# Flex Calculators — All-in-one math, daily life

> All-in-one math, daily life (iPhone/iPad app by An Le.)

- Source: https://appshunter.io/ios/app/flex-calculators/id6761326502 (this page in markdown: same URL + `.md`)
- Developer: [An Le](https://appshunter.io/developer/1863975090)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 15.1 · 37 MB
- Languages: American English
- Released: 2026-04-10
- Data updated: 2026-07-29
- User reviews in markdown: https://appshunter.io/ios/app/flex-calculators/id6761326502/reviews.md

## What is Flex Calculators?

Flex Calculators is a powerful all-in-one calculator app built for everyday problems and advanced math.

Use it as your daily calculator, then switch to specialized tools for equations, calculus, statistics, finance, time, and conversions.

Key features:

- Scientific calculator
  - Fast expression input and real-time result preview
  - History support for quick reuse
  - Configurable angle mode (degrees/radians)
  - Real-only or complex result handling

- Advanced math tools
  - Equation solver
  - System of equations and system of inequalities
  - Matrix calculator
  - Vector calculator
  - Derivatives and integrals
  - Statistics and distributions
  - Value table and proportion tools
  - Number base converter

- Unit converter
  - Convert across many categories including:
    length, mass, area, volume, temperature, time, speed,
    force, pressure, energy, power, electrical, light, sound,
    data, performance, chemistry, and biology

- Daily life calculators
  - Currency converter
  - Energy/fuel cost calculator
  - BMI/body index calculator
  - Loan payment calculator
  - Savings calculator
  - Date calculator
  - World hour/time-zone tool

- Personalization and display controls
  - Light, dark, or system theme
  - Custom theme color
  - Multi-language interface
  - Decimal precision setting
  - Number formatting options (including thousand separators)

- Ads and purchase
  - Banner/interstitial ads may be shown
  - One-time purchase option to remove ads

Why users choose Flex Calculators:
- One app for both basic and advanced calculations
- Clean workflow for study, engineering, and daily finance tasks
- Practical tools that reduce the need to install multiple calculator apps

Whether you need quick arithmetic, equation solving, conversions, or planning daily expenses, Flex Calculators helps you solve it faster.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |



## Version history (last 3 releases)

### 1.0.2 — 2026-04-30

fix calculator screen

### 1.1 — 2026-04-10

Bug fixes and stability improvements, including a fix for ads not showing on certain screens.

### 1.0 — 2026-04-10

No release notes.

## More apps by An Le

- [Câu đố địa lý Việt Nam](https://appshunter.io/ios/app/cau-o-ia-ly-viet-nam/id6760547026)

All apps by An Le: https://appshunter.io/developer/1863975090

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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 2026-07-29.*