install

Additional install commands

macOS

Homebrewverified · 100%

brew install fend

local Homebrew formula metadata

MacPortsverified · 94%

sudo port install fend

MacPorts ports tree · math/fend/Portfile · source: api.github.com

Linux

Nixverified · 92%

nix profile install nixpkgs#fend

nixpkgs package indexes · pkgs/by-name/fe/fend/package.nix · source: api.github.com

Windows

Scoopverified · 92%

scoop install main/fend

Scoop official bucket manifest trees · bucket/fend.json · source: api.github.com

Windows Package Managerverified · 92%

winget install --id printfn.fend -e

Windows Package Manager source index · printfn.fend · source: cdn.winget.microsoft.com

overview

Package summary

Arbitrary-precision unit-aware calculator

Project links

Commands and aliases

fend

history

Project history and usage

fend is an arbitrary-precision, unit-aware calculator available as a CLI, web app, Rust crate family, WebAssembly package, and packaged desktop/server-side tool.

Project history

The GitHub release history starts with v0.1.0 on 2020-08-31. Early releases built up the calculator core, REPL behavior, history handling, terminal color, configuration support, and unit operations.

By 2022, fend had added automatic currency exchange-rate downloads and file input. Later releases expanded into custom units, decimal separator options, roman numerals, number-to-words conversion, scripting-oriented print functions, web UI improvements, and more reliable exchange-rate sourcing.

The 1.x series remains active. The changelog lists v1.5.8 on 2026-01-24, with fixes and improvements around TLS defaults, the interactive clear command, significant-figure rounding, pi precision, currency conversions, Turkish lira aliases, variable serialization, and performance.

Adoption history

The official README documents package-manager installation through Homebrew, MacPorts, AUR, AOSC OS, Void Linux xbps, Nix, Cargo, Windows Package Manager, Chocolatey, Scoop, and Pkgx, alongside manual binaries from GitHub releases.

fend also appears beyond the CLI: the README lists the web interface, npm WebAssembly packages, a Telegram bot, and projects using fend such as MicroPad, Fendesk, metasearch2, FendApp, and Asleh.

How it is used

fend is used as a REPL or one-shot calculator for exact arithmetic, complex numbers, units, base conversion, dice notation, variables, trigonometric functions, strings, custom units, currency conversion, and small scripts.

The manual documents a CLI configuration file at OS-specific paths, with options for colors, history length, prompt text, internet access, exchange-rate source, decimal separator style, custom units, and related behavior. It also stores command history under the user's state directory by default.

Why package nerds care

fend is the sort of package nerds like because it replaces a pile of ad hoc shell, Python, bc, units, and browser-tab calculations with one small executable that understands dimensions and keeps exact arithmetic where possible.

It also shows a modern packaging pattern for Rust tools: a single core used by CLI, web, Wasm, bot, and package-manager distributions, with release notes that track both mathematical correctness and platform packaging details.

Timeline

2020: v0.1.0 released on 2020-08-31.
2021: CLI config file support added.
2022: Up-to-date currency exchange-rate support added.
2023: Custom units in ~/.config/fend/config.toml added.
2024: Web UI rewrite, roman numerals, number-to-words, and locale-oriented decimal separator support land across 1.4.x releases.
2026: v1.5.8 released on 2026-01-24.

Related projects

GNU units and Qalculate are adjacent unit-aware calculator tools.
bc, dc, and shell arithmetic cover narrower command-line calculator niches.
fend-wasm and the fend web interface reuse the same project in browser and JavaScript-package contexts.

Sources

security posture

Risk level: green

narrow executable package without higher-risk signals.

Risk classifier

green risk · low confidence · appliance

Why

narrow executable package without higher-risk signals

Signals

metadata:no-higher-risk-signals

Install behavior

No Homebrew post-install hook is recorded in formula metadata.
Homebrew bottle metadata is available for 6 platform targets.
Build metadata lists 3 build dependencies.

Recommended review

Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.

executables

Installed executables

Command	Kind	Exposure	Note
`fend`	cli	global executable

freshness

Version and freshness

These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.

page generated2026-07-08

manager version1.5.8

manager updated2026-06-22

local dataok

upstreamcurrent

latest detectedv1.5.8

https://github.com/printfn/fend

okNo freshness warnings were generated.

install metadata

Package metadata

Package key	brew:fend
Version	1.5.8
Package manager	Homebrew
Package manager page	https://formulae.brew.sh/formula/fend
Homepage	https://printfn.github.io/fend
Repository	https://github.com/printfn/fend
Upstream docs	https://github.com/printfn/fend#readme
License	MIT
Source archive	https://github.com/printfn/fend/archive/refs/tags/v1.5.8.tar.gz
Last updated	2026-06-22T14:03:19-07:00
Pulse	updated
Build dependencies	pandoc, pkgconf, rust
Bottle	available (on arm64_linux, arm64_sequoia, arm64_sonoma, arm64_tahoe, sonoma, x86_64_linux)
Homebrew post-install	not defined
Service	none declared

registry facts

Source database details

Source Database	Homebrew formula API
Tap	homebrew/core
Full Name	fend
Version Scheme	0
Revision	0
Head Version	HEAD
Bottle Stable Root URL	https://ghcr.io/v2/homebrew/core
Deprecated	no
Disabled	no
Keg Only	no
URL Keys	head stable

source database matches

Other package-manager records

Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.

Nix95%

fend

nix profile install nixpkgs#fend

normalized package name match
Matched by: Fend

nixpkgs package indexes · api.github.com · nixpkgs package indexes: pkgs/by-name/fe/fend/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

MacPorts95%

fend

sudo port install fend

normalized package name match
Matched by: Fend

MacPorts ports tree · api.github.com · MacPorts ports tree: math/fend/Portfile from https://api.github.com/repos/macports/macports-ports/git/trees/master?recursive=1

Scoop95%

main/fend

scoop install main/fend

normalized package name match
Matched by: Fend

Scoop official bucket manifest trees · api.github.com · Scoop official bucket manifest trees: bucket/fend.json from https://api.github.com/repos/ScoopInstaller/Main/git/trees/master?recursive=1

winget95%

printfn.fend

winget install --id printfn.fend -e

normalized package name match
Matched by: Fend

Windows Package Manager source index · cdn.winget.microsoft.com · Windows Package Manager source index: printfn.fend from https://cdn.winget.microsoft.com/cache/source.msix

package graph

Links come from deterministic package relationships, av.db category and tag curation, ecosystem matches, and package hub membership.

source trail

Generated from repository data

This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.

Combined YAML source

View the package source record on GitHub.

combined/fend.yml

Used sources

Geiger risk classifier
Nucleus package database
av.db category and tag curation
cross-ecosystem install command graph
curated package history
external package-manager database matches
package relationship graph
package version freshness
package-page enrichment

Install fend with Homebrew, MacPorts, Nix, scoop, winget