# IGS vs Lähden App

The clearest difference is update cadence: IGS at every 8 months against Lähden App's every 39 months. Lähden App's advantage is iOS requirement (11.0 vs 14.0). 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.

IGS ships an update every 8 months, Lähden App every 39 months. Both last shipped on November 3, 2026.

## The numbers

| Metric | IGS | Lähden App |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 39 months |
| Monetization | Free | — |
| Size | 246 MB | 26 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [KISTERS AG](https://appshunter.io/developer/952206147) | [Frank Reiling](https://appshunter.io/developer/1117753053) |

## What reviewers say

### IGS

[App page](https://appshunter.io/ios/app/igs-public/id1485234040)

Provides comprehensive information on hazardous materials for the public and emergency responders. Access detailed data on chemical properties, safety measures, and emergency procedures.

**Highlights:** Hazardous material information, Public access, Emergency responder data, Safety measures, Emergency procedures

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

**In-app purchases:** none


### Lähden App

[App page](https://appshunter.io/ios/app/lahden-app/id1579624584)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is IGS free?

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

### Is Lähden App free?

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

### Do IGS or Lähden App have ads?

Neither IGS nor Lähden App shows ads.

### Which is updated more often, IGS or Lähden App?

IGS ships an update every 8 months, and Lähden App every 39 months. Most recently, IGS was updated on November 3, 2026 and Lähden App on November 3, 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.*