# 履歴メモ vs Second Brain Vault

The clearest difference is in-app purchases: 履歴メモ at none against Second Brain Vault's 1. 履歴メモ also leads on iOS requirement (15.6 vs 26.0). Second Brain Vault's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Second Brain Vault sells 1 one-off in-app purchase. 履歴メモ asks for nothing beyond the download.

## The numbers

| Metric | 履歴メモ | Second Brain Vault |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Size | 5 MB | 2 MB |
| Requires iOS | **15.6** | 26.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [hirokazu murabe](https://appshunter.io/developer/894364772) | [Byoungho Kim](https://appshunter.io/developer/1888452963) |

## What reviewers say

### 履歴メモ

[App page](https://appshunter.io/ios/app/id6768883264)

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

**In-app purchases:** none


### Second Brain Vault

[App page](https://appshunter.io/ios/app/second-brain-vault/id6782200821)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Second Brain Vault (Lifetime) | $17.99 | one-time |


## Frequently asked questions

### Is 履歴メモ free?

履歴メモ is free to download, with no in-app purchases.

### Is Second Brain Vault free?

Second Brain Vault is free to download, with in-app purchases available.

### Do 履歴メモ or Second Brain Vault have ads?

履歴メモ shows ads; Second Brain Vault does not.

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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.*