# OPP eAvis vs Nidaros

The clearest difference is in-app purchases: Nidaros at none against OPP eAvis's 1. Nidaros also leads on update cadence (monthly vs every 9 months). OPP eAvis's advantage is iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. OPP eAvis sells 1 in-app purchase, starting at $17.49 per month. Nidaros asks for nothing beyond the download.

OPP eAvis ships an update every 9 months, Nidaros monthly. The most recent releases landed on September 7, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | OPP eAvis | Nidaros |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 9 months | **Monthly** |
| Size | 29 MB | 40 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 17+ |
| Developer | [Polaris Media ASA](https://appshunter.io/developer/415621266) | [Amedia AS](https://appshunter.io/developer/423980137) |

## What reviewers say

### OPP eAvis

[App page](https://appshunter.io/ios/app/opp-eavis/id1059536719)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tilgang til eAvis i 30 dager | $17.49 | per month |


### Nidaros

[App page](https://appshunter.io/ios/app/nidaros/id1494465536)

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

**In-app purchases:** none


## Frequently asked questions

### Is OPP eAvis free?

OPP eAvis is free to download, with in-app purchases available.

### Is Nidaros free?

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

### Do OPP eAvis or Nidaros have ads?

Both OPP eAvis and Nidaros show ads.

### Which is updated more often, OPP eAvis or Nidaros?

OPP eAvis ships an update every 9 months, and Nidaros monthly. Most recently, OPP eAvis was updated on September 7, 2026 and Nidaros on September 19, 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.*