# TIMMS Site Viewer vs Pilot Assistant

The clearest difference is iOS requirement: TIMMS Site Viewer at 8.1 against Pilot Assistant's 11.0. On price, update cadence, ads 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.

TIMMS Site Viewer ships an update every 6 months, Pilot Assistant every 3 months. The most recent releases landed on October 11, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | TIMMS Site Viewer | Pilot Assistant |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/pilot-assistant/id6465624414/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 3 months** |
| Monetization | — | Free |
| Size | 78 MB | 48 MB |
| Requires iOS | **8.1** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Trimble Inc.](https://appshunter.io/developer/322561665) | [Roman Maslov](https://appshunter.io/developer/1656257160) |

## What reviewers say

### TIMMS Site Viewer

[App page](https://appshunter.io/ios/app/timms-site-viewer/id1109956778)

**Features:** Vision Pro support

**In-app purchases:** none


### Pilot Assistant

[App page](https://appshunter.io/ios/app/pilot-assistant/id6465624414)

This app helps flight simulator enthusiasts by providing tools for managing flight files, navigating with airport maps and saved routes, and using a compass for emergency planning. It's designed to assist pilots during training and improve their emergency response skills.

**Highlights:** Save important flight files and checklists, World airport map with route creation, Save and mark important radio frequencies, Compass with markers for emergency planning, Create and save custom flight routes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TIMMS Site Viewer free?

TIMMS Site Viewer is free to download, with no in-app purchases.

### Is Pilot Assistant free?

Pilot Assistant is free to download, with no in-app purchases.

### Do TIMMS Site Viewer or Pilot Assistant have ads?

Neither TIMMS Site Viewer nor Pilot Assistant shows ads.

### Which is updated more often, TIMMS Site Viewer or Pilot Assistant?

TIMMS Site Viewer ships an update every 6 months, and Pilot Assistant every 3 months. Most recently, TIMMS Site Viewer was updated on October 11, 2026 and Pilot Assistant on October 4, 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.*