Calculator · Android

The answer shows up as you type.

Calculator for Android. 128 × 24 is already 3,072. There is no equals key.

Download Calculator

Version 1.0.1 · 22.4 MB · 20 Oct 2026 · APK

Calculator on a phone, showing 128 × 24 and the result 3,072.

How it calculates

The large number is the result while you type.
AC starts over.
The next operator continues from that result.

Price per GB

Open it from the calculator: + once, − twice, × three times, ÷ four times, then hold 0 for three seconds.
The two fields sit above the mode buttons, and those buttons stay just above the keyboard while you type.
The price turns euros into gigabytes, or the other way around.

Install

The browser warning is expected. This file is not from the Play Store.
Allow this browser to install unknown apps.
Open the file and confirm.

SHA-256

6affadfe3a196ee1dc716d7dbe06fbb3fc92e517c6540c20e52492d8251c1923

A matching hash means this download arrived whole. It does not prove who signed the file.

On this phone

Calculations stay on the phone. There is no account. An update check contacts Expo, and a new install file is fetched from this site. The privacy notice has the detail.

Privacy

This notice covers Calculator for Android, published by Bobbis Systems. Package name com.bobbissystems.calculator.

What stays on the phone

The numbers you type and the result stay on the device. Calculator has no account, no ads, and no payment.

What the app contacts

An update check requests a manifest from Expo at u.expo.dev.
A check for a new install file requests the APK metadata from apps.bobbis-systems.online.

The website that serves the APK is a static page. It sets no cookies.

Connection logs

Those requests can be recorded by the servers as the IP address, the time, and the address requested. Bobbis Systems does not keep an account database. There is no account to delete.

Terms

Calculator is free, from Bobbis Systems. These terms cover the Android app and the APK offered on apps.bobbis-systems.online.

You may install and use Calculator. You may not present the app or the APK as your own product.

The app is provided as-is. Bobbis Systems does not promise that it will be free of errors, or that updates will continue.

Open-source notices

Calculator includes the following software. Each is used under the MIT license.

React — Copyright Meta Platforms, Inc. and affiliates — MIT
React Native — Copyright Meta Platforms, Inc. and affiliates — MIT

The MIT license

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.