Schulrechner

about

description

<b>This is a very early version in development. Unlabeled buttons will be implemented in the future, and bugs may be frequent. If you experience issues or have feature requests, please file an issue (link below).</b> Frustrated by the lack of free, open-source scientific calculators that feel like the ones I am used to, I decided to reverse-engineer my old calculator from school. With features like: - input of complex equations, - output as fractions as well as decimals, - result storage and reuse, - selection and editing of equations from input history, - and support for implicit multiplication (like 5π instead of 5*π), this calculator produces math that looks like the math on your paper. That makes it much more suitable for higher-level math in school and university—especially if you've grown accustomed to this kind of interface from a young age and just forgot your calculator at home. Some additional features include: - A well-established open-source math.js library as the math engine—so you’re not relying on some sketchy, hand-rolled math logic (just my sketchy hand-rolled input method 😛) - A familiar, intuitive design - 100% offline usability and fully open source - Written entirely in HTML, JS, and CSS, which means: + inherently cross-platform and also available as a website and Flatpak + easy for other web developers to contribute + admittedly a bit heavy for a calculator. If you're interested in helping make a lighter version (Flutter, Kotlin, etc.), you're very welcome!

publisher

78ce6faa72264387284e647ba6938995735ec8c7d5c5a65737e55130f026307d

first seen

2026-10-09T00:44:54.968390+00:00

last event

2026-07-08 07:17 UTC

install

zapstore.dev or any Zapstore-compatible client

source & build

repository

https://github.com/cardijey/schulrechner

arch flags

android-arm64-v8a

manifest

missing

releases (kind 30063)

1 release indexed; latest 1.15.1.

assets & verification

Every app, release and asset event is schnorr-verified (NIP-01 id + signature) before it enters the catalog, and assets are content-addressed by sha256. We subscribe read-only to the catalog relay — never write to it.

1.15.1 — app-release.apk

sha256

c2ce54627bc47279a977413ea2e4862e45e0867ea6f8e8aa9a0948a161e35616

size

3.3 MB

archs

android-arm64-v8a

version code

11501

apk cert sha256

9d1c7e9cb1b3a30cc39f95eb96865c14dc2f36c077b00a33f0b61712f42671b3

download

app-release.apk

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