calculate various spring parameters. It supports compression, extension, and torsion springs, offering detailed stress charting and material selection.
