250+ iOS apps curated and reviewed
Every iPhone needs a few good n4studies apps. We benchmark 250+ 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 |  | $1.99 | 5.0★ (1) | No | No | Jun 2026 | |
| 2 |  | Free | — | No | No | May 2026 | |
| 3 |  | $7.99 | 3.0★ (1) | No | No | Sep 2026 | |
| 4 |  | Free | 1.7★ (3) | No | No | May 2026 | |
| 5 |  | Free | — | Yes | No | May 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | — | No | Yes | Aug 2026 | |
| 8 |  | Free | 2.5★ (2) | No | No | May 2026 |
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 simplifies sample size and study power calculations for various research designs. It offers tools for regression, survival analysis, diagnostic studies, and more, helping users find calculations in minutes.
