# BRISTOL - Calculator — Calculator: Basic & Scientific

> Calculator: Basic & Scientific (iPhone/iPad app by Christopher Britton.)

- Source: https://appshunter.io/ios/app/bristol-calculator/id1509732291 (this page in markdown: same URL + `.md`)
- Developer: [Christopher Britton](https://appshunter.io/developer/1509732288)
- Category: Utilities, Education
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 14.7 · 3 MB
- Languages: English
- Released: 2020-05-05
- Data updated: 2026-05-14
- User reviews in markdown: https://appshunter.io/ios/app/bristol-calculator/id1509732291/reviews.md

## What is BRISTOL?

The Bristol Calculator provides a platform for both simple and more technical calculations involving vectors, matrices and complex numbers.

Separate input and output screens with touch cursor control facilitates editing and checking.

Option settings provide control over the output and input screen presentation. 

Keys can be  personalised for often used functions and variable names. Data entry is also possible from the hardware keyboard as well as the calculator's screen keypad.

Help pages provide built in contextual help.

Work can be saved and templates created for future calculations.

Vectors, matrices and complex numbers are handled by the same basic function operators used for numbers; the context determining operation.

As well as standard mathematical functions,  bespoke routines for sums, products, matrix inversion, numerical integration and solving transcendental equations are included.

User functions can also be created.

Table and graph plot functions display results.

The free version of the Bristol calculator allows two files to be stored. A modest one-off In-App purchase unlocks this restriction. Otherwise, the free version is fully functional.

This is a standalone application and there are no links to advertisers or third party software.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| bristol calculator storage | $3.99 | one-time |



## Version history (last 5 releases)

### 3.38 — 2024-06-18

Inbuilt help files updated.

### 3.36 — 2024-05-28

Minor extension to implied multiplication caters for single imaginary characters with righthand curly brackets directly to either side.

### 3.35 — 2024-05-11

Facilitates data exchange with spreadsheets. Pasteboard export and paste commands allow transfer of output screen tables and matrices to a spreadsheet (requires iOS16+). Correspondingly, spreadsheet tables insert as matrices on the input screen.

### 3.32 — 2023-12-08

Greater flexibility on index operator format, intelligent transpose and index operator discrimination plus ambiguity detection alerts.

### 3.30 — 2023-11-03

Functions added for extracting rows and columns from a matrix plus minimum and maximum values from a set.

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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 2026-05-14.*