# Flight Document System vs Sentinel by AeroTechnology

The clearest difference is update cadence: Sentinel by AeroTechnology at every 3 weeks against Flight Document System's every 6 months. Flight Document System's advantage is iOS requirement (8.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Flight Document System ships an update every 6 months, Sentinel by AeroTechnology every 3 weeks. The most recent releases landed on October 1, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | Flight Document System | Sentinel by AeroTechnology |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flight-document-system/id875220362/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 4 MB | 220 MB |
| Requires iOS | **8.0** | 15.0 |
| Devices | iPad | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [EFB-Software, LLC](https://appshunter.io/developer/875220365) | [aerotechnology ltd](https://appshunter.io/developer/1699728336) |

## What reviewers say

### Flight Document System

[App page](https://appshunter.io/ios/app/flight-document-system/id875220362)

This app provides a paperless solution for airlines and flight crews, allowing pilots to replace physical documents with electronic versions on their iPads. It supports various file types and offers features like document search, messaging, and offline access.

**Highlights:** Paperless document replacement, Supports PDF, JPG, GIF, MP4, MOV, Document search and favorites, Admin messaging to crew, Offline document access, Night mode and full-screen view

**In-app purchases:** none


### Sentinel by AeroTechnology

[App page](https://appshunter.io/ios/app/sentinel-by-aerotechnology/id6504414788)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Flight Document System free?

Flight Document System is free to download, with no in-app purchases.

### Is Sentinel by AeroTechnology free?

Sentinel by AeroTechnology is free to download, with no in-app purchases.

### Do Flight Document System or Sentinel by AeroTechnology have ads?

Neither Flight Document System nor Sentinel by AeroTechnology shows ads.

### Which is updated more often, Flight Document System or Sentinel by AeroTechnology?

Flight Document System ships an update every 6 months, and Sentinel by AeroTechnology every 3 weeks. Most recently, Flight Document System was updated on October 1, 2026 and Sentinel by AeroTechnology on October 13, 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.*