# Quick Formula Calculator vs App One

The clearest difference is in-app purchases: App One at none against Quick Formula Calculator's 1. App One also leads on ads (none vs shown) and update cadence (weekly vs monthly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Quick Formula Calculator sells 1 one-off in-app purchase. App One asks for nothing beyond the download.

Quick Formula Calculator ships an update monthly, App One weekly. The most recent releases landed on October 5, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Quick Formula Calculator | App One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/quick-formula-calculator/id6754241699/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Monthly | **Weekly** |
| Monetization | Free with in-app purchases | — |
| Size | 32 MB | 10 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [庆鸿 林](https://appshunter.io/developer/1558629938) | [Zhicheng Jiang](https://appshunter.io/developer/6805649735) |

## What reviewers say

### Quick Formula Calculator

[App page](https://appshunter.io/ios/app/quick-formula-calculator/id6754241699)

Create custom calculators for any purpose, from academic studies to financial planning. Define variables, functions, and units for precise results. Organize and save your formulas with ease, and access a built-in date calculator for planning.

**Highlights:** Build custom calculators, Define variables and units, Use common math functions, Organize formulas with tags, Automatic calculation history, Built-in date calculator

**Features:** macOS Compatibility, Family Sharing, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Membership | $9.99 | one-time |


### App One

[App page](https://appshunter.io/ios/app/app-one-student-workspace/id6805649733)

**In-app purchases:** none


## Frequently asked questions

### Is Quick Formula Calculator free?

Quick Formula Calculator is free to download, with in-app purchases available.

### Is App One free?

App One is free to download, with no in-app purchases.

### Do Quick Formula Calculator or App One have ads?

Quick Formula Calculator shows ads; App One does not.

### Which is updated more often, Quick Formula Calculator or App One?

Quick Formula Calculator ships an update monthly, and App One weekly. Most recently, Quick Formula Calculator was updated on October 5, 2026 and App One on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*