# Idea x Knock vs ティアメモ

The clearest difference is in-app purchases: Idea x Knock at none against ティアメモ's 3. Idea x Knock also leads on iOS requirement (13.0 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ティアメモ sells 3 in-app purchases, starting at $2.99 per month. Idea x Knock asks for nothing beyond the download.

Idea x Knock ships an update weekly, ティアメモ every 6 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Idea x Knock | ティアメモ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | **Every 6 days** |
| Size | 23 MB | 49 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kosuke Shimada](https://appshunter.io/developer/1529796493) | [Tomoya Ohashi](https://appshunter.io/developer/1800459005) |

## What reviewers say

### Idea x Knock

[App page](https://appshunter.io/ios/app/idea-x-knock/id1613942064)

**Features:** macOS Compatibility

**In-app purchases:** none


### ティアメモ

[App page](https://appshunter.io/ios/app/sns/id6759195422)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 機能アンロック（1ヶ月間） | $2.99 | per month |
| 機能アンロック（1年間） | $22.99 | per year |
| 機能アンロック | $24.99 | one-time |


## Frequently asked questions

### Is Idea x Knock free?

Idea x Knock is free to download, with no in-app purchases.

### Is ティアメモ free?

ティアメモ is free to download, with in-app purchases available.

### Do Idea x Knock or ティアメモ have ads?

Both Idea x Knock and ティアメモ show ads.

### Which is updated more often, Idea x Knock or ティアメモ?

Idea x Knock ships an update weekly, and ティアメモ every 6 days. Most recently, Idea x Knock was updated on October 25, 2026 and ティアメモ on October 24, 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.*