# SNCB Lab vs Topomapviewer

The clearest difference is update cadence: Topomapviewer at weekly against SNCB Lab's every 2 months. SNCB Lab's advantage is iOS requirement (13.0 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.

SNCB Lab ships an update every 2 months, Topomapviewer weekly. The most recent releases landed on September 9, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | SNCB Lab | Topomapviewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Size | 89 MB | 78 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [NMBS / SNCB](https://appshunter.io/developer/403212067) | [NGI-IGN National Geograhical Institute of Belgium](https://appshunter.io/developer/1841414856) |

## What reviewers say

### SNCB Lab

[App page](https://appshunter.io/ios/app/sncb-lab/id1622811565)

**Features:** Vision Pro support

**In-app purchases:** none


### Topomapviewer

[App page](https://appshunter.io/ios/app/topomapviewer/id6752865628)

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

**In-app purchases:** none


## Frequently asked questions

### Is SNCB Lab free?

SNCB Lab is free to download, with no in-app purchases.

### Is Topomapviewer free?

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

### Do SNCB Lab or Topomapviewer have ads?

Neither SNCB Lab nor Topomapviewer shows ads.

### Which is updated more often, SNCB Lab or Topomapviewer?

SNCB Lab ships an update every 2 months, and Topomapviewer weekly. Most recently, SNCB Lab was updated on September 9, 2026 and Topomapviewer on September 25, 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.*