# Calculator - 15 Calculators — Calculator for iPhone

> A versatile calculator app with 15 specialized tools and a unit converter. (iPhone/iPad app by RV AppStudios LLC.)

- Source: https://appshunter.io/ios/app/calculator-15-calculators/id1609183107 (this page in markdown: same URL + `.md`)
- Developer: [RV AppStudios LLC](https://appshunter.io/developer/340181308)
- Category: Utilities
- Price: Free with in-app purchases
- Rating: 4.39/5 from 18 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.0 · 30 MB
- Languages: Catalan, Croatian, Czech, Danish, Dutch, English, Finnish, French, German, Greek and 20 more
- Released: 2023-01-09
- Data updated: 2026-07-17
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/calculator-15-calculators/id1609183107/reviews.md

## What is Calculator?

Do you calculate manually? Bored with your in-built Calculator App? Download this Calculator app and do math calculations easily. With this app, you can smoothly enter your data and get results quickly. With the best calculator app around, relax and do your calculations accurately. This all in one calculator app is going to be your go-to choice for everyday use.

Apart from doing fundamental arithmetic operations like addition, subtraction, multiplication, and division, you can do scientific calculations too. If you are looking for a simple calculator along with a scientific calculator, which gives accurate results up to 10 decimal places, this app is among the best calculator app for you.

Get the most out of your Unit converter by quickly and easily converting between multiple units of measurement. This unit converter is the perfect tool for converting between units of length, area, volume, speed, temperature, mass, pressure, and more. With a simple and intuitive design, it's easy to use and makes converting units a breeze.

* List of calculators that you get in this app:

- Classic Calculator: This calculator allows you to perform addition, subtraction, multiplication, and division as well as advanced mathematical calculations.
- Scientific Calculator: Do advanced mathematical calculations like logarithmic & trigonometric functions easily.
- Sales Tax calculator: Find out before-tax price and final or after-tax price.
- Age calculator: Calculate age in years, months, days, or minutes!
- Tip calculator: Learn how much you and your friends should leave for a tip, instantly!
- Discount calculator: Save money by calculating discounts rapidly and accurately.
- Fuel calculator: Enter travel distance, fuel efficiency, and fuel price to know how much your trip will cost.
- Fuel Efficiency: Enter mileage before and after fueling to see how efficiently your car uses gas.
- Savings calculator: Calculate the savings easily with the best savings calculator.
- Loan Calculator: It helps to calculate the monthly payments, interest cost, and total amount to be repaid on a loan over a specified period of time.
- Health Calculator: It will calculate the BMI based on height and weight, and BMR which represents the number of calories their body needs to function at rest.
- Ovulation Calculator: Predicts fertility window by calculating the date of ovulation for tracking menstrual cycles and optimizing chances of conception.
- GPA Calculator: Calculates Grade Point Average (GPA) based on inputted grades and credits for easy academic performance tracking.
- Unit Price Calculator: Calculates unit price for comparison shopping by dividing total cost by quantity.
- GST Calculator: It will help individuals or businesses determine the amount of GST payable on specific items.
- Unit Converter: Easily convert any quantity from one unit into other: length, weight, temperature, speed, density, pressure, etc. It is very helpful during construction work.
- World Time: Displays current time in different time zones around the world for easy global time tracking.
- Numeral System: Converts numbers between different numeral systems (e.g., decimal, binary, hexadecimal) for easy numerical conversions.

* Features:
- Perform basic arithmetic (addition, subtraction, multiplication, division)
- Add parentheses and math operators
- Scientific Calculator including Logarithm, Integer, Radian etc. functions
- View calculation history with the history log
- Edit and correct data before calculating
- Copy the calculated result to the clipboard for easy access
- Option to choose from various themes
- Easy to read numbers due to clear display format
- Share calculations and results easily with others

When you go for this calculator app download, not only do your calculations become easier and more accurate but also it helps save your precious time!

## Key features

- 15 specialized calculators
- Scientific calculation functions
- Unit converter for length, area, volume, and more
- Sales tax, age, and tip calculators
- Loan, savings, and fuel calculators
- Health and GPA calculators
- World time display

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/calculator-15-calculators/id1609183107/reviews.md

### 2/5 — Egg

*2025-04-25*

Egg

### 1/5 — Might Be Good,  But Full Page Ads One After Another!

*2024-12-10*

After downloading I attempted to try this calculator,  but had one full page ad after another. Maybe this app is good,  but I could never try it because of the ads. Just not worth my time.

## Frequently asked questions about Calculator

### Does Calculator - 15 Calculators have ads?

Yes, Calculator - 15 Calculators contains advertisements. These ads help support the development and maintenance of the app.

### What calculators are included in Calculator - 15 Calculators?

Calculator - 15 Calculators includes a Classic Calculator, Scientific Calculator, Sales Tax calculator, Age calculator, Tip calculator, Discount calculator, Fuel calculator, Fuel Efficiency calculator, Savings calculator, Loan Calculator, Health Calculator, Ovulation Calculator, GPA Calculator, Unit Price Calculator, GST Calculator, Unit Converter, and World Time.

### What is the accuracy of Calculator - 15 Calculators?

The app provides accurate results up to 10 decimal places for its calculations.

### What devices does Calculator - 15 Calculators support?

Calculator - 15 Calculators is available for iPhone and iPod devices.

### How often is Calculator - 15 Calculators updated?

The latest version of Calculator - 15 Calculators is 1.1.3, and it was last updated on September 22, 2025.

### What is the age rating for Calculator - 15 Calculators?

Calculator - 15 Calculators has an age rating of 4+, making it suitable for a wide range of users.

### What are the in-app purchase options for Calculator - 15 Calculators?

Calculator - 15 Calculators offers in-app purchases, though specific details about what these purchases entail are not provided in the description.

### Can Calculator - 15 Calculators perform unit conversions?

Yes, Calculator - 15 Calculators features a comprehensive Unit Converter that can convert between various units of length, area, volume, speed, temperature, mass, pressure, and more.

## Version history (last 5 releases)

### 1.1.3 — 2025-09-22

iOS 26 Ready + Sleek Liquid Glass Design

Your all-in-one Calculator is now even better with full iOS 26 support. Perform everyday, scientific, and advanced calculations with smoother performance on the latest devices, while the Liquid Glass interface brings enhanced clarity and a modern look for a refined experience.

Here’s what’s new:

- Full compatibility with iOS 26 for reliable performance
- Liquid Glass effects for a clearer, modern interface
- Enhanced readability and smoother interaction across all calculators
- General bug fixes and performance improvements

### 1.1.2 — 2025-02-13

Experience ultimate convenience with our latest update! Enjoy seamless unit conversions, a detailed calculation history browser, and more - all for free! Plus, improved speed and performance for a smoother experience.

What's New:
- Enhanced app speed
- Bug fixes and performance improvements

Update now and simplify your calculations!

### 1.1.1 — 2024-09-18

What's New:
• Optimized app performance for a smoother experience
• Improved speed and fixed bugs for better functionality

Update now to enjoy these enhancements and make your tasks even easier!

### 1.1.0 — 2024-07-01

Experience unparalleled convenience with our latest update! We've added a host of new features and enhancements to make your life easier. From smooth unit conversions to a user-friendly calculation history browser, everything you need is here. And the best part? It's all free! Download now and effortlessly streamline your tasks.

What's New:
- Enhanced app performance
- Boosted speed and resolved bugs

### 1.0.9 — 2024-02-12

Discover a whole new level of convenience with our latest update! Explore a range of new features and improvements aimed at making your life easier. From effortless unit conversions to a handy calculation history browser, we've got everything you need. And the best part? It's all free! Get it now and simplify your tasks effortlessly.

What's New:
- Faster app performance
- Improved performance and bug fixes

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All apps by RV AppStudios LLC: https://appshunter.io/developer/340181308

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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 2026-07-17.*