# Aviation Tools vs Custom Formulas

The clearest difference is review sentiment: Custom Formulas at 100% against Aviation Tools's 50%. Custom Formulas also leads on update cadence (every 5 days vs every 33 months). Aviation Tools's advantage is price ($1.99 vs $3.99) and iOS requirement (13.0 vs 15.4). On ads, in-app purchases, monetization model and device support there is nothing between them.

Aviation Tools costs $1.99 and Custom Formulas $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Aviation Tools ships an update every 33 months, Custom Formulas every 5 days. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Aviation Tools | Custom Formulas |
| --- | --- | --- |
| Price | **$1.99** | $3.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/custom-formulas/id1623368630/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 33 months | **Every 5 days** |
| Monetization | Paid | Paid |
| Size | 22 MB | 1 MB |
| Requires iOS | **13.0** | 15.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jorge Gonzalez Galvan](https://appshunter.io/developer/915982572) | [Anthony Dunk](https://appshunter.io/developer/704471943) |

## What reviewers say

### Aviation Tools

[App page](https://appshunter.io/ios/app/aviation-tools/id1271017562)

This app consolidates essential aviation tools for pilots, including time calculators, unit converters, and extensive databases of Jeppesen and FAA abbreviations, definitions, and NOTAMs. It also features a wind correction calculator for landing performance.

**Highlights:** Time Calculator for logbooks and flight times, Unit Converter for aviation standards, Jeppesen Symbols and Definitions database, Extensive FAA and ICAO Abbreviations, NOTAMs database, Wind Correction Calculator

**Features:** macOS Compatibility

**In-app purchases:** none


### Custom Formulas

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

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


## Frequently asked questions

### Is Aviation Tools free?

Aviation Tools costs $1.99, with no in-app purchases.

### Is Custom Formulas free?

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

### Do Aviation Tools or Custom Formulas have ads?

Neither Aviation Tools nor Custom Formulas shows ads.

### Which is updated more often, Aviation Tools or Custom Formulas?

Aviation Tools ships an update every 33 months, and Custom Formulas every 5 days. Most recently, Aviation Tools was updated on October 12, 2026 and Custom Formulas on October 5, 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.*