# Sofia VAC vs WingLog ULM

The clearest difference is in-app purchases: Sofia VAC at none against WingLog ULM's 2. Sofia VAC also leads on iOS requirement (15.6 vs 17.0). WingLog ULM's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads and device support there is nothing between them.

Both are free to download. WingLog ULM sells 2 in-app purchases, starting at $3.99 per month. Sofia VAC asks for nothing beyond the download.

Sofia VAC ships an update every 3 months, WingLog ULM every 3 weeks. The most recent releases landed on September 21, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Sofia VAC | WingLog ULM |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 25.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 25 MB | 28 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [DIR SERVICES DE NAVIGATION AERIENNE](https://appshunter.io/developer/1519391493) | [Giulio Fontana](https://appshunter.io/developer/1871597288) |

## What reviewers say

### Sofia VAC

[App page](https://appshunter.io/ios/app/sofia-vac/id1519391491)

This app provides access to French aeronautical information, including airfield details and dynamic VAC maps. Users can search for airfields by name or code, filter by runway characteristics, and download maps for offline use. It offers personalized map views with various airspace and navigational point overlays.

**Highlights:** Search airfields by name, ICAO code, or map, Filter airfields by runway length and surface, Consult dynamic VAC maps, Personalize map views with airspaces and VFR points, Download maps for offline access, Receive update notifications

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

**In-app purchases:** none


### WingLog ULM

[App page](https://appshunter.io/ios/app/winglog-ulm/id6774974451)

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Monthly Plan | $3.99 | per month |
| PRO Annual Plan | $24.99 | per year |


## Frequently asked questions

### Is Sofia VAC free?

Sofia VAC is free to download, with no in-app purchases.

### Is WingLog ULM free?

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

### Do Sofia VAC or WingLog ULM have ads?

Neither Sofia VAC nor WingLog ULM shows ads.

### Which is updated more often, Sofia VAC or WingLog ULM?

Sofia VAC ships an update every 3 months, and WingLog ULM every 3 weeks. Most recently, Sofia VAC was updated on September 21, 2026 and WingLog ULM on August 21, 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.*