# Year One vs K.O. II

Year One and K.O. II are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Year One | K.O. II |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/year-one/id1282314928/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Monetization | Free | — |
| Size | 407 MB | 1 MB |
| Requires iOS | 17.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TCW](https://appshunter.io/developer/1193839943) | [海洋 符](https://appshunter.io/developer/1763768138) |

## What reviewers say

### Year One

[App page](https://appshunter.io/ios/app/year-one/id1282314928)

Experience music in a new dimension with augmented reality. Move around your space to uncover hidden sounds, build melodies, and create unique listening experiences by interacting with spatial audio arrangements.

**Highlights:** Spatial album listening, Augmented reality soundscapes, Interactive music exploration, Build melodies and chords, Dynamic audio effects, Create unique listening experiences

**In-app purchases:** none


### K.O. II

[App page](https://appshunter.io/ios/app/ko-ii/id6781550924)

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

**In-app purchases:** none


## Frequently asked questions

### Is Year One free?

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

### Is K.O. II free?

K.O. II is free to download, with no in-app purchases.

### Do Year One or K.O. II have ads?

Neither Year One nor K.O. II shows ads.

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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.*