# trd.by vs Nidaros

The clearest difference is update cadence: Nidaros at monthly against trd.by's every 3 months. trd.by's advantage is device support (4 vs 2) and iOS requirement (15.0 vs 17.0). On price, 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.

trd.by ships an update every 3 months, Nidaros monthly. The most recent releases landed on September 13, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | trd.by | Nidaros |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Monthly** |
| Size | 7 MB | 40 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Polaris Media ASA](https://appshunter.io/developer/415621266) | [Amedia AS](https://appshunter.io/developer/423980137) |

## What reviewers say

### trd.by

[App page](https://appshunter.io/ios/app/trdby/id993587874)

**Features:** macOS Compatibility

**In-app purchases:** none


### Nidaros

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

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

**In-app purchases:** none


## Frequently asked questions

### Is trd.by free?

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

### Is Nidaros free?

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

### Do trd.by or Nidaros have ads?

Both trd.by and Nidaros show ads.

### Which is updated more often, trd.by or Nidaros?

trd.by ships an update every 3 months, and Nidaros monthly. Most recently, trd.by was updated on September 13, 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.*