# OneTap - Calculator & Alarm

> All-in-One Calculator & quiz alarm clock with extra features

Canonical page: [https://chrome-stats.com/d/calculator.nsstudio.app](https://chrome-stats.com/d/calculator.nsstudio.app)

## Overview

- **ID:** `calculator.nsstudio.app`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** CuongLam
- **Category:** TOOLS
- **Downloads:** 25,134
- **Version:** 2.2.1
- **Last updated:** 2025-09-22
- **First published:** 2024-11-29
- **Publisher country:** VN
- **Size:** 49 MB
- **Data as of:** 2026-09-12
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=calculator.nsstudio.app)
- **Website:** [https://qchinese.net/](https://qchinese.net/)
- **Privacy policy:** [https://github.com/quoccuong042009/OneTap-Simple-Calculator/blob/main/privacy-policy.md](https://github.com/quoccuong042009/OneTap-Simple-Calculator/blob/main/privacy-policy.md)

## Description

OneTap is an all-in-one Chrome extension that integrates a powerful calculator with a unique quiz alarm clock designed to help heavy sleepers wake up reliably. It supports basic arithmetic, scientific calculations, and specialized tools such as income tax calculation tailored to India, tip calculation and bill splitting, currency conversion with real-time rates, loan payment calculation, and unit conversions. The quiz alarm feature requires solving math problems to dismiss, ensuring you start your day alert.

Beyond calculations, OneTap offers a money manager for expense tracking and budgeting, making it a versatile utility for both daily financial management and time management. Its alarmy functionality allows tracking wake-up times even if the phone is off. Please note, tax calculations are indicative and users should consult a tax advisor for official filing. OneTap is not affiliated with any government agency.

## Rankings

- #397,066 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_CUSTOM_AUDIENCE`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.ACCESS_NOTIFICATION_POLICY`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK`
- `android.permission.INTERNET`
- `android.permission.POST_NOTIFICATIONS`
- `android.permission.READ_EXTERNAL_STORAGE`
- `android.permission.RECEIVE_BOOT_COMPLETED`
- `android.permission.SCHEDULE_EXACT_ALARM`
- `android.permission.USE_EXACT_ALARM`
- `android.permission.USE_FULL_SCREEN_INTENT`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `calculator.nsstudio.app.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`
- `com.android.vending.BILLING`
- `com.android.vending.CHECK_LICENSE`
- `com.google.android.c2dm.permission.RECEIVE`
- `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE`
- `com.google.android.gms.permission.AD_ID`

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Source: [Chrome-Stats](https://chrome-stats.com/d/calculator.nsstudio.app)