# Lazy FTL Calculator vs FlightDose

The clearest difference is in-app purchases: Lazy FTL Calculator at none against FlightDose's 1. Lazy FTL Calculator also leads on ads (none vs shown). FlightDose's advantage is update cadence (every 4 days vs every 2 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. FlightDose sells 1 one-off in-app purchase. Lazy FTL Calculator asks for nothing beyond the download.

Lazy FTL Calculator ships an update every 2 months, FlightDose every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Lazy FTL Calculator | FlightDose |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (8 ratings)](https://appshunter.io/ios/app/flightdose/id6759472369/reviews)** |
| Number of ratings | — | **8** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | — | Free |
| Size | 4 MB | 14 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Rafael Lara Mendez](https://appshunter.io/developer/1568197547) | [Apex Technology Group, Inc](https://appshunter.io/developer/1878815891) |

## What reviewers say

### Lazy FTL Calculator

[App page](https://appshunter.io/ios/app/lazy-ftl-calculator/id6748560420)

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

**In-app purchases:** none


### FlightDose

[App page](https://appshunter.io/ios/app/flightdose/id6759472369)

Estimates cosmic radiation exposure during flights using scientific aviation modeling. It calculates dose based on route, altitude, latitude, and solar conditions, presenting clear, data-driven insights into an invisible environmental factor.

**Highlights:** Estimates in-flight radiation dose, CARI-7 based modeling concepts, Accounts for altitude and position, Considers Earth's magnetic field, Supports route and flight estimation, Clear results presentation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remve Ads | $2.99 | one-time |


## Frequently asked questions

### Is Lazy FTL Calculator free?

Lazy FTL Calculator is free to download, with no in-app purchases.

### Is FlightDose free?

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

### Do Lazy FTL Calculator or FlightDose have ads?

FlightDose shows ads; Lazy FTL Calculator does not.

### Which is updated more often, Lazy FTL Calculator or FlightDose?

Lazy FTL Calculator ships an update every 2 months, and FlightDose every 4 days. Most recently, Lazy FTL Calculator was updated on October 30, 2026 and FlightDose on October 31, 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.*