# Cost Index vs QT Random Number Generator

The clearest difference is ads: Cost Index at none against QT Random Number Generator's shown. Cost Index also leads on monetization model (free vs ad-supported) and iOS requirement (8.0 vs 17.6). QT Random Number Generator's advantage is ratings volume (5 vs 1). On price, rating, update cadence and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 5.0 for Cost Index against 5.0 for QT Random Number Generator. That said, the two scores are not equally well evidenced: QT Random Number Generator has 5 ratings behind it against 1, so its average is the more settled of the two.

Cost Index ships an update every 16 months, QT Random Number Generator every 11 months. The most recent releases landed on October 29, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Cost Index | QT Random Number Generator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/cost-index/id671845599/reviews) | [5.0 (5 ratings)](https://appshunter.io/ios/app/qt-random-number-generator/id6483002122/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 16 months | **Every 11 months** |
| Monetization | **Free** | Ad-supported |
| Size | 3 MB | 12 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Flight Efficiency Limited](https://appshunter.io/developer/466443228) | [Web Services Utah LLC](https://appshunter.io/developer/1740012772) |

## What reviewers say

### Cost Index

[App page](https://appshunter.io/ios/app/cost-index/id671845599)

This app helps airline and corporate aircraft operators achieve significant operational savings by calculating the optimum cruise speed for flights based on pilot-inputted conditions and aircraft-specific data. It offers advanced features for cost, fuel, and time optimization, including level change analysis and turbulence margin adjustments.

**Highlights:** Optimum cruise speed calculation, Customizable operational data display, Minimum fuel burn speed for long range, Turbulence margin adjustment, Level change analysis for climb/descent decisions, Automated data updates

**Features:** macOS Compatibility

**In-app purchases:** none


### QT Random Number Generator

[App page](https://appshunter.io/ios/app/qt-random-number-generator/id6483002122)

Generate random numbers quickly and easily for various purposes. This app offers a clean interface and accurate results without requiring an account or internet connection. It's perfect for games, decision-making, or any situation needing a random outcome.

**Highlights:** Generate random numbers, Set maximum value, Clean, modern interface, Quick and accurate results, No account required, Works offline

**In-app purchases:** none


## Frequently asked questions

### Is Cost Index free?

Cost Index is free to download, with no in-app purchases.

### Is QT Random Number Generator free?

QT Random Number Generator is free to download, with no in-app purchases.

### Which has better reviews, Cost Index or QT Random Number Generator?

Cost Index and QT Random Number Generator are both rated 5.0 out of 5 on the App Store, from 1 and 5 ratings respectively.

### Do Cost Index or QT Random Number Generator have ads?

QT Random Number Generator shows ads; Cost Index does not.

### Which is updated more often, Cost Index or QT Random Number Generator?

Cost Index ships an update every 16 months, and QT Random Number Generator every 11 months. Most recently, Cost Index was updated on October 29, 2026 and QT Random Number Generator on October 24, 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.*