# Flight Calcs vs Silverson Conversion Tools

The clearest difference is in-app purchases: Silverson Conversion Tools at none against Flight Calcs's 2. Silverson Conversion Tools also leads on ratings volume (3 vs 1) and iOS requirement (8.0 vs 17.6). Flight Calcs's advantage is rating (5.0 vs 4.7) and update cadence (every 2 months vs every 6 months). On price, ads, monetization model and device support there is nothing between them.

Both are free to download. Flight Calcs sells 2 in-app purchases, starting at $1.99 per month. Silverson Conversion Tools asks for nothing beyond the download.

Flight Calcs holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Flight Calcs ships an update every 2 months, Silverson Conversion Tools every 6 months. The most recent releases landed on September 30, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Flight Calcs | Silverson Conversion Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flight-calcs-pilot-toolkit/id444281468/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/silverson-conversion-tools/id626189811/reviews) |
| Number of ratings | 1 | **3** |
| Positive reviews | 83.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Monetization | Free | Free |
| Size | 39 MB | 9 MB |
| Requires iOS | 17.6 | **8.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Verosocial Studio](https://appshunter.io/developer/354566841) | [Silverson Machines Limited](https://appshunter.io/developer/626189814) |

## What reviewers say

### Flight Calcs

[App page](https://appshunter.io/ios/app/flight-calcs-pilot-toolkit/id444281468)

This app provides pilots with essential flight calculation tools for logging time, planning routes, and performing preflight checks. It offers accurate, real-world aviation calculations with familiar terminology and unit conventions.

**Highlights:** Pilot time logging and summing, Flight block/duty time calculation, Time-Speed-Distance (TSD) calculations, Wind component and True Airspeed (TAS) resolution, Density altitude computation, Fuel burn estimation, Weight and balance verification

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PilotCalculators pro monthly | $1.99 | per month |
| Pilot Calculators pro lifetime | $9.99 | one-time |


### Silverson Conversion Tools

[App page](https://appshunter.io/ios/app/silverson-conversion-tools/id626189811)

This app provides engineers and operations personnel with tools to calculate the volume of vertical tanks of various shapes and top/bottom styles. It also includes multiple conversion tools for common measurements and a browser for product information.

**Highlights:** Vertical tank volume calculation, Multiple tank shapes and top/bottom styles, Unit conversion tools, Email/Share calculation results, Integrated product browser

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flight Calcs free?

Flight Calcs is free to download, with in-app purchases available.

### Is Silverson Conversion Tools free?

Silverson Conversion Tools is free to download, with no in-app purchases.

### Which has better reviews, Flight Calcs or Silverson Conversion Tools?

Flight Calcs is rated higher. Flight Calcs averages 5.0 out of 5 from 1 ratings, while Silverson Conversion Tools averages 4.7 from 3 ratings.

### Do Flight Calcs or Silverson Conversion Tools have ads?

Neither Flight Calcs nor Silverson Conversion Tools shows ads.

### Which is updated more often, Flight Calcs or Silverson Conversion Tools?

Flight Calcs ships an update every 2 months, and Silverson Conversion Tools every 6 months. Most recently, Flight Calcs was updated on September 30, 2026 and Silverson Conversion Tools on September 17, 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.*