# NDFF invoer vs BirdRing

The clearest difference is update cadence: BirdRing at monthly against NDFF invoer's every 9 months. NDFF invoer's advantage is device support (3 vs 1) and iOS requirement (10.0 vs 18.6). 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.

NDFF invoer ships an update every 9 months, BirdRing monthly. The most recent releases landed on October 13, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | NDFF invoer | BirdRing |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 months | **Monthly** |
| Size | 18 MB | 8 MB |
| Requires iOS | **10.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [BIJ12](https://appshunter.io/developer/1584095478) | [Mario Huizinga](https://appshunter.io/developer/1439768063) |

## What reviewers say

### NDFF invoer

[App page](https://appshunter.io/ios/app/ndff-invoer/id1068127600)

**Features:** macOS Compatibility

**In-app purchases:** none


### BirdRing

[App page](https://appshunter.io/ios/app/birdring/id1439768064)

**In-app purchases:** none


## Frequently asked questions

### Is NDFF invoer free?

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

### Is BirdRing free?

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

### Do NDFF invoer or BirdRing have ads?

Neither NDFF invoer nor BirdRing shows ads.

### Which is updated more often, NDFF invoer or BirdRing?

NDFF invoer ships an update every 9 months, and BirdRing monthly. Most recently, NDFF invoer was updated on October 13, 2026 and BirdRing on October 14, 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.*