Aviation Tools vs Custom Formulas
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Aviation Tools
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.
- 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
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Aviation Tools is a brand new app made for pilots by pilots that includes multiple famous aviation apps in just one single app. Aviation Tool App includes the next features: Time Calculator (Allows to see all the times in a single list where you can edit-erase a single hour:minute line, perfect tool when adding or subtracting your log book times). This calculator also allows you to calculate your flight time for every single flight by entering your departure (Zulu Time) and arrival (Zulu Time). Unit Converter: This App allows to convert the most common units using in the aviation industry like: Temperature, Distance, Speed, Weight, Pressure. Jeppesen Symbols and definitions: This app includes more than 397 Images with definition. (Fast Search Engine) Jeppesen Abbreviations: This app includes more than 655 Jeppesen abreviations with definition. (Fast Search Engine) FAA Abbreviations: This app includes more than 1837 FAA abreviations with definition. (Fast Search Engine) PIA Abbreviations (Spanish): This app includes more than 1100 PIA (ICAO – Spanish) abbreviations with definitions. (Fast Search Engine) FAA – ICAO – Notams: This app includes more than 357 FAA-ICAO Notams with definition. (Fast Search Engine) Aviation Dictionary: This app includes more than 429 Aviation Terms with full detailed explanation and references. (Fast Search Engine) Wind Correction APP: This app offers a quick tool to calculate Headwind – Tailwind – Crosswind components and Wind Corrections Calculations for landing performance. All the Abbreviations-Dictionary Apps offers a Quick Search Tool that allows to find what you are looking for really fast.
Custom Formulas
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.
- Multiple input/output formula support
- Linked formulas via variable names
- Formula categorization
- Customizable variable display order
- Adjustable output decimal precision
- Email formula sharing
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This app is easy to use, but unlike simpler apps, multiple entered values can be fed into multiple formulas and multiple output values can be displayed. The output of one formula in a group can be fed into the next by using the same variable name. Related formulas can be grouped into categories to make them easy to find. e.g. Maths formulas, Surveying formulas, Loan interest formulas etc. The order of variables displayed to the user can be changed, as can the number of decimal digits of precision shown in the output fields. You can easily share formulas with other users of the app by emailing them. Three example formulas are pre-installed with the app. In order of increasing complexity they are: slope percentage, compound interest, and point scale factor.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Aviation Tools | Custom Formulas |
|---|---|---|
| Price | $1.99 — better | $3.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 33 months | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.4 |
| Further details — not scored | ||
| Size | 22 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Jorge Gonzalez Galvan | Anthony Dunk |
Customer experience
Aviation Tools
Custom Formulas
In-app purchases
Aviation Tools
No in-app purchases
Custom Formulas
No in-app purchases
Questions
Is Aviation Tools free?
Is Custom Formulas free?
Do Aviation Tools or Custom Formulas have ads?
Which is updated more often, Aviation Tools or Custom Formulas?
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