Calculator

about

description

A calculator and unit converter for keypad phones like the Qin F21, Dumber Mini or Doov R77 Pro. There are no on-screen buttons: you type the calculation straight on the keypad and press OK for the result. Touch is switched off inside the app, so nothing gets pressed by accident in your pocket. **Keys** • 0–9 – type numbers • * – add an operator, press it again for the next one (+ − × ÷) • Hold * – a palette of symbols laid out like the keypad: ^, √, parentheses, %, ± • # – decimal point • OK or Call – show the result • Back – delete the last character; hold it to clear everything • ↑ / ↓ – go through the history • ← / → – switch between Calculator, Unit converter and Settings **Features** • The usual order of operations and exact decimals (0.1 + 0.2 = 0.3) • History like a paper tape, cleared when you close the app • Unit converter for length, area, volume, mass, temperature, time, speed, pressure and energy, in both directions • Copy the result, or take a converted value over to the calculator • System, light, dark, dark red and custom themes, a keypad-friendly color picker, blue or any other icon color • No ads, no tracking, no internet access Based on Fossify Calculator (GPL-3.0), keypad input inspired by Calc-U-Later.

publisher

78ce6faa72264387284e647ba6938995735ec8c7d5c5a65737e55130f026307d

first seen

2026-10-15T16:10:36.647415+00:00

last event

2026-10-10 08:18 UTC

install

zapstore.dev or any Zapstore-compatible client

topics

#calculator #unit convertor

source & build

repository

https://github.com/lbockaj/dumberkit-calculator

arch flags

android-arm64-v8a android-armeabi-v7a android-x86 android-x86_64

manifest

missing

releases (kind 30063)

2 releases indexed; latest 1.1.0.

version	channel	released	event
1.1.0	main	2026-10-16 19:14 UTC	7e7eb680…
1.0.0	main	2026-10-10 08:18 UTC	760dbf93…

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.

1.1.0 — dumberkit-calculator.apk

sha256

dfcc7cb5138e6cb16fd5b95391550eb0113ae02a4449560ba3285f4180f7f63f

size

3.0 MB

archs

android-arm64-v8a, android-armeabi-v7a, android-x86, android-x86_64

version code

3

apk cert sha256

4b809126ab6d8f4c4a04a0514944b20a9313ddc9a33b830f6a4207a991c8809b

download

dumberkit-calculator.apk

1.0.0 — dumberkit-calculator.apk

sha256

2b0d5b63c48405ded8c4e803fbcc9432262c8c3cf53d6c95fd96bb457ae67671

size

3.0 MB

archs

android-arm64-v8a, android-armeabi-v7a, android-x86, android-x86_64

version code

2

apk cert sha256

4b809126ab6d8f4c4a04a0514944b20a9313ddc9a33b830f6a4207a991c8809b

download

dumberkit-calculator.apk

Showing the newest 2 asset descriptors; the full set is in /api/apps/78ce6faa…