# OneTap - Calculator & Alarm — Simple Calculator & Alarm

> All-in-one calculator and alarm clock with advanced features. (iPhone/iPad app by Cuong Lam.)

- Source: https://appshunter.io/ios/app/onetap-calculator-and-alarm/id6739255251 (this page in markdown: same URL + `.md`)
- Developer: [Cuong Lam](https://appshunter.io/developer/1590726807)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 1 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.0 · 69 MB
- Languages: English
- Released: 2024-12-15
- Data updated: 2026-07-06
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/onetap-calculator-and-alarm/id6739255251/reviews.md

## What is OneTap?

Are you tired of juggling multiple calculators for different tasks? Not able to wake up to your morning alarm?
This is a comprehensive all in one calculator app and alarm clock that can handle a wide range of calculations, from basic arithmetic to complex scientific functions.
It is also a great tool for financial calculator, converting units, calculating tips, and solving math problems. It also offers a powerful feature for setting your morning alarm, solving quiz alarm to make sure you wake up on time, suitable for heavy sleepers.
With this app, you can manage your daily calculation, calculate tips, solve math problems, and wake up refreshed and on time.
- Basic calculator: Add, subtract, multiply, and divide numbers with ease. Support Scientific calculator, performing advanced calculations using trigonometric functions, logarithms, and more.
- Simple alarm clock: Set your alarm with ease and solve math alarm quiz to wake up on time. Use the snooze function to catch a few extra minutes of sleep when needed.
- Income tax calculator: calculate income tax india helping you with income tax e-filing with ease made specific for India income tax. Ensure you have the best tax saving.
- Tip calculator: Calculate the tip and total bill for your restaurant meals, split bill with friends.
- Currency converter: Convert between hundreds of different currencies with real-time exchange rates.
- Loan calculator: Calculate your monthly payments for loans of all types.
Unit converter: Convert between different units of measurement, such as length, weight, volume, and temperature.
Plus, this app features alarmy functionality, so you can track your wake-up time, even if your phone is off. Whether you’re calculating or setting up your wake time, this app is the ideal companion for managing your time.
Disclaimer:
- The calculator aims at hiving an indication about what would the estimated tax be under new regime and old regime resp. and which regime is better for the individual with given details
- split bill with friends: ultimate bill splitter, simply add all expenses and split bill with a tap of a button. No worries about complex split bill functions, we will handle all the work.
- Money manager:  better manage your expenses, provide wise budget option and recording payment
- Not all Income tax provision are considered in the calculator to make it crisp and less complicated
- Tax actually calculated while filing the return of income would differ from the one used in calculator because all the provisions of the act are not covered in the calculator
- The calculator does not indicate an advise of any manner. User is advised to consult his/her tax advisor for legal filing and tax calculation purpose
- The calculator does not indicate an advise of any manner. User is advised to consult his/her tax advisor for legal filing and tax calculation purpose
- This app, 'Onetap - calculator & alarm', does not represent any Government entity and has no affiliation with any Government or Income Tax Department. 

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://github.com/quoccuong042009/OneTap-Simple-Calculator/blob/main/privacy-policy.md

## Key features

- Basic and scientific calculator
- Quiz alarm for waking up
- Income tax calculator (India)
- Tip and bill splitter
- Currency converter
- Loan and unit converter

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly | $9.99 | per year |
| Weekly | $0.99 | per 7 days |


## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/onetap-calculator-and-alarm/id6739255251/reviews.md

### 5/5 — Nice n easy

*2025-02-16, version 1.2.5*

more function than normal calculator, good work

### 5/5 — Better improvement

*2025-02-15, version 1.2.4*

The app was first doesnt have much function but getting better with more practical calculation

### 5/5 — easy to use. love it!!

*2024-12-15, version 1.0.4*

this app is great n useful.

### 5/5 — Simple

*2024-12-15, version 1.0.4*

Simple app to use currency converter

## Frequently asked questions about OneTap

### What can OneTap - Calculator & Alarm do?

OneTap - Calculator & Alarm offers a wide range of functionalities including basic and scientific calculations, a tip calculator, currency conversion, loan calculations, unit conversions, and a quiz alarm to help you wake up.

### Does OneTap - Calculator & Alarm have ads?

No, OneTap - Calculator & Alarm is ad-free, providing an uninterrupted user experience for all its features.

### Is OneTap - Calculator & Alarm free to use?

Yes, OneTap - Calculator & Alarm is free to download and use. It offers optional subscription plans for enhanced features.

### What are the subscription options for OneTap - Calculator & Alarm?

OneTap - Calculator & Alarm offers a weekly subscription for $0.99 and a yearly subscription for $9.99, which includes a 3-day free trial.

### What devices does OneTap - Calculator & Alarm support?

OneTap - Calculator & Alarm is available for iPhone and iPod devices.

### How often is OneTap - Calculator & Alarm updated?

The latest version of OneTap - Calculator & Alarm is 2.2.1, and it was last updated on September 23, 2025, indicating regular updates.

### What is the age rating for OneTap - Calculator & Alarm?

OneTap - Calculator & Alarm has an age rating of 4+, making it suitable for a wide range of users.

### Can OneTap - Calculator & Alarm help with Indian income tax?

Yes, OneTap - Calculator & Alarm includes an income tax calculator specifically for India, assisting with estimations for tax filing.

## Version history (last 5 releases)

### 2.2.1 — 2025-09-23

- fix bugs.

### 2.2.0 — 2025-09-01

- fix bugs.

### 2.1.2 — 2025-08-10

- fix bugs.

### 2.1.1 — 2025-07-25

- fix bugs.

### 2.1.0 — 2025-07-07

- Add money manager feature.
- Add Split bill feature.
- Fix bugs.

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## More apps by Cuong Lam

- [QChinese](https://appshunter.io/ios/app/qchinese/id1590726805)

All apps by Cuong Lam: https://appshunter.io/developer/1590726807

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-06.*