Numio Calculator
A clean, open-source calculator with live results and unit conversion
New in version 1.0.7
- Fixed a crash when switching converter categories (for example Volume to Temperature)
- Converter shows "Number too large" or "Not a number" instead of crashing or staying blank, and accepts a comma as the decimal point (1,5)
- Converter result stays visible above the keyboard
- Landscape: the result is no longer hidden and key labels fit their buttons
- Custom colour: codes like GGGGGG now show an error
- Results like 0.1 + 0.2 now show 0.3
- Converter shows "Number too large" or "Not a number" instead of crashing or staying blank, and accepts a comma as the decimal point (1,5)
- Converter result stays visible above the keyboard
- Landscape: the result is no longer hidden and key labels fit their buttons
- Custom colour: codes like GGGGGG now show an error
- Results like 0.1 + 0.2 now show 0.3
Numio is a clean, minimal calculator built with Kotlin and Jetpack Compose. No ads, no tracking, no internet permission — it never needs to talk to the outside world.
Features:
* Clean, minimal design with retro circular keys
* Live results — see the answer as you type
* Scrollable expression display, so long numbers are never truncated
* Calculation history saved locally with a Room database
* Built-in unit converter — Length, Weight, Area, Volume, Temperature, Time, Speed, Pressure
* Theme customization — 12 preset accent colors plus custom hex input
* Your chosen theme color is remembered across sessions
* Hand-drawn custom app icon
* A small hidden easter egg
* 100% offline — nothing ever leaves your device
This is a first solo project, built from scratch and open-sourced so anyone can use, inspect, or contribute to it.
Features:
* Clean, minimal design with retro circular keys
* Live results — see the answer as you type
* Scrollable expression display, so long numbers are never truncated
* Calculation history saved locally with a Room database
* Built-in unit converter — Length, Weight, Area, Volume, Temperature, Time, Speed, Pressure
* Theme customization — 12 preset accent colors plus custom hex input
* Your chosen theme color is remembered across sessions
* Hand-drawn custom app icon
* A small hidden easter egg
* 100% offline — nothing ever leaves your device
This is a first solo project, built from scratch and open-sourced so anyone can use, inspect, or contribute to it.
- Author: rag-creation
- License: GNU General Public License v3.0 only
- Issue Tracker
- Source Code
- Changelog
- Build Metadata
- Reproducibility Status
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Versions
Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.
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arm64-v8aarmeabi-v7ax86x86_64This version requires Android 7.0 or newer.
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Download APK 1.4 MiB PGP Signature | Build Log