# ku vs Silence

The clearest difference is ads: Silence at none against ku's shown. Silence also leads on update cadence (every 10 days vs every 2 months). ku's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and in-app purchases there is nothing between them.

Both are free to download. ku sells 10 in-app purchases, starting at $5.99 per 2 months and Silence sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ku ships an update every 2 months, Silence every 10 days. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | ku | Silence |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | — | Free |
| Size | 41 MB | 5 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [マガジンハウス](https://appshunter.io/developer/390114571) | [SAELI, LIMITED LIABILITY COMPANY](https://appshunter.io/developer/1450627776) |

## What reviewers say

### ku

[App page](https://appshunter.io/ios/app/kunel/id1175291190)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ku:nel定期購読 | $5.99 | per 2 months |
| ku:nel定期購読 | $16.99 | per 6 months |
| ku:nel定期購読 | $31.99 | per year |
| 2026年11月号 | $5.99 | one-time |
| 2025年9月号 | $5.99 | one-time |
| 2025年7月号 | $5.99 | one-time |
| 2026年7月号 | $5.99 | one-time |
| 2026年9月号 | $5.99 | one-time |
| クウネル特別編集　整え上手たちの自宅公開！ | $9.99 | one-time |
| クウネル特別編集　フランスのいいモノとライフスタイル | $9.99 | one-time |


### Silence

[App page](https://appshunter.io/ios/app/silence-airplane-mode-focus/id6761509846)

This app encourages digital detox by rewarding offline time with a virtual flight experience. Users earn progress by staying in airplane mode, unlocking new destinations and tracking their quiet time.

**Highlights:** Virtual flight journey progresses offline, Airplane mode activation, Flight log and calendar, On-device cabin sound, Lock Screen and Dynamic Island integration

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月間燃料無制限 | $2.99 | per month |
| 燃料補充(5,000km) | $0.99 | one-time |


## Frequently asked questions

### Is ku free?

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

### Is Silence free?

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

### Do ku or Silence have ads?

ku shows ads; Silence does not.

### Which is updated more often, ku or Silence?

ku ships an update every 2 months, and Silence every 10 days. Most recently, ku was updated on November 2, 2026 and Silence on October 31, 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.*