# Custom Formulas vs Formula Calculator #

The clearest difference is price: Formula Calculator # at Free against Custom Formulas's $3.99. Formula Calculator # also leads on iOS requirement (12.0 vs 15.4). Custom Formulas's advantage is in-app purchases (none vs 4) and ads (none vs shown). On rating, review sentiment, ratings volume and device support there is nothing between them.

Formula Calculator # is free to download; Custom Formulas costs $3.99 up front. Formula Calculator # sells 4 one-off in-app purchases. Custom Formulas asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for Custom Formulas against 5.0 for Formula Calculator #. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Custom Formulas ships an update every 5 days, Formula Calculator # every 5 weeks. The most recent releases landed on September 18, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | Custom Formulas | Formula Calculator # |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/custom-formulas/id1623368630/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/formula-calculator/id6504839903/reviews) |
| Number of ratings | 1 | **2** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 days** | Every 5 weeks |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#186** | — |
| Size | 1 MB | 67 MB |
| Requires iOS | 15.4 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Anthony Dunk](https://appshunter.io/developer/704471943) | [威 刘](https://appshunter.io/developer/1465235012) |

## What reviewers say

### Custom Formulas

[App page](https://appshunter.io/ios/app/custom-formulas/id1623368630)

**Currently charting:** #186 Top Paid · Utilities (US App Store)

This utility app allows users to create and manage complex calculations with multiple inputs and outputs. Formulas can be linked, grouped into categories, and customized for display precision. Share your custom calculations easily via email.

**Highlights:** Multiple input/output formula support, Linked formulas via variable names, Formula categorization, Customizable variable display order, Adjustable output decimal precision, Email formula sharing

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

**In-app purchases:** none


### Formula Calculator #

[App page](https://appshunter.io/ios/app/formula-calculator/id6504839903)

Perform calculations with a vast library of built-in formulas or create your own. Save and sync custom formulas to the cloud for easy access across devices. Includes a comprehensive scientific calculator.

**Highlights:** Extensive built-in calculation formulas, Create and save custom formulas, Cloud synchronization for custom formulas, Share custom formulas with others, Comprehensive scientific calculator

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 month subscription | $1.49 | one-time |
| 3 months subscription | $2.49 | one-time |
| 6 months subscription | $3.49 | one-time |
| 1 year subscription | $4.49 | one-time |


## Frequently asked questions

### Is Custom Formulas free?

Custom Formulas costs $3.99, with no in-app purchases.

### Is Formula Calculator # free?

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

### Which has better reviews, Custom Formulas or Formula Calculator #?

Custom Formulas and Formula Calculator # are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.

### Do Custom Formulas or Formula Calculator # have ads?

Formula Calculator # shows ads; Custom Formulas does not.

### Which is updated more often, Custom Formulas or Formula Calculator #?

Custom Formulas ships an update every 5 days, and Formula Calculator # every 5 weeks. Most recently, Custom Formulas was updated on September 18, 2026 and Formula Calculator # on September 14, 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.*