# tValue

> Statistical calculator for unpaired and paired Student t values. (iPhone/iPad app by David Bourne.)

- Source: https://appshunter.io/ios/app/tvalue/id1082227470 (this page in markdown: same URL + `.md`)
- Developer: [David Bourne](https://appshunter.io/developer/1031086386)
- Category: Reference, Education
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.6 · 1 MB
- Languages: American English, French (France), German (Germany), Japanese, Korean, Chinese (Simplified, China), European Spanish, Thai
- Released: 2016-02-11
- Data updated: 2026-06-25
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/tvalue/id1082227470/reviews.md

## What is tValue?

tValue can be used to quickly calculate unpaired Student t Values given two sets of mean, standard deviation and n. t values for difference from zero or other specified value can be calculated. Use the difference values  for Set 1 and leave Set 2 blank for a paired t test.

## Key features

- Calculate unpaired Student t Values
- Calculate t values for difference from zero
- Calculate t values for difference from specified value
- Supports paired t tests
- Input mean, standard deviation, and n


## Frequently asked questions about tValue

### What is tValue used for?

tValue is used to quickly calculate unpaired Student t Values given two sets of mean, standard deviation, and n. It can also calculate t values for differences from zero or other specified values.

### How do I perform a paired t test with tValue?

To perform a paired t test, use the difference values for Set 1 and leave Set 2 blank. This allows the app to calculate the appropriate t value for paired data.

### What devices is tValue available on?

tValue is currently available on iPhone devices.

### How often is tValue updated?

The latest version of tValue was released on 2025-12-15, indicating regular updates from the developer.

### What is the age rating for tValue?

tValue has an age rating of 4+, making it suitable for a wide range of users.

### Does tValue have ads?

No, tValue does not contain advertisements.

### What is the user rating for tValue?

tValue has a perfect rating of 5.0 stars based on one user review.

### Is tValue free to use?

Yes, tValue is completely free to download and use, with no in-app purchases or ads.

## Version history (last 5 releases)

### 2.0.2 — 2025-12-15

Updated for new age questions and requirements

### 2.0.1 — 2023-08-05

Updated for iOS 16.0

### 2.0 — 2020-03-30

Updated using SwiftUI
Updated iOS 13.4

### 1.4 — 2018-11-05

Updated for iOS 12 and iPhones Xr, Xs, Xs Max

### 1.3 — 2018-07-17

Localization for France, Spanish, Germany, Japan, China (Simplified), Korea, Thailand
Please let me know if I've made a mistake with these translation or if additional translations can be added, e.g. for Std Dev or n, P or df.

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All apps by David Bourne: https://appshunter.io/developer/1031086386

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-25.*