250+ iOS apps curated and reviewed
Looking for free sample size calculator app? 15 of our 250+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | — | No | No | May 2026 |
| 2 |  | $0.99 | 3.5★ (2) | No | No | May 2026 |
| 3 |  | $1.99 | 5.0★ (1) | No | No | Jun 2026 |
| 4 |  | Free | — | No | No | Jul 2026 |
| 5 |  | Free | — | No | No | Aug 2026 |
| 6 |  | Free | 4.6★ (51K) | Yes | No | Aug 2026 |
| 7 |  | Free | — | No | Yes | Aug 2026 |
| 8 |  | Free | — | No | No | May 2026 |
This app calculates sample sizes for statistical studies. It dynamically adjusts the sample size based on user inputs for margin of error, confidence level, population size, and proportion.
This application simplifies sample size and study power calculations for various research designs. It offers tools for estimating population means and proportions, comparing groups, and analyzing different study types like case-control and randomized controlled trials. Results can be easily shared via email.
This app offers a user-friendly calculator with large buttons and extensive customization options. It features a dual-line display to see input and results simultaneously, saves your calculation history, and provides full scientific functions. Personalize layouts, themes, and even button symbols to suit your needs.
This tool simplifies instrumentation setup and scaling needs. It performs accurate conversions between process variables, 4-20mA signals, and percentages with an intuitive interface for quick calculations.
Enter mathematical formulas as text and get instant results. Review past calculations with a history feature for error checking and reuse. Supports advanced functions and constants, and can email your calculation history.
This advanced calculator app offers a powerful math core and algebra engine for basic to complex calculations. It includes features like step-by-step solutions, handwriting recognition, and 2D graphing, making it suitable for students, engineers, and programmers.
A free, classic calculator app with large, easy-to-press buttons and customizable skins. It supports basic arithmetic, memory functions, and can handle very large numbers without using scientific notation. Multitasking is also supported on compatible devices.
This app offers both basic and scientific calculators for quick solutions to mathematical expressions. It also features a "Math Notes" function that allows users to type or write out equations and see them solved inline, with support for variables and graphing.
This app offers a robust calculator experience with advanced features like printing and emailing calculation history, a backspace key for corrections, and customizable display options. It allows for easy copying and pasting of numbers to other applications and supports displaying calculations on external monitors.