138+ iOS apps curated and reviewed
Every iPhone needs a few good sample size apps. We benchmark 138+ 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 |  | $0.99 | 3.5★ (2) | No | No | Sep 2026 | |
| 2 |  | $1.99 | 5.0★ (1) | No | No | Jun 2026 | |
| 3 |  | Free | 4.3★ (6) | No | No | Oct 2026 | |
| 4 |  | Free | 5.0★ (1) | No | No | Oct 2026 | |
| 5 |  | Free | 4.2★ (1.8K) | No | Yes | Oct 2026 | |
| 6 |  | Free | 4.5★ (4.3K) | No | Yes | Nov 2026 | |
| 7 |  | Free | 4.0★ (4) | No | Yes | May 2026 | |
| 8 |  | Free | 4.9★ (530K) | Yes | No | Nov 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 tool helps marketers and researchers calculate sample size requirements and confidence intervals. It offers customizable startup screens and explanations of research terms.
